Jan Glauber [Fri, 23 Mar 2012 10:13:04 +0000 (11:13 +0100)]
[S390] qdio: log all adapter characteristics
Log all adapter characteristics in the s390dbf to ease debugging of
new features.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Reported-by: Raymond Higgs <rayhiggs@us.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Linus Torvalds [Fri, 23 Mar 2012 03:43:40 +0000 (20:43 -0700)]
Merge tag 'fbdev-updates-for-3.4' of git://github.com/schandinat/linux-2.6
Pull fbdev updates for 3.4 from Florian Tobias Schandinat:
- drivers for Samsung Exynos MIPI DSI and display port
- i740fb to support those old Intel chips
- large updates to OMAP, viafb and sh_mobile_lcdcfb
- some updates to s3c-fb and udlfb, few patches to others
Fix up conflicts in drivers/video/udlfb.c due to Key Sievers' fix making
it in twice.
* tag 'fbdev-updates-for-3.4' of git://github.com/schandinat/linux-2.6: (156 commits)
Revert "video:uvesafb: Fix oops that uvesafb try to execute NX-protected page"
OMAPDSS: register dss drivers in module init
video: pxafb: add clk_prepare/clk_unprepare calls
fbdev: bfin_adv7393fb: Drop needless include
fbdev: sh_mipi_dsi: add extra phyctrl for sh_mipi_dsi_info
fbdev: remove dependency of FB_SH_MOBILE_MERAM from FB_SH_MOBILE_LCDC
Revert "MAINTAINERS: add entry for exynos mipi display drivers"
fbdev: da8xx: add support for SP10Q010 display
fbdev: da8xx:: fix reporting of the display timing info
drivers/video/pvr2fb.c: ensure arguments to request_irq and free_irq are compatible
OMAPDSS: APPLY: fix clearing shadow dirty flag with manual update
fbdev: sh_mobile_meram: Implement system suspend/resume
fbdev: sh_mobile_meram: Remove unneeded sanity checks
fbdev: sh_mobile_meram: Don't perform update in register operation
arm: mach-shmobile: Constify sh_mobile_meram_cfg structures
fbdev: sh_mobile_lcdc: Don't store copy of platform data
fbdev: sh_mobile_meram: Remove unused sh_mobile_meram_icb_cfg fields
arm: mach-shmobile: Don't set MERAM ICB numbers in platform data
fbdev: sh_mobile_meram: Allocate ICBs automatically
fbdev: sh_mobile_meram: Use genalloc to manage MERAM allocation
...
Linus Torvalds [Fri, 23 Mar 2012 03:33:14 +0000 (20:33 -0700)]
Merge tag 'regmap-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap updates from Mark Brown:
"Things are really quieting down with the regmap API, while we're still
seeing a trickle of new features coming in they're getting much
smaller than they were. It's also nice to have some features which
support other subsystems building infrastructure on top of regmap.
Highlights include:
- Support for padding between the register and the value when
interacting with the device, sometimes needed for fast interfaces.
- Support for applying register updates to the device when restoring
the register state. This is intended to be used to apply updates
supplied by manufacturers for tuning the performance of the device
(many of which are to undocumented registers which aren't otherwise
covered).
- Support for multi-register operations on cached registers.
- Support for syncing only part of the register cache.
- Stubs and parameter query functions intended to make it easier for
other subsystems to build infrastructure on top of the regmap API.
plus a few driver updates making use of the new features which it was
easier to merge via this tree."
* tag 'regmap-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: (41 commits)
regmap: Fix future missing prototype of devres_alloc() and friends
regmap: Rejig struct declarations for stubbed API
regmap: Fix rbtree block base in sync
regcache: Make sure we sync register 0 in an rbtree cache
regmap: delete unused module.h from drivers/base/regmap files
regmap: Add stub for regcache_sync_region()
mfd: Improve performance of later WM1811 revisions
regmap: Fix x86_64 breakage
regmap: Allow drivers to sync only part of the register cache
regmap: Supply ranges to the sync operations
regmap: Add tracepoints for cache only and cache bypass
regmap: Mark the cache as clean after a successful sync
regmap: Remove default cache sync implementation
regmap: Skip hardware defaults for LZO caches
regmap: Expose the driver name in debugfs
mfd: wm8400: Convert to devm_regmap_init_i2c()
mfd: wm831x: Convert to devm_regmap_init()
mfd: wm8994: Convert to devm_regmap_init()
mfd/ASoC: Convert WM8994 driver to use regmap patches
mfd: Add __devinit and __devexit annotations in wm8994
...
Linus Torvalds [Fri, 23 Mar 2012 03:31:15 +0000 (20:31 -0700)]
Merge tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull IEEE 1394 (FireWire) subsystem updates post v3.3 from Stefan Richter:
- Some SBP-2 initiator fixes, side product from ongoing work on a target.
- Reintroduction of an isochronous I/O feature of the older ieee1394 driver
stack (flush buffer completions); it was evidently rarely used but not
actually unused. Matching libraw1394 code is already available.
- Be sure to prefix all kernel log messages with device name or card name,
and other logging related cleanups.
- Misc other small cleanups, among them a small API change that affects
sound/firewire/ too. Clemens Ladisch is aware of it.
* tag 'firewire-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394: (26 commits)
firewire: allow explicit flushing of iso packet completions
firewire: prevent dropping of completed iso packet header data
firewire: ohci: factor out iso completion flushing code
firewire: ohci: simplify iso header pointer arithmetic
firewire: ohci: optimize control bit checks
firewire: ohci: remove unused excess_bytes field
firewire: ohci: copy_iso_headers(): make comment match the code
firewire: cdev: fix IR multichannel event documentation
firewire: ohci: fix too-early completion of IR multichannel buffers
firewire: ohci: move runtime debug facility out of #ifdef
firewire: tone down some diagnostic log messages
firewire: sbp2: replace a GFP_ATOMIC allocation
firewire: sbp2: Fix SCSI sense data mangling
firewire: sbp2: Ignore SBP-2 targets on the local node
firewire: sbp2: Take into account Unit_Unique_ID
firewire: nosy: Use the macro DMA_BIT_MASK().
firewire: core: convert AR-req handler lock from _irqsave to _bh
firewire: core: fix race at address_handler unregistration
firewire: core: remove obsolete comment
firewire: core: prefix log messages with card name
...
Linus Torvalds [Fri, 23 Mar 2012 03:25:50 +0000 (20:25 -0700)]
Merge tag 'pinctrl-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl updates for v3.4 from Linus Walleij (*):
- Switches the PXA 168, 910 and MMP over to use pinctrl
- Locking revamped
- Massive refactorings...
- Reform the driver API to use multiple states
- Support pin config in the mapping tables
- Pinctrl drivers for the nVidia Tegra series
- Generic pin config support lib for simple pin controllers
- Implement pin config for the U300
* tag 'pinctrl-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (48 commits)
ARM: u300: configure some pins as an example
pinctrl: support pinconfig on the U300
pinctrl/coh901: use generic pinconf enums and parameters
pinctrl: introduce generic pin config
pinctrl: fix error path in pinconf_map_to_setting()
pinctrl: allow concurrent gpio and mux function ownership of pins
pinctrl: forward-declare struct device
pinctrl: split pincontrol states into its own header
pinctrl: include machine header to core.h
ARM: tegra: Select PINCTRL Kconfig variables
pinctrl: add a driver for NVIDIA Tegra
pinctrl: Show selected function and group in pinmux-pins debugfs
pinctrl: enhance mapping table to support pin config operations
pinctrl: API changes to support multiple states per device
pinctrl: add usecount to pins for muxing
pinctrl: refactor struct pinctrl handling in core.c vs pinmux.c
pinctrl: fix and simplify locking
pinctrl: fix the pin descriptor kerneldoc
pinctrl: assume map table entries can't have a NULL name field
pinctrl: introduce PINCTRL_STATE_DEFAULT, define hogs as that state
...
(*) What is it with all these Linuses these days? There's a Linus at
google too. Some day I will get myself my own broadsword, and run
around screaming "There can be only one".
Linus Torvalds [Fri, 23 Mar 2012 03:22:30 +0000 (20:22 -0700)]
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
Pull libata updates from Jeff Garzik:
1) AHCI regression fix. A recent "make driver conform to spec" change
broke on deployed hardware. Make new behavior optional, rather than
default, turning it on only for specific embedded platforms that
need this.
Everybody else runs in the famous "non conformant but working" mode.
