Rik van Riel [Sat, 3 Nov 2012 00:42:20 +0000 (11:42 +1100)]
mm,vmscan: only evict file pages when we have plenty
If we have more inactive file pages than active file pages, we skip
scanning the active file pages altogether, with the idea that we do not
want to evict the working set when there is plenty of streaming IO in the
cache.
However, the code forgot to also skip scanning anonymous pages in that
situation. That leads to the curious situation of keeping the active file
pages protected from being paged out when there are lots of inactive file
pages, while still scanning and evicting anonymous pages.
This patch fixes that situation, by only evicting file pages when we have
plenty of them and most are inactive.
Signed-off-by: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Jan Kara [Sat, 3 Nov 2012 00:42:19 +0000 (11:42 +1100)]
mm: add comment on storage key dirty bit semantics
Add comments that dirty bit in storage key gets set whenever page content
is changed. Hopefully if someone will use this function, he'll have a
look at one of the two places where we comment on this.
Signed-off-by: Jan Kara <jack@suse.cz> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Lai Jiangshan [Sat, 3 Nov 2012 00:42:19 +0000 (11:42 +1100)]
slub, hotplug: ignore unrelated node's hot-adding and hot-removing
SLUB only focuses on the nodes which have normal memory and it ignores the
other node's hot-adding and hot-removing.
Aka: if some memory of a node which has no onlined memory is online, but
this new memory onlined is not normal memory (for example, highmem), we
should not allocate kmem_cache_node for SLUB.
And if the last normal memory is offlined, but the node still has memory,
we should remove kmem_cache_node for that node. (The current code delays
it when all of the memory is offlined)
So we only do something when marg->status_change_nid_normal > 0.
marg->status_change_nid is not suitable here.
The same problem doesn't exist in SLAB, because SLAB allocates kmem_list3
for every node even the node don't have normal memory, SLAB tolerates
kmem_list3 on alien nodes. SLUB only focuses on the nodes which have
normal memory, it don't tolerate alien kmem_cache_node. The patch makes
SLUB become self-compatible and avoids WARNs and BUGs in rare conditions.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Rob Landley <rob@landley.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Mel Gorman <mgorman@suse.de> Cc: Wen Congyang <wency@cn.fujitsu.com> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Lai Jiangshan [Sat, 3 Nov 2012 00:42:19 +0000 (11:42 +1100)]
memory_hotplug: fix possible incorrect node_states[N_NORMAL_MEMORY]
Currently memory_hotplug only manages the node_states[N_HIGH_MEMORY], it
forgets to manage node_states[N_NORMAL_MEMORY]. This may cause
node_states[N_NORMAL_MEMORY] to become incorrect.
Example, if a node is empty before online, and we online a memory which is
in ZONE_NORMAL. And after online, node_states[N_HIGH_MEMORY] is correct,
but node_states[N_NORMAL_MEMORY] is incorrect, the online code doesn't set
the new online node to node_states[N_NORMAL_MEMORY].
The same thing will happen when offlining (the offline code doesn't clear
the node from node_states[N_NORMAL_MEMORY] when needed). Some memory
managment code depends node_states[N_NORMAL_MEMORY], so we have to fix up
the node_states[N_NORMAL_MEMORY].
We add node_states_check_changes_online() and
node_states_check_changes_offline() to detect whether
node_states[N_HIGH_MEMORY] and node_states[N_NORMAL_MEMORY] are changed
while hotpluging.
Also add @status_change_nid_normal to struct memory_notify, thus the
memory hotplug callbacks know whether the node_states[N_NORMAL_MEMORY] are
changed. (We can add a @flags and reuse @status_change_nid instead of
introducing @status_change_nid_normal, but it will add much more
complexity in memory hotplug callback in every subsystem. So introducing
@status_change_nid_normal is better and it doesn't change the sematics of
@status_change_nid)
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Rob Landley <rob@landley.net> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Mel Gorman <mgorman@suse.de> Cc: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:18 +0000 (11:42 +1100)]
memory-hotplug: build zonelist if a zone is populated after onlining pages
After "memory-hotplug: allocate zone's pcp before onlining pages", we
build zone list before onlining pages to allocate zone's pcp. But the
zone doesn't have pages before onlining pages, and the zone is not in
zonelist, so we still need to build zonelist after onlining pages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Michal Hocko [Sat, 3 Nov 2012 00:42:18 +0000 (11:42 +1100)]
mm: make zone_pcp_reset independent of MEMORY_HOTREMOVE
340175b7 (mm/hotplug: free zone->pageset when a zone becomes empty)
introduced zone_pcp_reset and hided it inside CONFIG_MEMORY_HOTREMOVE.
