Lin Ming [Thu, 12 Jan 2012 05:10:32 +0000 (13:10 +0800)]
ACPICA: Add support for region address conflict checking
Allows drivers to determine if any memory or I/O addresses
will conflict with addresses used by ACPI operation regions.
Introduces a new interface, acpi_check_address_range.
Reported-and-tested-by: Luca Tettamanti <kronos.it@gmail.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Zhang Rui [Wed, 16 Nov 2011 09:03:54 +0000 (17:03 +0800)]
ACPI 5.0: Allow _AEI method in walk resources
_AEI contains a resource template, this change adds support for
the walk resources function.
Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Bob Moore [Wed, 16 Nov 2011 02:57:28 +0000 (10:57 +0800)]
ACPI 5.0: Implement hardware-reduced option
If HW-reduced flag is set in the FADT, do not attempt to access
or initialize any ACPI hardware, including SCI and global lock.
No FACS will be present.
Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
For above ASL code, we need to save scope node(\_SB) to lookup
the argument node(\_SB.RAMB).
Reported-by: Jim Green <student.northwestern@gmail.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Lin Ming [Tue, 29 Nov 2011 14:13:35 +0000 (22:13 +0800)]
ACPICA: Put back the call to acpi_os_validate_address
The call to acpi_os_validate_address in acpi_ds_get_region_arguments was
removed by mistake in commit 9ad19ac(ACPICA: Split large dsopcode and
dsload.c files).
Put it back.
Cc: stable@vger.kernel.org # 2.6.38+ Reported-and-bisected-by: Luca Tettamanti <kronos.it@gmail.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Cliff Wickman [Mon, 16 Jan 2012 21:21:46 +0000 (15:21 -0600)]
x86/UV2: Ack BAU interrupt earlier
This patch moves the ack of the BAU interrupt to the beginning
of the interrupt handler so that there is less possibility of a
lost interrupt and slower response to a shootdown message.
Cliff Wickman [Mon, 16 Jan 2012 21:20:50 +0000 (15:20 -0600)]
x86/UV2: Remove stale no-resources test for UV2 BAU
This patch removes an unnecessary test for a
no-destination-resources-available condition that looks like a
destination timeout in UV1, but is separately distinguishable in
UV2.
Cliff Wickman [Mon, 16 Jan 2012 21:19:47 +0000 (15:19 -0600)]
x86/UV2: Work around BAU bug
This patch implements a workaround for a UV2 hardware bug.
The bug is a non-atomic update of a memory-mapped register. When
hardware message delivery and software message acknowledge occur
simultaneously the pending message acknowledge for the arriving
message may be lost. This causes the sender's message status to
stay busy.
Part of the workaround is to not acknowledge a completed message
until it is verified that no other message is actually using the
resource that is mistakenly recorded in the completed message.
Part of the workaround is to test for long elapsed time in such
a busy condition, then handle it by using a spare sending
descriptor. The stay-busy condition is eventually timed out by
hardware, and then the original sending descriptor can be
re-used. Most of that logic change is in keeping track of the
current descriptor and the state of the spares.
The occurrences of the workaround are added to the BAU
statistics.