2) pata_cmd64x, pata_legacy cleanups
3) new Intel SATA PCI IDs
4) misc minor vendor feature additions
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
pata_cmd64x: implement sff_irq_check() method
pata_cmd64x: implement sff_irq_clear() method
pata_cmd64x: use interrupt status from MRDMODE register
pata_cmd64x: turn string of *if* statements into *switch*
drivers/ata/pata_mpc52xx.c: clean up error handling code
ahci_platform: add STRICT_AHCI platform type
ahci: move AHCI_HFLAGS() macro to ahci.h
ahci: add AHCI_HFLAG_DELAY_ENGINE host flag
sata_fsl: add support for interrupt coalsecing feature
ata/pata_arasan_cf: Add Hibernation support
pata_legacy: correctly mask recovery field for HT6560B
ata_piix: IDE-mode SATA patch for Intel Lynx Point DeviceIDs
ahci: AHCI-mode SATA patch for Intel Lynx Point DeviceIDs
Linus Torvalds [Fri, 23 Mar 2012 03:20:18 +0000 (20:20 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input subsystem updates from Dmitry Torokhov:
"- we finally merged driver for USB version of Synaptics touchpads
(I guess most commonly found in IBM/Lenovo keyboard/touchpad combo);
- a bunch of new drivers for embedded platforms (Cypress
touchscreens, DA9052 OnKey, MAX8997-haptic, Ilitek ILI210x
touchscreens, TI touchscreen);
- input core allows clients to specify desired clock source for
timestamps on input events (EVIOCSCLOCKID ioctl);
- input core allows querying state of all MT slots for given event
code via EVIOCGMTSLOTS ioctl;
- various driver fixes and improvements."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (45 commits)
Input: ili210x - add support for Ilitek ILI210x based touchscreens
Input: altera_ps2 - use of_match_ptr()
Input: synaptics_usb - switch to module_usb_driver()
Input: convert I2C drivers to use module_i2c_driver()
Input: convert SPI drivers to use module_spi_driver()
Input: omap4-keypad - move platform_data to <linux/platform_data>
Input: kxtj9 - who_am_i check value and initial data rate fixes
Input: add driver support for MAX8997-haptic
Input: tegra-kbc - revise device tree support
Input: of_keymap - add device tree bindings for simple key matrices
Input: wacom - fix physical size calculation for 3rd-gen Bamboo
Input: twl4030-vibra - really switch from #if to #ifdef
Input: hp680_ts_input - ensure arguments to request_irq and free_irq are compatible
Input: max8925_onkey - avoid accessing input device too early
Input: max8925_onkey - allow to be used as a wakeup source
Input: atmel-wm97xx - convert to dev_pm_ops
Input: atmel-wm97xx - set driver owner
Input: add cyttsp touchscreen maintainer entry
Input: cyttsp - remove useless checks in cyttsp_probe()
Input: usbtouchscreen - add support for Data Modul EasyTouch TP 72037
...
Pull crypto fixes from Herbert Xu:
"This fixes a build problem where two crypto modules both try to export
the same symbols (which shouldn't have been exported in the first
place)."
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: twofish-x86_64-3way - module init/exit functions should be static
crypto: camellia-x86_64 - module init/exit functions should be static
Linus Torvalds [Fri, 23 Mar 2012 02:59:19 +0000 (19:59 -0700)]
Merge tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
Pull xen updates from Konrad Rzeszutek Wilk:
"which has three neat features:
- PV multiconsole support, so that there can be hvc1, hvc2, etc; This
can be used in HVM and in PV mode.
- P-state and C-state power management driver that uploads said power
management data to the hypervisor. It also inhibits cpufreq
scaling drivers to load so that only the hypervisor can make power
management decisions - fixing a weird perf bug.
There is one thing in the Kconfig that you won't like: "default y
if (X86_ACPI_CPUFREQ = y || X86_POWERNOW_K8 = y)" (note, that it
all depends on CONFIG_XEN which depends on CONFIG_PARAVIRT which by
default is off). I've a fix to convert that boolean expression
into "default m" which I am going to post after the cpufreq git
pull - as the two patches to make this work depend on a fix in Dave
Jones's tree.
- Function Level Reset (FLR) support in the Xen PCI backend.
Fixes:
- Kconfig dependencies for Xen PV keyboard and video
- Compile warnings and constify fixes
- Change over to use percpu_xxx instead of this_cpu_xxx"
Fix up trivial conflicts in drivers/tty/hvc/hvc_xen.c due to changes to
a removed commit.
* tag 'stable/for-linus-3.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen kconfig: relax INPUT_XEN_KBDDEV_FRONTEND deps
xen/acpi-processor: C and P-state driver that uploads said data to hypervisor.
xen: constify all instances of "struct attribute_group"
xen/xenbus: ignore console/0
hvc_xen: introduce HVC_XEN_FRONTEND
hvc_xen: implement multiconsole support
hvc_xen: support PV on HVM consoles
xenbus: don't free other end details too early
xen/enlighten: Expose MWAIT and MWAIT_LEAF if hypervisor OKs it.
xen/setup/pm/acpi: Remove the call to boot_option_idle_override.
xenbus: address compiler warnings
xen: use this_cpu_xxx replace percpu_xxx funcs
xen/pciback: Support pci_reset_function, aka FLR or D3 support.
pci: Introduce __pci_reset_function_locked to be used when holding device_lock.
xen: Utilize the restore_msi_irqs hook.
Linus Torvalds [Fri, 23 Mar 2012 02:52:47 +0000 (19:52 -0700)]
Merge tag 'stable/for-linus-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm
Pull cleancache changes from Konrad Rzeszutek Wilk:
"This has some patches for the cleancache API that should have been
submitted a _long_ time ago. They are basically cleanups:
- rename of flush to invalidate
- moving reporting of statistics into debugfs
- use __read_mostly as necessary.
Oh, and also the MAINTAINERS file change. The files (except the
MAINTAINERS file) have been in #linux-next for months now. The late
addition of MAINTAINERS file is a brain-fart on my side - didn't
realize I needed that just until I was typing this up - and I based
that patch on v3.3 - so the tree is on top of v3.3."
* tag 'stable/for-linus-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm:
MAINTAINERS: Adding cleancache API to the list.
mm: cleancache: Use __read_mostly as appropiate.
mm: cleancache: report statistics via debugfs instead of sysfs.
mm: zcache/tmem/cleancache: s/flush/invalidate/
mm: cleancache: s/flush/invalidate/
Linus Torvalds [Fri, 23 Mar 2012 01:15:32 +0000 (18:15 -0700)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 patches from Martin Schwidefsky:
"The biggest patch is the rework of the smp code, something I wanted to
do for some time. There are some patches for our various dump methods
and one new thing: z/VM LGR detection. LGR stands for linux-guest-
relocation and is the guest migration feature of z/VM. For debugging
purposes we keep a log of the systems where a specific guest has lived."
Fix up trivial conflict in arch/s390/kernel/smp.c due to the scheduler
cleanup having removed some code next to removed s390 code.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
[S390] kernel: Pass correct stack for smp_call_ipl_cpu()
[S390] Ensure that vmcore_info pointer is never accessed directly
[S390] dasd: prevent validate server for offline devices
[S390] Remove monolithic build option for zcrypt driver.
[S390] stack dump: fix indentation in output
[S390] kernel: Add OS info memory interface
[S390] Use block_sigmask()
[S390] kernel: Add z/VM LGR detection
[S390] irq: external interrupt code passing
[S390] irq: set __ARCH_IRQ_EXIT_IRQS_DISABLED
[S390] zfcpdump: Implement async sdias event processing
[S390] Use copy_to_absolute_zero() instead of "stura/sturg"
[S390] rework idle code
[S390] rework smp code
[S390] rename lowcore field
[S390] Fix gcc 4.6.0 compile warning
Linus Torvalds [Fri, 23 Mar 2012 00:01:41 +0000 (17:01 -0700)]
security: optimize avc_audit() common path
avc_audit() did a lot of jumping around and had a big stack frame, all
for the uncommon case.
Split up the uncommon case (which we really can't make go fast anyway)
into its own slow function, and mark the conditional branches
appropriately for the common likely case.
This causes avc_audit() to no longer show up as one of the hottest
functions on the branch profiles (the new "perf -b" thing), and makes
the cycle profiles look really nice and dense too.
The whole audit path is still annoyingly very much one of the biggest
costs of name lookup, so these things are worth optimizing for. I wish
we could just tell people to turn it off, but realistically we do need
it: we just need to make sure that the overhead of the necessary evil is
as low as possible.
Linus Torvalds [Thu, 22 Mar 2012 23:10:40 +0000 (16:10 -0700)]
vfs: tidy up sparse warnings in fs/namei.c
While doing the fs/namei.c cleanups, I ran sparse on it, and it pointed
out other large integers and a couple of cases of us using '0' instead
of the proper 'NULL'.
Sparse still doesn't understand some of the conditional locking going
on, but that's no excuse for not fixing up the trivial stuff.