Since "memory-hotplug: allocate zone's pcp before onlining pages" the
function is also called from online_pages which is defined outside
CONFIG_MEMORY_HOTREMOVE which causes a linkage error.
The function, although not used outside of MEMORY_{HOTPLUT,HOTREMOVE},
seems like universal enough so let's keep it at its current location
and only remove the HOTREMOVE guard.
Signed-off-by: Michal Hocko <mhocko@suse.cz> Reviewed-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:18 +0000 (11:42 +1100)]
memory-hotplug: allocate zone's pcp before onlining pages
We use __free_page() to put a page to buddy system when onlining pages.
__free_page() will store NR_FREE_PAGES in zone's pcp.vm_stat_diff, so we
should allocate zone's pcp before onlining pages, otherwise we will lose
some free pages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:17 +0000 (11:42 +1100)]
memory-hotplug, mm/sparse.c: clear the memory to store struct page
If sparse memory vmemmap is enabled, we can't free the memory to store
struct page when a memory device is hotremoved, because we may store
struct page in the memory to manage the memory which doesn't belong to
this memory device. When we hotadded this memory device again, we will
reuse this memory to store struct page, and struct page may contain some
obsolete information, and we will get bad-page state:
memory-hotplug: suppress "Device nodeX does not have a release() function" warning
When calling unregister_node(), the function shows following message at
device_release().
"Device 'node2' does not have a release() function, it is broken and must
be fixed."
The reason is node's device struct does not have a release() function.
So the patch registers node_device_release() to the device's release()
function for suppressing the warning message. Additionally, the patch
adds memset() to initialize a node struct into register_node(). Because
the node struct is part of node_devices[] array and it cannot be freed by
node_device_release(). So if system reuses the node struct, it has a
garbage.
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:17 +0000 (11:42 +1100)]
numa: convert static memory to dynamically allocated memory for per node device
We use a static array to store struct node. In many cases, we don't have
too many nodes, and some memory will be unused. Convert it to per-device
dynamically allocated memory.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:16 +0000 (11:42 +1100)]
memory-hotplug: fix NR_FREE_PAGES mismatch
NR_FREE_PAGES will be wrong after offlining pages. We add/dec
NR_FREE_PAGES like this now:
1. move all pages in buddy system to MIGRATE_ISOLATE, and dec NR_FREE_PAGES
2. don't add NR_FREE_PAGES when it is freed and the migratetype is
MIGRATE_ISOLATE
3. dec NR_FREE_PAGES when offlining isolated pages.
4. add NR_FREE_PAGES when undoing isolate pages.
When we come to step 3, all pages are in MIGRATE_ISOLATE list, and
NR_FREE_PAGES are right. When we come to step4, all pages are not in
buddy system, so we don't change NR_FREE_PAGES in this step, but we change
NR_FREE_PAGES in step3. So NR_FREE_PAGES is wrong after offlining pages.
So there is no need to change NR_FREE_PAGES in step3.