Olof Johansson [Tue, 17 Jan 2012 06:46:19 +0000 (22:46 -0800)]
Merge branch 'samsung-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes
* 'samsung-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
ARM: EXYNOS: Invert VCLK polarity for framebuffer on ORIGEN
ARM: S3C64XX: Fix interrupt configuration for PCA935x on Cragganmore
ARM: S3C64XX: Fix the memory mapped GPIOs on Cragganmore
ARM: S3C64XX: Remove hsmmc1 from Cragganmore
ARM: S3C64XX: Remove unconditional power domain disables
ARM: SAMSUNG: Declare struct platform_device in plat/s3c64xx-spi.h
ARM: SAMSUNG: dma-ops.h needs mach/dma.h
ARM: SAMSUNG: Guard against multiple inclusion of plat/dma.h
Linus Torvalds [Tue, 17 Jan 2012 02:23:09 +0000 (18:23 -0800)]
Merge branch 'x86/rdrand' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86/rdrand' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
random: Adjust the number of loops when initializing
random: Use arch-specific RNG to initialize the entropy store
Linus Torvalds [Tue, 17 Jan 2012 02:19:19 +0000 (18:19 -0800)]
Merge branch 'x86-syscall-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86-syscall-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Move <asm/asm-offsets.h> from trace_syscalls.c to asm/syscall.h
x86, um: Fix typo in 32-bit system call modifications
um: Use $(srctree) not $(KBUILD_SRC)
x86, um: Mark system call tables readonly
x86, um: Use the same style generated syscall tables as native
um: Generate headers before generating user-offsets.s
um: Run host archheaders, allow use of host generated headers
kbuild, headers.sh: Don't make archheaders explicitly
x86, syscall: Allow syscall offset to be symbolic
x86, syscall: Re-fix typo in comment
x86: Simplify syscallhdr.sh
x86: Generate system call tables and unistd_*.h from tables
checksyscalls: Use arch/x86/syscalls/syscall_32.tbl as source
x86: Machine-readable syscall tables and scripts to process them
trace: Include <asm/asm-offsets.h> in trace_syscalls.c
x86-64, ia32: Move compat_ni_syscall into C and its own file
x86-64, syscall: Adjust comment spacing and remove typo
kbuild: Add support for an "archheaders" target
kbuild: Add support for installing generated asm headers
Linus Torvalds [Tue, 17 Jan 2012 01:53:27 +0000 (17:53 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-ktest:
ktest: Add INGORE_ERRORS to ignore warnings in boot up
ktest: Still do reboot even for REBOOT_TYPE = script
ktest: Fix compare script to test if options are not documented
ktest: Detect typos in option names
ktest: Have all values be set by defaults
ktest: Change initialization of defaults hash to perl format
ktest: Add options SWITCH_TO_GOOD and SWITCH_TO_TEST
ktest: Allow overriding bisect test results
ktest: Evaluate options before processing them
ktest: Evaluate $KERNEL_VERSION in both install and post install
ktest: Only ask options needed for install
ktest: When creating a new config, ask for BUILD_OPTIONS
ktest: Do not ask for some options if the only test is build
ktest: Ask for type of test when creating a new config
ktest: Allow bisect test to restart where it left off
ktest: When creating new config, allow the use of ${THIS_DIR}
ktest: Add default for ssh-user, build-target and target-image
ktest: Allow success logs to be stored
ktest: Save test output
mce: fix warning messages about static struct mce_device
When suspending, there was a large list of warnings going something like:
Device 'machinecheck1' does not have a release() function, it is broken and must be fixed
This patch turns the static mce_devices into dynamically allocated, and
properly frees them when they are removed from the system. It solves
the warning messages on my laptop here.
Linus Torvalds [Mon, 16 Jan 2012 23:34:44 +0000 (15:34 -0800)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-arm
* 'fixes' of git://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-arm:
ARM: sa11x0: assabet: fix build warning
ARM: Add arm_memblock_steal() to allocate memory away from the kernel
ARM: 7275/1: LPAE: Check the CPU support for the long descriptor format
ARM: 7274/1: NUC900: Rename nuc900-audio platform device to nuc900-ac97
ARM: 7272/1: S3C24XX: Fix build error for missing <mach/system-reset.h>
ARM: 7271/1: Fix typo in conversion of ARCH_NR_GPIOS to Kconfig
Linus Torvalds [Mon, 16 Jan 2012 23:08:13 +0000 (15:08 -0800)]
Merge tag 'nfs-for-3.3-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
NFS client bugfixes and cleanups for Linux 3.3 (pull 2)
* tag 'nfs-for-3.3-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
pnfsblock: alloc short extent before submit bio
pnfsblock: remove rpc_call_ops from struct parallel_io
pnfsblock: move find lock page logic out of bl_write_pagelist