Randy Dunlap [Mon, 19 Mar 2012 04:23:05 +0000 (21:23 -0700)]
fs: fix kernel-doc warnings in dcache.c
Fix kernel-doc warnings in fs/dcache.c:
Warning(fs/dcache.c:1743): No description found for parameter 'seqp'
Warning(fs/dcache.c:1743): Excess function parameter 'seq' description in '__d_lookup_rcu'
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Thu, 22 Mar 2012 20:27:02 +0000 (13:27 -0700)]
Merge branch 'drm-nouveau-destage' of git://people.freedesktop.org/~airlied/linux
Pull nouveau destaging + Kelper modesetting support from Dave Airlie:
"This pull request is unexpected and not something I had mentioned
previously.
So NVIDIA announced new Kepler GPUs this morning, and Ben has killed
himself getting modesetting support for them together to have on
launch day. Most of the code to support the new chips has already
gone in, however this pull contains a few more pieces along with the
final enables so the driver binds to the new Kepler cards. Its quite
amazing that nouveau can support a GPU on its launch day even if its
just unaccelerated modesetting, and I'd like to have support in the
next kernel.
In order to sweeten the deal, Ben has also requested nouveau destage
and become ABI stable, the only change is the version number bump
which he prepared userspace for quite a long time ago. The driver
hasn't broken ABI since that one big break that caused a lot of fuss.
It's also quite a small set of code, and not likely to break anything."
* 'drm-nouveau-destage' of git://people.freedesktop.org/~airlied/linux:
drm/nouveau/dp: support version 4.0 of DP table
drm/nve0/disp: nvidia randomly decided to move the dithering method
drm/nve0: initial modesetting support for kepler chipsets
drm/nouveau: add bios connector type for dms59
drm/nouveau: move out of staging drivers
drm/nouveau: bump version to 1.0.0
drm/nvd0/disp: ignore clock set if no pclk
drm/nouveau: oops, increase channel dispc_vma to 4
drm/nouveau: inform userspace of new kernel subchannel requirements
drm/nouveau: remove m2mf creation on userspace channels
drm/nvc0-/disp: reimplement flip completion method as fifo method
drm/nouveau: move fence sequence check to start of loop
drm/nouveau: remove subchannel names from places where it doesn't matter
drm/nouveau/ttm: always do buffer moves on kernel channel
Linus Torvalds [Thu, 22 Mar 2012 20:23:46 +0000 (13:23 -0700)]
Merge branch 'drm-radeon-sitn-support' of git://people.freedesktop.org/~airlied/linux
Pull radeon southern islands / trinity support from Dave Airlie:
"This is support from AMD for their newest GPU and APUs. The products
called RadeonHD 7xxx, and the Trinity APU series.
This did come in a bit late, due to some over-complicated AMD internal
review process, which from the outside seems unnecessary once the
company has decided it wants to support open source. However as I
said previously I'd rather not put the people who've got this hw for 3
months now being forced to use fglrx on it if there is open code.
Its pretty well self contained and just plugs into the driver in
various places."
* 'drm-radeon-sitn-support' of git://people.freedesktop.org/~airlied/linux: (48 commits)
drm/radeon/kms: update duallink checks for DCE6
drm/radeon/kms: add trinity pci ids
drm/radeon/kms: add radeon_asic struct for trinity
drm/radeon/kms: add support for ucode loading on trinity (v2)
drm/radeon/kms/vm: set vram base offset properly for TN
drm/radeon/kms: Update evergreen functions for trinity
drm/radeon/kms: cayman gpu init updates for trinity
drm/radeon/kms: Add checks for TN in the DP bridge code
drm/radeon/kms/DCE6.1: ss is not supported on the internal pplls
drm/radeon/kms: disable PPLL0 on DCE6.1 when not in use
drm/radeon/kms: Adjust pll picker for DCE6.1
drm/radeon/kms: DCE6.1 disp eng pll updates
drm/radeon/kms: DCE6.1 watermark updates for TN
drm/radeon/kms: no support for internal thermal sensor on TN yet
drm/radeon/kms: add trinity (TN) chip family
drm/radeon/kms: Add SI pci ids
drm/radeon: Update radeon_info_ioctl for SI. (v2)
drm/radeon/kms: add radeon_asic struct for SI
drm/radeon/kms: add support for compute rings in CS ioctl on SI
drm/radeon/kms: fill in startup/shutdown callbacks for SI
...
Linus Torvalds [Thu, 22 Mar 2012 20:08:22 +0000 (13:08 -0700)]
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm main changes from Dave Airlie:
"This is the main drm pull request, I'm probably going to send two more
smaller ones, will explain below.
This contains a patch that is also in the fbdev tree, but it should be
the same patch, it added an API for hot unplugging framebuffer
devices, and I need that API for a new driver.
It also contains some changes to the i2c tree which Jean has acked,
and one change to moorestown platform stuff in x86.
Highlights:
- new drivers: UDL driver for USB displaylink devices, kms only,
should support correct hotplug operations.
- core: i2c speedups + better hotplug support, EDID overriding via
firmware interface - allows user to load a firmware for a broken
monitor/kvm from userspace, it even has documentation for it.
- exynos: new HDMI audio + hdmi 1.4 + virtual output driver
- gma500: code cleanup
- radeon: cleanups, CS optimisations, streamout support and pageflip
fix
- nouveau: NVD9 displayport support + more reclocking work
- i915: re-enabling GMBUS, finish gpu patch (might help hibernation
who knows), missed irq fixes, stencil tiling fixes, interlaced
support, aliasesd PPGTT support for SNB/IVB, swizzling for SNB/IVB,
semaphore fixes
As well as the usual bunch of cleanups and fixes all over the place.
I've got two things I'd like to merge a bit later:
a) AMD support for all their new radeonhd 7000 series GPU and APUs.
AMD dropped this a bit late due to insane internal review
processes, (please AMD just follow Intel and let open source guys
ship stuff early) however I don't want to penalise people who own
this hardware (since its been on sale for 3-4 months and GPU hw
doesn't exactly have a lifetime in years) and consign them to
using closed drivers for longer than necessary. The changes are
well contained and just plug into the driver new gpu functionality
so they should be fairly regression proof. I just want to give
them a bit of a run on the hw AMD kindly sent me.
b) drm prime/dma-buf interface code. This is just infrastructure
code to expose the dma-buf stuff to drm drivers and to userspace.
I'm not planning on pushing any driver support in this cycle
(except maybe exynos), but I'd like to get the infrastructure code
in so for the next cycle I can start getting the driver support
into the individual drivers. We have started driver support for
i915, nouveau and udl along with I think exynos and omap in
staging. However this code relies on the dma-buf tree being
pulled into your tree first since it needs the latest interfaces
from that tree. I'll push to get that tree sent asap.
(oh and any warnings you see in i915 are gcc's fault from what anyone
can see)."
Fix up trivial conflicts in arch/x86/platform/mrst/mrst.c due to the new
msic_thermal_platform_data() thermal function being added next to the
tc35876x_platform_data() i2c device function..
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (326 commits)
drm/i915: use DDC_ADDR instead of hard-coding it
drm/radeon: use DDC_ADDR instead of hard-coding it
drm: remove unneeded redefinition of DDC_ADDR
drm/exynos: added virtual display driver.
drm: allow loading an EDID as firmware to override broken monitor
drm/exynos: enable hdmi audio feature
drm/exynos: add default pixel format for plane
drm/exynos: cleanup exynos_hdmi.h
drm/exynos: add is_local member in exynos_drm_subdrv struct
drm/exynos: add subdrv open/close functions
drm/exynos: remove module of exynos drm subdrv
drm/exynos: release pending pageflip events when closed
drm/exynos: added new funtion to get/put dma address.
drm/exynos: update gem and buffer framework.
drm/exynos: added mode_fixup feature and code clean.
drm/exynos: add HDMI version 1.4 support
drm/exynos: remove exynos_mixer.h
gma500: Fix mmap frambuffer
drm/radeon: Drop radeon_gem_object_(un)pin.
drm/radeon: Restrict offset for legacy display engine.
...
Linus Torvalds [Thu, 22 Mar 2012 20:00:13 +0000 (13:00 -0700)]
Merge tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull updates of sound stuff from Takashi Iwai:
"Here is the first big update chunk of sound stuff for 3.4-rc1.
In the common sound infrastructure, there are a few changes for
dynamic PCM support (used in ASoC) and a few clean-ups. Majority of
changes are found, as usual, in HD-audio and ASoC.
Some highlights of HD-audio changes:
- All the long-standing static quirk codes for Realtek codec were
finally removed by fixing and extending the Realtek auto-parser.