This patch also fixs a problem in step2: if the migratetype is
MIGRATE_ISOLATE, we should not add NR_FRR_PAGES when we remove pages from
pcppages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:16 +0000 (11:42 +1100)]
memory-hotplug: auto offline page_cgroup when onlining memory block failed
When a memory block is onlined, we will try allocate memory on that node
to store page_cgroup. If onlining the memory block failed, we don't
offline the page cgroup, and we have no chance to offline this page cgroup
unless the memory block is onlined successfully again. It will cause that
we can't hot-remove the memory device on that node, because some memory is
used to store page cgroup. If onlining the memory block is failed, there
is no need to stort page cgroup for this memory. So auto offline
page_cgroup when onlining memory block failed.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:15 +0000 (11:42 +1100)]
memory-hotplug: skip HWPoisoned page when offlining pages
hwpoisoned may be set when we offline a page by the sysfs interface
/sys/devices/system/memory/soft_offline_page or
/sys/devices/system/memory/hard_offline_page. If we don't clear
this flag when onlining pages, this page can't be freed, and will
not in free list. So we can't offline these pages again. So we
should skip such page when offlining pages.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Len Brown <len.brown@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Lameter <cl@linux.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
memory hotplug: suppress "Device memoryX does not have a release() function" warning
When calling remove_memory_block(), the function shows following message
at device_release().
"Device 'memory528' does not have a release() function, it is broken and
must be fixed."
The reason is memory_block's device struct does not have a release()
function.
So the patch registers memory_block_release() to the device's release()
function for suppressing the warning message. Additionally, the patch
moves kfree(mem) into the release function since the release function is
prepared as a means to free a memory_block struct.
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Jiang Liu <liuj97@gmail.com> Cc: Minchan Kim <minchan.kim@gmail.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Bob Liu [Sat, 3 Nov 2012 00:42:14 +0000 (11:42 +1100)]
thp: cleanup: introduce mk_huge_pmd()
Introduce mk_huge_pmd() to simplify the code
Signed-off-by: Bob Liu <lliubbo@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Ni zhan Chen <nizhan.chen@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Bob Liu [Sat, 3 Nov 2012 00:42:14 +0000 (11:42 +1100)]
thp: introduce hugepage_vma_check()
Multiple places do the same check.
Signed-off-by: Bob Liu <lliubbo@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Ni zhan Chen <nizhan.chen@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Andrew Morton [Sat, 3 Nov 2012 00:42:14 +0000 (11:42 +1100)]
mm-introduce-mm_find_pmd-fix
mm/rmap.c: In function 'try_to_unmap_cluster':
mm/rmap.c:1364:9: warning: unused variable 'pud' [-Wunused-variable]
mm/rmap.c:1363:9: warning: unused variable 'pgd' [-Wunused-variable]
Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Bob Liu <lliubbo@gmail.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Ni zhan Chen <nizhan.chen@gmail.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Bob Liu [Sat, 3 Nov 2012 00:42:13 +0000 (11:42 +1100)]
mm: introduce mm_find_pmd()
Several place need to find the pmd by(mm_struct, address), so introduce a
function to simplify it.
Signed-off-by: Bob Liu <lliubbo@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Ni zhan Chen <nizhan.chen@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Bob Liu [Sat, 3 Nov 2012 00:42:13 +0000 (11:42 +1100)]
thp-clean-up-__collapse_huge_page_isolate v2
mv label out of condition.
Signed-off-by: Bob Liu <lliubbo@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Ni zhan Chen <nizhan.chen@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Bob Liu [Sat, 3 Nov 2012 00:42:13 +0000 (11:42 +1100)]
thp: clean up __collapse_huge_page_isolate
There are duplicated places using release_pte_pages().
And release_all_pte_pages() can be removed.
Signed-off-by: Bob Liu <lliubbo@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Ni zhan Chen <nizhan.chen@gmail.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm: use IS_ENABLED(CONFIG_COMPACTION) instead of COMPACTION_BUILD
We don't need custom COMPACTION_BUILD anymore, since we have handy
IS_ENABLED().
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Namjae Jeon [Sat, 3 Nov 2012 00:42:11 +0000 (11:42 +1100)]
writeback: remove nr_pages_dirtied arg from balance_dirty_pages_ratelimited_nr()
There is no reason to pass the nr_pages_dirtied argument, because
nr_pages_dirtied value from the caller is unused in
balance_dirty_pages_ratelimited_nr().