pnfsblock: cleanup bl_mark_sectors_init
pnfsblock: limit bio page count
pnfsblock: don't spinlock when freeing block_dev
pnfsblock: clean up _add_entry
pnfsblock: set read/write tk_status to pnfs_error
pnfsblock: acquire im_lock in _preload_range
NFS4: fix compile warnings in nfs4proc.c
nfs: check for integer overflow in decode_devicenotify_args()
NFS: cleanup endian type in decode_ds_addr()
NFS: add an endian notation
Linus Torvalds [Mon, 16 Jan 2012 23:07:46 +0000 (15:07 -0800)]
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
hwmon: (sysfs-interface) Update tempX_type attribute to be more generic
hwmon: (adm1031) Fix coding style issues
hwmon: (it87) Add IT8728F support
hwmon: (coretemp) Add missing section annotations
hwmon: (lm90) Add range check to set_update_interval
hwmon: (lm63) Support extended lookup table of LM96163
hwmon: (lm63) Expose automatic fan speed control lookup table
hwmon: (lm63) Fix incorrect comment about I2C address
hwmon: (lm63) LM64 has a dedicated pin for tachometer
hwmon: (lm63) Add sensor type attribute for external sensor on LM96163
hwmon: (lm63) Add support for update_interval sysfs attribute
hwmon: (lm63) Add support for writing the external critical temperature
hwmon: (lm63) Add support for unsigned upper temperature limits
hwmon: (lm63) Add support for LM96163
hwmon: (lm63) Add support for external temperature offset register
hwmon: (lm63) Fix checkpatch errors
hwmon: (max1111) Change sysfs interface to in[0-3]_input in millivolts
Linus Torvalds [Mon, 16 Jan 2012 23:02:30 +0000 (15:02 -0800)]
Merge branch 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
* 'pm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / Hibernate: Drop the check of swap space size for compressed image
PM / shmobile: fix A3SP suspend method
PM / Domains: Skip governor functions for CONFIG_PM_RUNTIME unset
PM / Domains: Fix build for CONFIG_PM_SLEEP unset
PM: Make sysrq-o be available for CONFIG_PM unset
Linus Torvalds [Mon, 16 Jan 2012 22:36:07 +0000 (14:36 -0800)]
Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
scripts/coccinelle: improve the coverage of some semantic patches
coccinelle: semantic patches related to devm_ functions (part 2)
coccinelle: semantic patches related to devm_ functions (part 1)
coccinelle.txt: update documentation to include M= option
coccicheck: add M= option to control which dir is processed
ctags: remove struct forward declarations
scripts/tags.sh: Add Page flag function magic
Linus Torvalds [Mon, 16 Jan 2012 22:35:34 +0000 (14:35 -0800)]
Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
menuconfig: fix a regression when canceling the prompt dialog at exit
kbuild: Fix compiler warning with assertion when calling 'fwrite'
Improve update-po-config output
menuconfig: let make not report error when not save configuration
merge_config.sh: fix bug in final check
merge_config.sh: whitespace cleanup
merge_config.sh: use signal names compatible with dash and bash
kconfig: add merge_config.sh script
kconfig: use xfwrite wrapper function to silence warnings
kconfig: fix set but not used warnings
kconfig: fix warnings by specifing format arguments
Linus Torvalds [Mon, 16 Jan 2012 22:34:54 +0000 (14:34 -0800)]
Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
Kbuild: Use dtc's -d (dependency) option
dtc: Implement -d option to write out a dependency file
kbuild: Fix comment in Makefile.lib
scripts/genksyms: clean lex/yacc generated files
kbuild: Correctly deal with make options which contain an "s"
Russell King [Sat, 14 Jan 2012 16:10:53 +0000 (16:10 +0000)]
ARM: sa11x0: assabet: fix build warning
Since a32618d2 (ARM: pgtable: switch to use pgtable-nopud.h), assabet
warns as follows:
arch/arm/mach-sa1100/assabet.c: In function 'map_sa1100_gpio_regs':
arch/arm/mach-sa1100/assabet.c:264: warning: passing argument 1 of 'pmd_offset' from incompatible pointer type
Fix this by adding the necessary pud_offset() macro.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Guenter Roeck [Mon, 16 Jan 2012 21:51:48 +0000 (22:51 +0100)]
hwmon: (sysfs-interface) Update tempX_type attribute to be more generic
The temp[1-*]_type attribute reports the temperature sensor type. Sensor type 1
is described as "PII/Celeron Diode", which is quite restrictive; other CPUs
may also have an embedded temperature sensor diode with similar characteristics.
Change description to "CPU embedded diode" to be more generic.
Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Mon, 16 Jan 2012 21:51:48 +0000 (22:51 +0100)]
hwmon: (adm1031) Fix coding style issues
Fix almost all coding style issues except for the multi-line macro errors,
which do not really apply since the macros are not multi-line statements
but declarations.