- The mute-LED control is standardized over all HD-audio codec
drivers using the extended vmaster hook.
- The vmaster slave mixer elements are initialized to 0dB as default
so that the user won't be annoyed by the silent output after
updates, e.g. due to the additions of new elements.
- Other many fix-ups for the misc HD-audio devices.
In the ASoC side, this is a very active release, including a quite a
few framework enhancements. Some highlights:
- Support for widgets not associated with a CODEC, an important part
of the dynamic PCM framework.
- A library factoring out the common code shared by dmaengine based
DMA drivers contributed by Lars-Peter Clausen. This will save a
lot of code and make it much easier to deploy enhancements to
dmaengine.
- Support for binary controls, used for providing runtime
configuration of algorithm coefficients.
- A new DAPM widget type for regulator supplies allowing drivers for
devices that can power down unused supplies while active to do
without any per-driver code.
- DAPM widgets for DAIs, initially giving a speed boost for playback
startup and shutdown and also the basis for CODEC<->CODEC DAI link
support.
- Support for specifying the number of significant bits on audio
interfaces, useful for allowing applications to know how much
effort to put into generating data for a larger sample format.
- Conversion of the FSI driver used on some SH processors to
DMAEngine.
- Conversion of EP93xx drivers to DMAEngine.
- New CODEC drivers for Maxim MAX9768 and Wolfson Microelectronics
WM2200.
- Move audmux driver from arc/arm to sound/soc
- McBSP move from arch/ to sound/ and updates
Also, a few small updates and fixes for other drivers like au88x0,
ymfpci, USB 6fire, USB usx2yaudio are included."
* tag 'sound-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (446 commits)
ASoC: wm8994: Provide VMID mode control and fix default sequence
ASoC: wm8994: Add missing break in resume
ASoC: wm_hubs: Don't actively manage LINEOUT_VMID_BUF
ASoC: pxa-ssp: atomically set stream active masks
ASoC: fsl: p1022ds: tell the WM8776 codec driver that it's the master
ASoC: Samsung: Added to support mono recording
ALSA: hda - Fix build with CONFIG_PM=n
ALSA: au88x0 - Avoid possible Oops at unbinding
ALSA: usb-audio - Fix build error by consitification of rate list
ASoC: core: Fix obscure leak of runtime array
ALSA: pcm - Avoid GFP_ATOMIC in snd_pcm_link()
ALSA: pcm: Constify the list in snd_pcm_hw_constraint_list
ASoC: wm8996: Add 44.1kHz support
ALSA: hda - Fix build of patch_sigmatel.c without CONFIG_SND_HDA_POWER_SAVE
ASoC: mx27vis-aic32x4: Convert it to platform driver
ALSA: hda - fix printing of high HDMI sample rates
ALSA: ymfpci - Fix legacy registers on S3/S4 resume
ALSA: control - Fixe a trailing white space error
ALSA: hda - Add expose_enum_ctl flag to snd_hda_add_vmaster_hook()
ALSA: hda - Add "Mute-LED Mode" enum control
...
Linus Torvalds [Thu, 22 Mar 2012 19:55:29 +0000 (12:55 -0700)]
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
SCSI updates from James Bottomley:
"The update includes the usual assortment of driver updates (lpfc,
qla2xxx, qla4xxx, bfa, bnx2fc, bnx2i, isci, fcoe, hpsa) plus a huge
amount of infrastructure work in the SAS library and transport class
as well as an iSCSI update. There's also a new SCSI based virtio
driver."
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (177 commits)
[SCSI] qla4xxx: Update driver version to 5.02.00-k15
[SCSI] qla4xxx: trivial cleanup
[SCSI] qla4xxx: Fix sparse warning
[SCSI] qla4xxx: Add support for multiple session per host.
[SCSI] qla4xxx: Export CHAP index as sysfs attribute
[SCSI] scsi_transport: Export CHAP index as sysfs attribute
[SCSI] qla4xxx: Add support to display CHAP list and delete CHAP entry
[SCSI] iscsi_transport: Add support to display CHAP list and delete CHAP entry
[SCSI] pm8001: fix endian issue with code optimization.
[SCSI] pm8001: Fix possible racing condition.
[SCSI] pm8001: Fix bogus interrupt state flag issue.
[SCSI] ipr: update PCI ID definitions for new adapters
[SCSI] qla2xxx: handle default case in qla2x00_request_firmware()
[SCSI] isci: improvements in driver unloading routine
[SCSI] isci: improve phy event warnings
[SCSI] isci: debug, provide state-enum-to-string conversions
[SCSI] scsi_transport_sas: 'enable' phys on reset
[SCSI] libsas: don't recover end devices attached to disabled phys
[SCSI] libsas: fixup target_port_protocols for expanders that don't report sata
[SCSI] libsas: set attached device type and target protocols for local phys
...
Linus Torvalds [Thu, 22 Mar 2012 19:38:04 +0000 (12:38 -0700)]
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger:
"This contains the usual set of updates and bugfixes to target-core +
existing fabric module code, along with a handful of the patches
destined for v3.3 stable.
It also contains the necessary target-core infrastructure pieces
required to run using tcm_qla2xxx.ko WWPNs with the new Qlogic Fibre
Channel fabric module currently queued in target-pending/for-next-merge,
and coming for round 2.
The highlights for this series include:
- Add target_submit_tmr() helper function for fabric task management
(andy)
- Convert tcm_fc to use target_submit_tmr() (andy)
- Replace target core various cmd flags with a transport state (hch)
- Convert loopback to use workqueue submission (hch)
- Convert target core to use array_zalloc for tpg_lun_list (joern)
- Convert target core to use array_zalloc for device_list (joern)
- Add target core support for TMR_ABORT_TASK (nab)
- Add target core se_sess->sess_kref + get/put helpers (nab)
- Add target core se_node_acl->acl_kref for ->acl_free_comp usage
(nab)
- Convert iscsi-target to use target_put_session + sess_kref (nab)
- Fix tcm_fc fc_exch memory leak in ft_send_resp_status (nab)
- Fix ib_srpt srpt_handle_cmd send_ioctx->ioctx_kref leak on
exception (nab)
- Fix target core up handling of short INQUIRY buffers (roland)
- Untangle target-core front-end and back-end meanings of max_sectors
attribute (roland)
- Set loopback residual field for SCSI commands (roland)
- Fix target-core 16-bit target ports for SET TARGET PORT GROUPS
emulation (roland)
Thanks again to Andy, Christoph, Joern, Roland, and everyone who has
contributed this round!"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (64 commits)
ib_srpt: Fix srpt_handle_cmd send_ioctx->ioctx_kref leak on exception
loopback: Fix transport_generic_allocate_tasks error handling
iscsi-target: remove improper externs
iscsi-target: Remove unused variables in iscsi_target_parameters.c
target: remove obvious warnings
target: Use array_zalloc for device_list
target: Use array_zalloc for tpg_lun_list
target: Fix sense code for unsupported SERVICE ACTION IN
target: Remove hack to make READ CAPACITY(10) lie if thin provisioning is enabled
target: Bump core version to v4.1.0-rc2-ml + fabric versions
tcm_fc: Fix fc_exch memory leak in ft_send_resp_status
target: Drop unused legacy target_core_fabric_ops API callers
iscsi-target: Convert to use target_put_session + sess_kref
target: Convert se_node_acl->acl_group removal to use ->acl_kref
target: Add se_node_acl->acl_kref for ->acl_free_comp usage
target: Add se_node_acl->acl_free_comp for NodeACL release path
target: Add se_sess->sess_kref + get/put helpers
target: Convert session_lock to irqsave
target: Fix typo in drivers/target
iscsi-target: Fix dynamic -> explict NodeACL pointer reference
...
Linus Torvalds [Thu, 22 Mar 2012 19:29:50 +0000 (12:29 -0700)]
Merge tag 'md-3.4' of git://neil.brown.name/md
Pull md updates for 3.4 from Neil Brown:
"Mostly tidying up code in preparation for some bigger changes next
time.
A few bug fixes tagged for -stable.
Main functionality change is that some RAID10 arrays can now grow to
use extra space that may have been made available on the individual
devices."
Fixed up trivial conflicts with the k[un]map_atomic() cleanups in
drivers/md/bitmap.c.