Gavin Shan [Sat, 3 Nov 2012 00:42:11 +0000 (11:42 +1100)]
mm/page_alloc.c: remove duplicate check
While allocating pages using buddy allocator, the compound page is
probably split up to free pages. Under these circumstances, the compound
page should be destroyed by destroy_compound_page(). However, there is a
duplicate check to judge if the page is compound.
Remove the duplicate check since the compound_order() returns 0 when the
page doesn't have PG_head set in destroy_compound_page(). That is to say,
destroy_compound_page() needn't check PageHead().
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Zhao Hongjiang [Sat, 3 Nov 2012 00:42:10 +0000 (11:42 +1100)]
fs: change return values from -EACCES to -EPERM
According to SUSv3:
[EACCES] Permission denied. An attempt was made to access a file in a way
forbidden by its file access permissions.
[EPERM] Operation not permitted. An attempt was made to perform an operation
limited to processes with appropriate privileges or to the owner of a file
or other resource.
So -EPERM should be returned if capability checks fails.
Strictly speaking this is an API change since the error code user sees is
Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com> Acked-by: Jan Kara <jack@suse.cz> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Ian Kent <raven@themaw.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Dmitry Kasatkin [Sat, 3 Nov 2012 00:42:10 +0000 (11:42 +1100)]
vfs: increment iversion when a file is truncated
When a file is truncated with truncate()/ftruncate() and then closed,
iversion is not updated. This patch uses ATTR_SIZE flag as an indication
to increment iversion.
Mimi said:
On fput(), i_version is used to detect and flag files that have changed
and need to be re-measured in the IMA measurement policy. When a file
is truncated with truncate()/ftruncate() and then closed, i_version is
not updated. As a result, although the file has changed, it will not be
re-measured and added to the IMA measurement list on subsequent access.
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com> Acked-by: Mimi Zohar <zohar@us.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Akinobu Mita [Sat, 3 Nov 2012 00:42:09 +0000 (11:42 +1100)]
drbd: use copy_highpage
Use copy_highpage() to copy from one page to another.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stephen Warren [Sat, 3 Nov 2012 00:42:09 +0000 (11:42 +1100)]
block: partition: msdos: provide UUIDs for partitions
The MSDOS/MBR partition table includes a 32-bit unique ID, often referred
to as the NT disk signature. When combined with a partition number within
the table, this can form a unique ID similar in concept to EFI/GPT's
partition UUID. Constructing and recording this value in struct
partition_meta_info allows MSDOS partitions to be referred to on the
kernel command-line using the following syntax:
Stephen Warren [Sat, 3 Nov 2012 00:42:09 +0000 (11:42 +1100)]
init: reduce PARTUUID min length to 1 from 36
Reduce the minimum length for a root=PARTUUID= parameter to be considered
valid from 36 to 1. EFI/GPT partition UUIDs are always exactly 36
characters long, hence the previous limit. However, the next patch will
support DOS/MBR UUIDs too, which have a different, shorter, format.
Instead of validating any particular length, just ensure that at least
some non-empty value was given by the user.
Also, consider a missing UUID value to be a parsing error, in the same
vein as if /PARTNROFF exists and can't be parsed. As such, make both
error cases print a message and disable rootwait. Convert to pr_err while
we're at it.
Signed-off-by: Stephen Warren <swarren@nvidia.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Tejun Heo <tj@kernel.org> Cc: Will Drewry <wad@chromium.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stephen Warren [Sat, 3 Nov 2012 00:42:09 +0000 (11:42 +1100)]
block: store partition_meta_info.uuid as a string
This will allow other types of UUID to be stored here, aside from true
UUIDs. This also simplifies code that uses this field, since it's usually
constructed from a, used as a, or compared to other, strings.
Note: A simplistic approach here would be to set uuid_str[36]=0 whenever a
/PARTNROFF option was found to be present. However, this modifies the
input string, and causes subsequent calls to devt_from_partuuid() not to
see the /PARTNROFF option, which causes different results. In order to
avoid misleading future maintainers, this parameter is marked const.