Based on merged patch series from Zac Storer; fixed remaining checkpatch
errors and warnings.
Guenter Roeck [Mon, 16 Jan 2012 21:51:47 +0000 (22:51 +0100)]
hwmon: (lm90) Add range check to set_update_interval
When writing the update_interval attribute, the parameter value was
not range checked, which could cause an integer overflow and result
in an arbitrary update interval. Fix by limiting the value range to
<0, 100000>.
Reported-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Mon, 16 Jan 2012 21:51:47 +0000 (22:51 +0100)]
hwmon: (lm63) Expose automatic fan speed control lookup table
The LM63 and compatible devices have a lookup table to control the fan
speed automatically. Expose it in sysfs. Values are cached for 5
seconds, independently of the other register values to avoid slowing
down "sensors". We might make the table values writable in the future.
Guenter Roeck [Mon, 16 Jan 2012 21:51:46 +0000 (22:51 +0100)]
hwmon: (lm63) Add sensor type attribute for external sensor on LM96163
On LM96163, the external temperature sensor type is configurable to
either a thermal diode or a 3904 transistor. The chip reports a wrong
temperature if misconfigured. Add writable attribute to support it.
Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Mon, 16 Jan 2012 21:51:46 +0000 (22:51 +0100)]
hwmon: (lm63) Add support for writing the external critical temperature
On LM64, the external critical temperature limit is always writable. On LM96163,
it is writable if the chip is configured for it. Add conditional support for
writing the register dependent on chip type and configuration.
Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Mon, 16 Jan 2012 21:51:45 +0000 (22:51 +0100)]
hwmon: (lm63) Add support for LM96163
LM96163 is an enhanced version of LM63 with improved PWM resolution. Add chip
detection code as well as support for improved PWM resolution if the chip is
configured to use it.
Eric Miao [Mon, 16 Jan 2012 21:51:45 +0000 (22:51 +0100)]
hwmon: (max1111) Change sysfs interface to in[0-3]_input in millivolts
This patch fixed the inconsistent max1111 sysfs interface as pointed
out by Jean Delvare:
It was pointed to me that the max1111 driver doesn't implement the
standard sysfs interface for hwmon drivers (as described in
Documentation/hwmon/sysfs-interface). It exports files adc[0-3]_in,
which
aren't part of the standard interface. Presumably these should be
renamed to in[0-3]_input. Renaming them is probably not sufficient
though, as I see no scaling done in the driver. As the MAX1111 chip has
a documented full scale of 2.048V, I take it that the LSB of the ADC
has a weight of 8 mV. Exporting raw register values to user-space is
not OK.
Reported-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Chris Mason [Mon, 16 Jan 2012 13:13:11 +0000 (08:13 -0500)]
Btrfs: use larger system chunks
system chunks by default are very small. This makes them slightly
larger and also fixes the conditional checks to make sure we don't
allocate a billion of them at once.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Fri, 13 Jan 2012 17:09:22 +0000 (12:09 -0500)]
Btrfs: add a delalloc mutex to inodes for delalloc reservations
I was using i_mutex for this, but we're getting bogus lockdep warnings by doing
that and theres no real way to get rid of those, so just stop using i_mutex to
protect delalloc metadata reservations and use a delalloc mutex instead. This
shouldn't be contended often at all, only if you are writing and mmap writing to
the file at the same time. Thanks,
Josef Bacik [Tue, 10 Jan 2012 15:31:31 +0000 (10:31 -0500)]
Btrfs: space leak tracepoints
This in addition to a script in my btrfs-tracing tree will help track down space
leaks when we're getting space left over in block groups on umount. Thanks,
Josef Bacik [Fri, 2 Dec 2011 20:44:12 +0000 (15:44 -0500)]
Btrfs: protect orphan block rsv with spin_lock
We've been seeing warnings coming out of the orphan commit stuff forever from
ceph. Turns out it's because we're racing with checking if the orphan block
reserve is set, because we clear it outside of the spin_lock. So leave the
normal fastpath checks where they are, but take the spin_lock and _recheck_ to
make sure we haven't had an orphan block rsv added in the meantime. Then clear
the root's orphan block rsv and release the lock. With this patch a user said
the warnings went away and they usually showed up pretty soon after he started
ceph. Thanks,
Josef Bacik [Thu, 10 Nov 2011 13:29:20 +0000 (08:29 -0500)]
Btrfs: add allocator tracepoints
I used these tracepoints when figuring out what the cluster stuff was doing, so
add them to mainline in case we need to profile this stuff again. Thanks,
Josef Bacik [Fri, 13 Jan 2012 00:10:12 +0000 (19:10 -0500)]
Btrfs: don't call btrfs_throttle in file write
Btrfs_throttle will make us wait if there is a currently committing transaction
until we can open new transactions, which is ridiculous since we don't actually
start any transactions within the file write path anyway, so all this does is
introduce big latencies if we have a sync/fsync heavy workload going on while
somebody else is trying to do work. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Fri, 13 Jan 2012 00:10:12 +0000 (19:10 -0500)]
Btrfs: release space on error in page_mkwrite
If updating the inode gave us an ENOSPC we were just returning in page_mkwrite,
which is a problem since we make our reservation right before trying to update
the inode, so fix the out label so that we actually free our reservation.
Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
This is because of the wrong if condition, which is used to check if we should
subtract the bytes of the dropped range from i_blocks/i_bytes of i-node or not.
When we truncate a compressed extent, btrfs substracts the bytes of the whole
extent, it's wrong. We should substract the real size that we truncate, no
matter it is a compressed extent or not. Fix it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Josef Bacik [Fri, 13 Jan 2012 00:10:12 +0000 (19:10 -0500)]
Btrfs: do not use btrfs_end_transaction_throttle everywhere
A user reported a problem where things like open with O_CREAT would take up to
30 seconds when he had nfs activity on the same mount. This is because all of
our quick metadata operations, like create, symlink etc all do
btrfs_end_transaction_throttle, which if the transaction is blocked will wait
for the commit to complete before it returns. This adds a ridiculous amount of
latency and isn't really needed. The normal btrfs_end_transaction will mark the
transaction as blocked and wake the transaction kthread up if it thinks the
transaction needs to end (this being in the running out of global reserve space
scenario), and this is all that is really needed since we've already done
everything we're going to do, we just need to return. This should help people
with the latency they were seeing when using synchronous heavy workloads.
Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Ilya Dryomov [Mon, 16 Jan 2012 20:04:49 +0000 (22:04 +0200)]
Btrfs: allow for resuming restriper after it was paused
Recognize BTRFS_BALANCE_RESUME flag passed from userspace. We use the
same heuristics used when recovering balance after a crash to try to
start where we left off last time.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:49 +0000 (22:04 +0200)]
Btrfs: allow for canceling restriper
Implement an ioctl for canceling restriper. Currently we wait until
relocation of the current block group is finished, in future this can be
done by triggering a commit. Balance item is deleted and no memory
about the interrupted balance is kept.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:49 +0000 (22:04 +0200)]
Btrfs: allow for pausing restriper
Implement an ioctl for pausing restriper. This pauses the relocation,
but balance is still considered to be "in progress": balance item is
not deleted, other volume operations cannot be started, etc. If paused
in the middle of profile changing operation we will continue making
allocations with the target profile.
Add a hook to close_ctree() to pause restriper and free its data
structures on unmount. (It's safe to unmount when restriper is in
"paused" state, we will resume with the same parameters on the next
mount)
Ilya Dryomov [Mon, 16 Jan 2012 20:04:48 +0000 (22:04 +0200)]
Btrfs: add skip_balance mount option
Since restriper kthread starts involuntarily on mount and can suck cpu
and memory bandwidth add a mount option to forcefully skip it. The
restriper in that case hangs around in paused state and can be resumed
from userspace when it's convenient.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:48 +0000 (22:04 +0200)]
Btrfs: recover balance on mount
On mount, if balance item is found, resume balance in a separate
kernel thread.
Try to be smart to continue roughly where previous balance (or convert)
was interrupted. For chunk types that were being converted to some
profile we turn on soft convert, in case of a simple balance we turn on
usage filter and relocate only less-than-90%-full chunks of that type.
These are just heuristics but they help quite a bit, and can be improved
in future.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:48 +0000 (22:04 +0200)]
Btrfs: save balance parameters to disk
Introduce a new btree objectid for storing balance item. The reason is
to be able to resume restriper after a crash with the same parameters.