* tag 'md-3.4' of git://neil.brown.name/md: (22 commits)
md: Add judgement bb->unacked_exist in function md_ack_all_badblocks().
md: fix clearing of the 'changed' flags for the bad blocks list.
md/bitmap: discard CHUNK_BLOCK_SHIFT macro
md/bitmap: remove unnecessary indirection when allocating.
md/bitmap: remove some pointless locking.
md/bitmap: change a 'goto' to a normal 'if' construct.
md/bitmap: move printing of bitmap status to bitmap.c
md/bitmap: remove some unused noise from bitmap.h
md/raid10 - support resizing some RAID10 arrays.
md/raid1: handle merge_bvec_fn in member devices.
md/raid10: handle merge_bvec_fn in member devices.
md: add proper merge_bvec handling to RAID0 and Linear.
md: tidy up rdev_for_each usage.
md/raid1,raid10: avoid deadlock during resync/recovery.
md/bitmap: ensure to load bitmap when creating via sysfs.
md: don't set md arrays to readonly on shutdown.
md: allow re-add to failed arrays.
md/raid5: use atomic_dec_return() instead of atomic_dec() and atomic_read().
md: Use existed macros instead of numbers
md/raid5: removed unused 'added_devices' variable.
...
Linus Torvalds [Thu, 22 Mar 2012 16:42:36 +0000 (09:42 -0700)]
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform changes from Ingo Molnar.
Removes the Moorestown platform that nobody ever used.
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/platform: Move APIC ID validity check into platform APIC code
x86/olpc/xo15/sci: Enable lid close wakeup control
x86/geode/net5501: Add platform driver for Soekris Engineering net5501
x86/geode/alix2: Supplement driver to include GPIO button support
x86/mid/powerbtn: Use MSIC read/write instead of ipc_scu
x86/mid/thermal: Turn off thermistor
x86/mid/thermal: Add msic_thermal alias
x86/mid/thermal: Convert to use Intel MSIC API
x86/mid/scu_ipc: Remove Moorestown support
x86/mid: Kill off Moorestown
x86/mrst: Add msic_thermal platform support
x86/config: Select MSIC MFD driver on Intel Medfield platform
x86/mid: Remove Intel Moorestown
x86/mrst: Set ISA bus type for fake MP IRQs
x86/ioapic: Use legacy_pic to set correct gsi-irq mapping
Linus Torvalds [Thu, 22 Mar 2012 16:42:04 +0000 (09:42 -0700)]
Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull MCE changes from Ingo Molnar.
* 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mce: Fix return value of mce_chrdev_read() when erst is disabled
x86/mce: Convert static array of pointers to per-cpu variables
x86/mce: Replace hard coded hex constants with symbolic defines
x86/mce: Recognise machine check bank signature for data path error
x86/mce: Handle "action required" errors
x86/mce: Add mechanism to safely save information in MCE handler
x86/mce: Create helper function to save addr/misc when needed
HWPOISON: Add code to handle "action required" errors.
HWPOISON: Clean up memory_failure() vs. __memory_failure()
Linus Torvalds [Thu, 22 Mar 2012 16:41:22 +0000 (09:41 -0700)]
Merge branch 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/fpu changes from Ingo Molnar.
* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
i387: Split up <asm/i387.h> into exported and internal interfaces
i387: Uninline the generic FP helpers that we expose to kernel modules
Linus Torvalds [Thu, 22 Mar 2012 16:28:15 +0000 (09:28 -0700)]
Merge branches 'x86-cpu-for-linus', 'x86-boot-for-linus', 'x86-cpufeature-for-linus', 'x86-process-for-linus' and 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull trivial x86 branches from Ingo Molnar: small one-liners to fix up
details.
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Remove some noise from boot log when starting cpus
* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, boot: Fix port argument to inl() function
* 'x86-cpufeature-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, cpufeature: Add CPU features from Intel document 319433-012A
* 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86_64: Record stack pointer before task execution begins
* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/UV: Lower UV rtc clocksource rating
Linus Torvalds [Thu, 22 Mar 2012 16:13:24 +0000 (09:13 -0700)]
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/asm changes from Ingo Molnar
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Include probe_roms.h in probe_roms.c
x86/32: Print control and debug registers for kerenel context
x86: Tighten dependencies of CPU_SUP_*_32
x86/numa: Improve internode cache alignment
x86: Fix the NMI nesting comments
x86-64: Improve insn scheduling in SAVE_ARGS_IRQ
x86-64: Fix CFI annotations for NMI nesting code
bitops: Add missing parentheses to new get_order macro
bitops: Optimise get_order()
bitops: Adjust the comment on get_order() to describe the size==0 case
x86/spinlocks: Eliminate TICKET_MASK
x86-64: Handle byte-wise tail copying in memcpy() without a loop
x86-64: Fix memcpy() to support sizes of 4Gb and above
x86-64: Fix memset() to support sizes of 4Gb and above
x86-64: Slightly shorten copy_page()
Linus Torvalds [Thu, 22 Mar 2012 16:04:48 +0000 (09:04 -0700)]
Merge branch 'akpm' (Andrew's patch-bomb)
Merge first batch of patches from Andrew Morton:
"A few misc things and all the MM queue"
* emailed from Andrew Morton <akpm@linux-foundation.org>: (92 commits)
memcg: avoid THP split in task migration
thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE
memcg: clean up existing move charge code
mm/memcontrol.c: remove unnecessary 'break' in mem_cgroup_read()
mm/memcontrol.c: remove redundant BUG_ON() in mem_cgroup_usage_unregister_event()
mm/memcontrol.c: s/stealed/stolen/
memcg: fix performance of mem_cgroup_begin_update_page_stat()
memcg: remove PCG_FILE_MAPPED
memcg: use new logic for page stat accounting
memcg: remove PCG_MOVE_LOCK flag from page_cgroup
memcg: simplify move_account() check
memcg: remove EXPORT_SYMBOL(mem_cgroup_update_page_stat)
memcg: kill dead prev_priority stubs
memcg: remove PCG_CACHE page_cgroup flag
memcg: let css_get_next() rely upon rcu_read_lock()
cgroup: revert ss_id_lock to spinlock
idr: make idr_get_next() good for rcu_read_lock()
memcg: remove unnecessary thp check in page stat accounting
memcg: remove redundant returns
memcg: enum lru_list lru
...
Dave Airlie [Thu, 22 Mar 2012 14:44:06 +0000 (14:44 +0000)]
Merge branch 'drm-nouveau-next' of git://git.freedesktop.org/git/nouveau/linux-2.6 into drm-next
* 'drm-nouveau-next' of git://git.freedesktop.org/git/nouveau/linux-2.6:
drm/nouveau/dp: support version 4.0 of DP table
drm/nve0/disp: nvidia randomly decided to move the dithering method
drm/nve0: initial modesetting support for kepler chipsets
drm/nouveau: add bios connector type for dms59
drm/nouveau: move out of staging drivers
drm/nouveau: bump version to 1.0.0
drm/nvd0/disp: ignore clock set if no pclk
drm/nouveau: oops, increase channel dispc_vma to 4
drm/nouveau: inform userspace of new kernel subchannel requirements
drm/nouveau: remove m2mf creation on userspace channels
drm/nvc0-/disp: reimplement flip completion method as fifo method
drm/nouveau: move fence sequence check to start of loop
drm/nouveau: remove subchannel names from places where it doesn't matter
drm/nouveau/ttm: always do buffer moves on kernel channel
Ben Skeggs [Fri, 16 Mar 2012 02:44:34 +0000 (12:44 +1000)]
drm/nouveau: bump version to 1.0.0
The time has come to get a proper version number that we can change to
indicate new features etc, rather than the lock-step 0.0.XX that we
previously had.
libdrm has recognised this version as compatible with 0.0.16 since 2.4.22,
so hopefully any breakage people see should be very minimal.
Ben Skeggs [Wed, 21 Mar 2012 03:57:40 +0000 (13:57 +1000)]
drm/nouveau: inform userspace of new kernel subchannel requirements
All available subchannels are now available for userspace to do with as it
pleases on NVC0+.
On all earlier chipsets, the kernel still uses a software object on subc 0
to implement the page flip completion method. I hope to find some decent
way of addressing this too, but it's a tad tricker prior to fermi.
Ben Skeggs [Fri, 16 Mar 2012 02:40:17 +0000 (12:40 +1000)]
drm/nouveau/ttm: always do buffer moves on kernel channel
There was once good reasons for wanting the drm to be able to use M2MF etc
on user channels, but they're not relevant anymore. For the general
buffer move case, we've already lost by transferring between vram/sysmem
already so the context switching overhead is minimal in comparison.
Linus Torvalds [Thu, 22 Mar 2012 01:55:10 +0000 (18:55 -0700)]
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc merge from Benjamin Herrenschmidt:
"Here's the powerpc batch for this merge window. It is going to be a
bit more nasty than usual as in touching things outside of
arch/powerpc mostly due to the big iSeriesectomy :-) We finally got
rid of the bugger (legacy iSeries support) which was a PITA to
maintain and that nobody really used anymore.
Here are some of the highlights:
- Legacy iSeries is gone. Thanks Stephen ! There's still some bits
and pieces remaining if you do a grep -ir series arch/powerpc but
they are harmless and will be removed in the next few weeks
hopefully.
- The 'fadump' functionality (Firmware Assisted Dump) replaces the
previous (equivalent) "pHyp assisted dump"... it's a rewrite of a
mechanism to get the hypervisor to do crash dumps on pSeries, the
new implementation hopefully being much more reliable. Thanks
Mahesh Salgaonkar.
- The "EEH" code (pSeries PCI error handling & recovery) got a big
spring cleaning, motivated by the need to be able to implement a
new backend for it on top of some new different type of firwmare.
The work isn't complete yet, but a good chunk of the cleanups is
there. Note that this adds a field to struct device_node which is
not very nice and which Grant objects to. I will have a patch soon
that moves that to a powerpc private data structure (hopefully
before rc1) and we'll improve things further later on (hopefully
getting rid of the need for that pointer completely). Thanks Gavin
Shan.
- I dug into our exception & interrupt handling code to improve the
way we do lazy interrupt handling (and make it work properly with
"edge" triggered interrupt sources), and while at it found & fixed
a wagon of issues in those areas, including adding support for page
fault retry & fatal signals on page faults.
- Your usual random batch of small fixes & updates, including a bunch
of new embedded boards, both Freescale and APM based ones, etc..."
I fixed up some conflicts with the generalized irq-domain changes from
Grant Likely, hopefully correctly.
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (141 commits)
powerpc/ps3: Do not adjust the wrapper load address
powerpc: Remove the rest of the legacy iSeries include files
powerpc: Remove the remaining CONFIG_PPC_ISERIES pieces
init: Remove CONFIG_PPC_ISERIES
powerpc: Remove FW_FEATURE ISERIES from arch code
tty/hvc_vio: FW_FEATURE_ISERIES is no longer selectable
powerpc/spufs: Fix double unlocks
powerpc/5200: convert mpc5200 to use of_platform_populate()
powerpc/mpc5200: add options to mpc5200_defconfig
powerpc/mpc52xx: add a4m072 board support
powerpc/mpc5200: update mpc5200_defconfig to fit for charon board
Documentation/powerpc/mpc52xx.txt: Checkpatch cleanup
powerpc/44x: Add additional device support for APM821xx SoC and Bluestone board
powerpc/44x: Add support PCI-E for APM821xx SoC and Bluestone board
MAINTAINERS: Update PowerPC 4xx tree
powerpc/44x: The bug fixed support for APM821xx SoC and Bluestone board
powerpc: document the FSL MPIC message register binding
powerpc: add support for MPIC message register API
powerpc/fsl: Added aliased MSIIR register address to MSI node in dts
powerpc/85xx: mpc8548cds - add 36-bit dts
...
Linus Torvalds [Thu, 22 Mar 2012 01:17:51 +0000 (18:17 -0700)]
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
Pull m68knommu arch updates from Greg Ungerer:
"Includes a cleanup of the non-MMU linker script (it now almost
exclusively uses the well defined linker script support macros and
definitions). Some more merging of MMU and non-MMU common files
(specifically the arch process.c, ptrace and time.c). And a big
cleanup of the massively duplicated ColdFire device definition code.
Overall we remove about 2000 lines of code, and end up with a single
set of platform device definitions for the serial ports, ethernet
ports and QSPI ports common in most ColdFire SoCs.
I expect you will get a merge conflict on arch/m68k/kernel/process.c,
in cpu_idle(). It should be relatively strait forward to fixup."
And cpu_idle() conflict resolution was indeed trivial (merging the
nommu/mmu versions of process.c trivially conflicting with the
conversion to use the schedule_preempt_disabled() helper function)
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: (57 commits)
m68knommu: factor more common ColdFire cpu reset code
m68knommu: make 528x CPU reset register addressing consistent
m68knommu: make 527x CPU reset register addressing consistent
m68knommu: make 523x CPU reset register addressing consistent
m68knommu: factor some common ColdFire cpu reset code
m68knommu: move old ColdFire timers init from CPU init to timers code
m68knommu: clean up init code in ColdFire 532x startup
m68knommu: clean up init code in ColdFire 528x startup
m68knommu: clean up init code in ColdFire 523x startup
m68knommu: merge common ColdFire QSPI platform setup code
m68knommu: make 532x QSPI platform addressing consistent
m68knommu: make 528x QSPI platform addressing consistent
m68knommu: make 527x QSPI platform addressing consistent
m68knommu: make 5249 QSPI platform addressing consistent
m68knommu: make 523x QSPI platform addressing consistent
m68knommu: make 520x QSPI platform addressing consistent
m68knommu: merge common ColdFire FEC platform setup code
m68knommu: make 532x FEC platform addressing consistent
m68knommu: make 528x FEC platform addressing consistent
m68knommu: make 527x FEC platform addressing consistent
...
Jussi Kivilinna [Thu, 15 Mar 2012 20:11:57 +0000 (22:11 +0200)]
crypto: twofish-x86_64-3way - module init/exit functions should be static
This caused conflict with camellia-x86_64 when compiled into kernel, same
function names and not static.
Reported-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Jussi Kivilinna [Thu, 15 Mar 2012 20:11:51 +0000 (22:11 +0200)]
crypto: camellia-x86_64 - module init/exit functions should be static
This caused conflict with twofish-x86_64-3way when compiled into kernel,
same function names and not static.
Reported-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
* git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-nmw:
GFS2: Change truncate page allocation to be GFP_NOFS
GFS2: call gfs2_write_alloc_required for each chunk
GFS2: Clean up log flush header writing
GFS2: Remove a __GFP_NOFAIL allocation
GFS2: Flush pending glock work when evicting an inode
GFS2: make sure rgrps are up to date in func gfs2_blk2rgrpd
GFS2: Eliminate sd_rindex_mutex
GFS2: Unlock rindex mutex on glock error
GFS2: Make bd_cmp() static
GFS2: Sort the ordered write list
GFS2: FITRIM ioctl support
GFS2: Move two functions from log.c to lops.c
GFS2: glock statistics gathering
Naoya Horiguchi [Wed, 21 Mar 2012 23:34:28 +0000 (16:34 -0700)]
memcg: avoid THP split in task migration
Currently we can't do task migration among memory cgroups without THP
split, which means processes heavily using THP experience large overhead
in task migration. This patch introduces the code for moving charge of
THP and makes THP more valuable.
Naoya Horiguchi [Wed, 21 Mar 2012 23:34:27 +0000 (16:34 -0700)]
thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE
These macros will be used in a later patch, where all usages are expected
to be optimized away without #ifdef CONFIG_TRANSPARENT_HUGEPAGE. But to
detect unexpected usages, we convert the existing BUG() to BUILD_BUG().
[akpm@linux-foundation.org: fix build in mm/pgtable-generic.c] Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Hillf Danton <dhillf@gmail.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jeff Liu [Wed, 21 Mar 2012 23:34:27 +0000 (16:34 -0700)]
mm/memcontrol.c: remove unnecessary 'break' in mem_cgroup_read()
Signed-off-by: Jie Liu <jeff.liu@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
memcg: fix performance of mem_cgroup_begin_update_page_stat()
mem_cgroup_begin_update_page_stat() should be very fast because it's
called very frequently. Now, it needs to look up page_cgroup and its
memcg....this is slow.
This patch adds a global variable to check "any memcg is moving or not".
With this, the caller doesn't need to visit page_cgroup and memcg.
Here is a test result. A test program makes page faults onto a file,
MAP_SHARED and makes each page's page_mapcount(page) > 1, and free the
range by madvise() and page fault again. This program causes 26214400
times of page fault onto a file(size was 1G.) and shows shows the cost of
mem_cgroup_begin_update_page_stat().
Before this patch for mem_cgroup_begin_update_page_stat()
Now, page-stat-per-memcg is recorded into per page_cgroup flag by
duplicating page's status into the flag. The reason is that memcg has a
feature to move a page from a group to another group and we have race
between "move" and "page stat accounting",
Under current logic, assume CPU-A and CPU-B. CPU-A does "move" and CPU-B
does "page stat accounting".
When CPU-A goes 1st,
CPU-A CPU-B
update "struct page" info.
move_lock_mem_cgroup(memcg)
see pc->flags
copy page stat to new group
overwrite pc->mem_cgroup.
move_unlock_mem_cgroup(memcg)
move_lock_mem_cgroup(mem)
set pc->flags
update page stat accounting
move_unlock_mem_cgroup(mem)
stat accounting is guarded by move_lock_mem_cgroup() and "move" logic
(CPU-A) doesn't see changes in "struct page" information.
But it's costly to have the same information both in 'struct page' and
'struct page_cgroup'. And, there is a potential problem.