Balance item has a very high objectid and goes into tree of tree roots.
When doing convert from one profile to another if soft mode is on
restriper won't touch chunks that already have the profile we are
converting to. This is useful if e.g. half of the FS was converted
earlier.
The soft mode switch is (like every other filter) per-type. This means
that we can convert for example meta chunks the "hard" way while
converting data chunks selectively with soft switch.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:48 +0000 (22:04 +0200)]
Btrfs: implement online profile changing
Profile changing is done by launching a balance with
BTRFS_BALANCE_CONVERT bits set and target fields of respective
btrfs_balance_args structs initialized. Profile reducing code in this
case will pick restriper's target profile if it's available instead of
doing a blind reduce. If target profile is not yet available it goes
back to a plain reduce.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:48 +0000 (22:04 +0200)]
Btrfs: do not reduce profile in do_chunk_alloc()
Every caller of do_chunk_alloc() feeds it the reduced allocation
profile, so stop trying to reduce it one more time. Instead check the
validity of the passed profile.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:47 +0000 (22:04 +0200)]
Btrfs: add basic infrastructure for selective balancing
This allows to have a separate set of filters for each chunk type
(data,meta,sys). The code however is generic and switch on chunk type
is only done once.
This commit also adds a type filter: it allows to balance for example
meta and system chunks w/o touching data ones.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:47 +0000 (22:04 +0200)]
Btrfs: add basic restriper infrastructure
Add basic restriper infrastructure: extended balancing ioctl and all
related ioctl data structures, add data structure for tracking
restriper's state to fs_info, etc. The semantics of the old balancing
ioctl are fully preserved.
Explicitly disallow any volume operations when balance is in progress.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:47 +0000 (22:04 +0200)]
Btrfs: make avail_*_alloc_bits fields dynamic
Currently when new chunks are created respective avail_alloc_bits field
is updated to reflect profiles of all chunks present in the system.
However when chunks are removed profile bits are never cleared.
This patch clears profile bit of respective avail_alloc_bits field when
the last chunk with that profile is removed. Restriper needs this to
properly operate when "downgrading".
Ilya Dryomov [Mon, 16 Jan 2012 20:04:47 +0000 (22:04 +0200)]
Btrfs: add BTRFS_AVAIL_ALLOC_BIT_SINGLE bit
Right now on-disk BTRFS_BLOCK_GROUP_* profile bits are used for
avail_{data,metadata,system}_alloc_bits fields, which gather info about
available allocation profiles in the FS. When chunk is created or read
from disk, its profile is OR'ed with the corresponding avail_alloc_bits
field. Since SINGLE is denoted by 0 in the on-disk format, currently
there is no way to tell when such chunks become avaialble. Restriper
needs that information, so add a separate bit for SINGLE profile.
This bit is going to be in-memory only, it should never be written out
to disk, so it's not a disk format change. However to avoid remappings
in future, reserve corresponding on-disk bit.
Ilya Dryomov [Mon, 16 Jan 2012 20:04:47 +0000 (22:04 +0200)]
Btrfs: introduce masks for chunk type and profile
Chunk's type and profile are encoded in u64 flags field. Introduce
masks to easily access them. Also fix the type of BTRFS_BLOCK_GROUP_*
constants, it should be ULL.
Yoni Divinsky [Mon, 16 Jan 2012 13:18:59 +0000 (15:18 +0200)]
mac80211: fix tx->skb NULL pointer dereference
In function ieee80211_tx_h_encrypt the var info was
initialized from tx->skb, since the fucntion
is called after the function ieee80211_tx_h_fragment
tx->skb is not valid anymore.
Signed-off-by: Yoni Divinsky <yoni.divinsky@ti.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Fabio Estevam [Mon, 16 Jan 2012 02:47:12 +0000 (00:47 -0200)]
wireless: iwlwifi: iwl-scan.c: Fix build warning
Fix the following build warning:
drivers/net/wireless/iwlwifi/iwl-scan.c: In function ‘iwlagn_request_scan’:
drivers/net/wireless/iwlwifi/iwl-scan.c:572: warning: ‘cmd_len’ may be used uninitialized in this function
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Acked-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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