For example, assume we have PG_dirty accounting in memcg.
PG_..is a flag for struct page.
PCG_ is a flag for struct page_cgroup.
(This is just an example. The same problem can be found in any
kind of page stat accounting.)
CPU-A CPU-B
TestSet PG_dirty
(delay) TestClear PG_dirty
if (TestClear(PCG_dirty))
memcg->nr_dirty--
if (TestSet(PCG_dirty))
memcg->nr_dirty++
Here, memcg->nr_dirty = +1, this is wrong. This race was reported by Greg
Thelen <gthelen@google.com>. Now, only FILE_MAPPED is supported but
fortunately, it's serialized by page table lock and this is not real bug,
_now_,
If this potential problem is caused by having duplicated information in
struct page and struct page_cgroup, we may be able to fix this by using
original 'struct page' information. But we'll have a problem in "move
account"
accounting information may be double-counted. This was original reason to
have PCG_xxx flags but it seems PCG_xxx has another problem.
I think we need a bigger lock as
move_lock_mem_cgroup(page)
TestSetPageDirty(page)
update page stats (without any checks)
move_unlock_mem_cgroup(page)
This fixes both of problems and we don't have to duplicate page flag into
page_cgroup. Please note: move_lock_mem_cgroup() is held only when there
are possibility of "account move" under the system. So, in most path,
status update will go without atomic locks.
This patch introduces mem_cgroup_begin_update_page_stat() and
mem_cgroup_end_update_page_stat() both should be called at modifying
'struct page' information if memcg takes care of it. as
mem_cgroup_begin_update_page_stat()
modify page information
mem_cgroup_update_page_stat()
=> never check any 'struct page' info, just update counters.
mem_cgroup_end_update_page_stat().
This patch is slow because we need to call begin_update_page_stat()/
end_update_page_stat() regardless of accounted will be changed or not. A
following patch adds an easy optimization and reduces the cost.
[akpm@linux-foundation.org: s/lock/locked/]
[hughd@google.com: fix deadlock by avoiding stat lock when anon] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Greg Thelen <gthelen@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Ying Han <yinghan@google.com> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
PCG_MOVE_LOCK is used for bit spinlock to avoid race between overwriting
pc->mem_cgroup and page statistics accounting per memcg. This lock helps
to avoid the race but the race is very rare because moving tasks between
cgroup is not a usual job. So, it seems using 1bit per page is too
costly.
This patch changes this lock as per-memcg spinlock and removes
PCG_MOVE_LOCK.
If smaller lock is required, we'll be able to add some hashes but I'd like
to start from this.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Greg Thelen <gthelen@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Ying Han <yinghan@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We record 'the page is cache' with the PCG_CACHE bit in page_cgroup.
Here, "CACHE" means anonymous user pages (and SwapCache). This doesn't
include shmem.
Considering callers, at charge/uncharge, the caller should know what the
page is and we don't need to record it by using one bit per page.
This patch removes PCG_CACHE bit and make callers of
mem_cgroup_charge_statistics() to specify what the page is.
About page migration: Mapping of the used page is not touched during migra
tion (see page_remove_rmap) so we can rely on it and push the correct
charge type down to __mem_cgroup_uncharge_common from end_migration for
unused page. The force flag was misleading was abused for skipping the
needless page_mapped() / PageCgroupMigration() check, as we know the
unused page is no longer mapped and cleared the migration flag just a few
lines up. But doing the checks is no biggie and it's not worth adding
another flag just to skip them.
[akpm@linux-foundation.org: checkpatch fixes]
[hughd@google.com: fix PageAnon uncharging] Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Hugh Dickins <hughd@google.com> Cc: Ying Han <yinghan@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Wed, 21 Mar 2012 23:34:21 +0000 (16:34 -0700)]
memcg: let css_get_next() rely upon rcu_read_lock()
Remove lock and unlock around css_get_next()'s call to idr_get_next().
memcg iterators (only users of css_get_next) already did rcu_read_lock(),
and its comment demands that; but add a WARN_ON_ONCE to make sure of it.
Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Wed, 21 Mar 2012 23:34:21 +0000 (16:34 -0700)]
cgroup: revert ss_id_lock to spinlock
Commit c1e2ee2dc436 ("memcg: replace ss->id_lock with a rwlock") has now
been seen to cause the unfair behavior we should have expected from
converting a spinlock to an rwlock: softlockup in cgroup_mkdir(), whose
get_new_cssid() is waiting for the wlock, while there are 19 tasks using
the rlock in css_get_next() to get on with their memcg workload (in an
artificial test, admittedly). Yet lib/idr.c was made suitable for RCU
way back: revert that commit, restoring ss->id_lock to a spinlock.
Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Wed, 21 Mar 2012 23:34:20 +0000 (16:34 -0700)]
idr: make idr_get_next() good for rcu_read_lock()
Make one small adjustment to idr_get_next(): take the height from the top
layer (stable under RCU) instead of from the root (unprotected by RCU), as
idr_find() does: so that it can be used with RCU locking. Copied comment
on RCU locking from idr_find().
Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
memcg: remove unnecessary thp check in page stat accounting
Commit e94c8a9cbce1 ("memcg: make mem_cgroup_split_huge_fixup() more
efficient") removed move_lock_page_cgroup(). So we do not have to check
PageTransHuge in mem_cgroup_update_page_stat() and fallback into the
locked accounting because both move_account() and thp split are done
with compound_lock so they cannot race.
The race between update vs. move is protected by mem_cgroup_stealed.
PageTransHuge pages shouldn't appear in this code path currently because
we are tracking only file pages at the moment but later we are planning
to track also other pages (e.g. mlocked ones).
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Reviewed-by: Acked-by: Michal Hocko <mhocko@suse.cz> Cc: David Rientjes <rientjes@google.com> Acked-by: Ying Han<yinghan@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Wed, 21 Mar 2012 23:34:19 +0000 (16:34 -0700)]
memcg: lru_size instead of MEM_CGROUP_ZSTAT
I never understood why we need a MEM_CGROUP_ZSTAT(mz, idx) macro to
obscure the LRU counts. For easier searching? So call it lru_size
rather than bare count (lru_length sounds better, but would be wrong,
since each huge page raises lru_size hugely).
Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Kirill A. Shutemov <kirill@shutemov.name> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Shaohua Li [Wed, 21 Mar 2012 23:34:17 +0000 (16:34 -0700)]
swap: don't do discard if no discard option added
When swapon() was not passed the SWAP_FLAG_DISCARD option, sys_swapon()
will still perform a discard operation. This can cause problems if
discard is slow or buggy.
Reverse the order of the check so that a discard operation is performed
only if the sys_swapon() caller is attempting to enable discard.
Reset the reclaim mode in shrink_active_list() to RECLAIM_MODE_SINGLE |
RECLAIM_MODE_ASYNC. (sync/async sign is used only in shrink_page_list
and does not affect shrink_active_list)
Currenly shrink_active_list() sometimes works in lumpy-reclaim mode, if
RECLAIM_MODE_LUMPYRECLAIM is left over from an earlier
shrink_inactive_list(). Meanwhile, in age_active_anon()
sc->reclaim_mode is totally zero. So the current behavior is too
complex and confusing, and this looks like bug.
In general, shrink_active_list() populates the inactive list for the
next shrink_inactive_list(). Lumpy shring_inactive_list() isolates
pages around the chosen one from both the active and inactive lists.
So, there is no reason for lumpy isolation in shrink_active_list().
See also: https://lkml.org/lkml/2012/3/15/583
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Proposed-by: Hugh Dickins <hughd@google.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kautuk Consul [Wed, 21 Mar 2012 23:34:16 +0000 (16:34 -0700)]
mmap.c: fix comment for __insert_vm_struct()
The comment above __insert_vm_struct seems to suggest that this function
is also going to link the VMA with the anon_vma, but this is not true.
This function only links the VMA to the mm->mm_rb tree and the mm->mmap
linked list.
[akpm@linux-foundation.org: improve comment layout and text] Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Steven Truelove [Wed, 21 Mar 2012 23:34:14 +0000 (16:34 -0700)]
hugetlbfs: fix alignment of huge page requests
When calling shmget() with SHM_HUGETLB, shmget aligns the request size to
PAGE_SIZE, but this is not sufficient.
Modify hugetlb_file_setup() to align requests to the huge page size, and
to accept an address argument so that all alignment checks can be
performed in hugetlb_file_setup(), rather than in its callers. Change
newseg() and mmap_pgoff() to match the new prototype and eliminate a now
redundant alignment check.
[akpm@linux-foundation.org: fix build] Signed-off-by: Steven Truelove <steven.truelove@utoronto.ca> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Rientjes [Wed, 21 Mar 2012 23:34:13 +0000 (16:34 -0700)]
mm, hugetlb: add thread name and pid to SHM_HUGETLB mlock rlimit warning
Add the thread name and pid of the application that is allocating shm
segments with MAP_HUGETLB without being a part of
/proc/sys/vm/hugetlb_shm_group or having CAP_IPC_LOCK.
This identifies the application so it may be fixed by avoiding using the
deprecated exception (see Documentation/feature-removal-schedule.txt).
Signed-off-by: David Rientjes <rientjes@google.com> Cc: Dave Jones <davej@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Rientjes [Wed, 21 Mar 2012 23:34:13 +0000 (16:34 -0700)]
mm, counters: remove task argument to sync_mm_rss() and __sync_task_rss_stat()
sync_mm_rss() can only be used for current to avoid race conditions in
iterating and clearing its per-task counters. Remove the task argument
for it and its helper function, __sync_task_rss_stat(), to avoid thinking
it can be used safely for anything other than current.
Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Gibson [Wed, 21 Mar 2012 23:34:12 +0000 (16:34 -0700)]
hugepages: fix use after free bug in "quota" handling
hugetlbfs_{get,put}_quota() are badly named. They don't interact with the
general quota handling code, and they don't much resemble its behaviour.
Rather than being about maintaining limits on on-disk block usage by
particular users, they are instead about maintaining limits on in-memory
page usage (including anonymous MAP_PRIVATE copied-on-write pages)
associated with a particular hugetlbfs filesystem instance.
Worse, they work by having callbacks to the hugetlbfs filesystem code from
the low-level page handling code, in particular from free_huge_page().
This is a layering violation of itself, but more importantly, if the
kernel does a get_user_pages() on hugepages (which can happen from KVM
amongst others), then the free_huge_page() can be delayed until after the
associated inode has already been freed. If an unmount occurs at the
wrong time, even the hugetlbfs superblock where the "quota" limits are
stored may have been freed.
Andrew Barry proposed a patch to fix this by having hugepages, instead of
storing a pointer to their address_space and reaching the superblock from
there, had the hugepages store pointers directly to the superblock,
bumping the reference count as appropriate to avoid it being freed.
Andrew Morton rejected that version, however, on the grounds that it made
the existing layering violation worse.
This is a reworked version of Andrew's patch, which removes the extra, and
some of the existing, layering violation. It works by introducing the
concept of a hugepage "subpool" at the lower hugepage mm layer - that is a
finite logical pool of hugepages to allocate from. hugetlbfs now creates
a subpool for each filesystem instance with a page limit set, and a
pointer to the subpool gets added to each allocated hugepage, instead of
the address_space pointer used now. The subpool has its own lifetime and
is only freed once all pages in it _and_ all other references to it (i.e.
superblocks) are gone.
subpools are optional - a NULL subpool pointer is taken by the code to
mean that no subpool limits are in effect.
Previous discussion of this bug found in: "Fix refcounting in hugetlbfs
quota handling.". See: https://lkml.org/lkml/2011/8/11/28 or
http://marc.info/?l=linux-mm&m=126928970510627&w=1
v2: Fixed a bug spotted by Hillf Danton, and removed the extra parameter to
alloc_huge_page() - since it already takes the vma, it is not necessary.
Signed-off-by: Andrew Barry <abarry@cray.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Cc: Hugh Dickins <hughd@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Gibson [Wed, 21 Mar 2012 23:34:12 +0000 (16:34 -0700)]
hugetlb: cleanup hugetlb.h
Make a couple of small cleanups to linux/include/hugetlb.h. The
set_file_hugepages() function, which was not used anywhere is removed,
and the hugetlbfs_config and hugetlbfs_inode_info structures with its
HUGETLBFS_I helper function are moved into inode.c, the only place they
were used.
These structures are really linked to the hugetlbfs filesystem
specifically not to hugepage mm handling in general, so they belong in
the filesystem code not in a generally available header.
It would be nice to move the hugetlbfs_sb_info (superblock) structure in
there as well, but it's currently needed in a number of places via the
hstate_vma() and hstate_inode().
Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Cc: Hugh Dickins <hughd@google.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Andrew Barry <abarry@cray.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Hillf Danton <dhillf@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bob Liu [Wed, 21 Mar 2012 23:34:11 +0000 (16:34 -0700)]
ksm: cleanup: introduce find_mergeable_vma()
There are multiple places which perform the same check. Add a new
find_mergeable_vma() to handle this.
Signed-off-by: Bob Liu <lliubbo@gmail.com> Acked-by: Hugh Dickins <hughd@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mel Gorman [Wed, 21 Mar 2012 23:34:11 +0000 (16:34 -0700)]
cpuset: mm: reduce large amounts of memory barrier related damage v3
Commit c0ff7453bb5c ("cpuset,mm: fix no node to alloc memory when
changing cpuset's mems") wins a super prize for the largest number of
memory barriers entered into fast paths for one commit.
[get|put]_mems_allowed is incredibly heavy with pairs of full memory
barriers inserted into a number of hot paths. This was detected while
investigating at large page allocator slowdown introduced some time
after 2.6.32. The largest portion of this overhead was shown by
oprofile to be at an mfence introduced by this commit into the page
allocator hot path.
For extra style points, the commit introduced the use of yield() in an
implementation of what looks like a spinning mutex.
This patch replaces the full memory barriers on both read and write
sides with a sequence counter with just read barriers on the fast path
side. This is much cheaper on some architectures, including x86. The
main bulk of the patch is the retry logic if the nodemask changes in a
manner that can cause a false failure.
While updating the nodemask, a check is made to see if a false failure
is a risk. If it is, the sequence number gets bumped and parallel
allocators will briefly stall while the nodemask update takes place.
In a page fault test microbenchmark, oprofile samples from
__alloc_pages_nodemask went from 4.53% of all samples to 1.15%. The
actual results were
The overall improvement is small but the System CPU time is much
improved and roughly in correlation to what oprofile reported (these
performance figures are without profiling so skew is expected). The
actual number of page faults is noticeably improved.
For benchmarks like kernel builds, the overall benefit is marginal but
the system CPU time is slightly reduced.
To test the actual bug the commit fixed I opened two terminals. The
first ran within a cpuset and continually ran a small program that
faulted 100M of anonymous data. In a second window, the nodemask of the
cpuset was continually randomised in a loop.
Without the commit, the program would fail every so often (usually
within 10 seconds) and obviously with the commit everything worked fine.
With this patch applied, it also worked fine so the fix should be
functionally equivalent.
Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: Miao Xie <miaox@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Christoph Lameter <cl@linux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Rientjes [Wed, 21 Mar 2012 23:34:10 +0000 (16:34 -0700)]
mm, memcg: pass charge order to oom killer
The oom killer typically displays the allocation order at the time of oom
as a part of its diangostic messages (for global, cpuset, and mempolicy
ooms).
The memory controller may also pass the charge order to the oom killer so
it can emit the same information. This is useful in determining how large
the memory allocation is that triggered the oom killer.
Signed-off-by: David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Balbir Singh <bsingharora@gmail.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Andi Kleen [Wed, 21 Mar 2012 23:34:09 +0000 (16:34 -0700)]
mm: update stale lock ordering comment for memory-failure.c
When i_mmap_lock changed to a mutex the locking order in memory failure
was changed to take the sleeping lock first. But the big fat mm lock
ordering comment (BFMLO) wasn't updated. Do this here.
Pointed out by Andrew.
Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fengguang Wu [Wed, 21 Mar 2012 23:34:09 +0000 (16:34 -0700)]
mm: use global_dirty_limit in throttle_vm_writeout()
When starting a memory hog task, a desktop box w/o swap is found to go
unresponsive for a long time. It's solely caused by lots of congestion
waits in throttle_vm_writeout():
The root cause is, the dirty threshold is knocked down a lot by the memory
hog task. Fixed by using global_dirty_limit which decreases gradually on
such events and can guarantee we stay above (the also decreasing) nr_dirty
in the progress of following down to the new dirty threshold.
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Jan Kara <jack@suse.cz> Cc: Greg Thelen <gthelen@google.com> Cc: Ying Han <yinghan@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Fengguang Wu [Wed, 21 Mar 2012 23:34:08 +0000 (16:34 -0700)]
mm: don't set __GFP_WRITE on ramfs/sysfs writes
There is not much point in skipping zones during allocation based on the
dirty usage which they'll never contribute to. And we'd like to avoid
page reclaim waits when writing to ramfs/sysfs etc.
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Jan Kara <jack@suse.cz> Cc: Greg Thelen <gthelen@google.com> Cc: Ying Han <yinghan@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Acked-by: Minchan Kim <minchan.kim@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / linux-beck.git / log