Signed-off-by: Stephen Warren <swarren@nvidia.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Tejun Heo <tj@kernel.org> Cc: Will Drewry <wad@chromium.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Akinobu Mita [Sat, 3 Nov 2012 00:42:08 +0000 (11:42 +1100)]
cciss: use check_signature()
Use check_signature() to find a signature in the mmio address.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Akinobu Mita [Sat, 3 Nov 2012 00:42:08 +0000 (11:42 +1100)]
cciss: cleanup bitops usage
- Remove unnecessary correction of bit and address
- Use BITS_TO_LONGS macro to calculate bitmap size
- Use bitmap_zero()
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Mike Miller <mike.miller@hp.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The block control group, infiniband, xfs, crypto, 802.11, netfilter.
Nothing quite so fundamental as fs/namespace.c but definitely in
multiplatform-code that should work, and is already broken on those
architecutres.
Looking at the implementation of atomic64_add_return in lib/atomic64.c the
code looks as efficient as these kinds of things get.
Which leads me to the conclusion that we need atomic64 support on all
architectures.
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Hannes Reinecke [Sat, 3 Nov 2012 00:42:07 +0000 (11:42 +1100)]
fs/pstore/ram.c: fix up section annotations
The compiler complained about missing section annotations. Fix it.
Signed-off-by: Hannes Reinecke <hare@suse.de> Cc: Anton Vorontsov <cbouatmailru@gmail.com> Cc: Colin Cross <ccross@android.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
How is the compiler even handling exported functions that are marked
inline? Anyway, these shouldn't be inline because of that, so remove that
marking.
Based on a larger patch by Mark Charlebois to get LLVM to build the
kernel.
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Mark Charlebois <mcharleb@qualcomm.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: hank <pyu@redhat.com> Cc: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The use of defined() on arrays and hashes has been deprecated since perl
5.6, but until 5.17.6 it only warned on lexicals, not package globals.
Signed-off-by: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Jean Delvare [Sat, 3 Nov 2012 00:42:06 +0000 (11:42 +1100)]
drm/i915: optimize DIV_ROUND_CLOSEST() call
DIV_ROUND_CLOSEST is faster if the compiler knows it will only be dealing
with unsigned dividends.
Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
pcmcia: move unbind/rebind into dev_pm_ops.complete
Move the device rebind procedures for cardbus devices from the pm.resume
into the pm.complete callback.
The reason for moving the code is: "[...] The PM code needs to send
suspend and resume messages to every device in the right order, and it
can't do that if new devices are being added at the same time. [...]"
However the situation really isn't quite that rigid. In particular,
adding new children during a resume callback shouldn't cause much of
problem because the children don't need to be resumed anyway (since they
were never suspended). On the other hand, if you do it you will get a
dev_warn() from the PM core, something like 'parent should not be
sleeping'.
Still, it is considered bad form and should be avoided if possible."
(Alan Stern's full comment about the topic can
be found here: <https://lkml.org/lkml/2012/7/10/254>)
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Greg KH <greg@kroah.com> Acked-by: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:05 +0000 (11:42 +1100)]
x86: make 'mem=' option work for efi platform
Current mem boot option only can work for non efi environments. If the
user specifies add_efi_memmap, it cannot work for efi environment.
In the efi environment, we call e820_add_region() to add the memory map.
So we can modify __e820_add_region() and the mem boot option can work for
an efi environment.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Randy Dunlap [Sat, 3 Nov 2012 00:42:04 +0000 (11:42 +1100)]
olpc: fix olpc-xo1-sci.c build errors
Fix build errors when CONFIG_INPUT=m. This is not pretty, but all of the
OLPC kconfig options are bool instead of tristate.
arch/x86/built-in.o: In function `send_lid_state':
olpc-xo1-sci.c:(.text+0x1d323): undefined reference to `input_event'
olpc-xo1-sci.c:(.text+0x1d338): undefined reference to `input_event'
arch/x86/built-in.o: In function `free_ebook_switch':
olpc-xo1-sci.c:(.text+0x1d529): undefined reference to `input_unregister_device'
olpc-xo1-sci.c:(.text+0x1d533): undefined reference to `input_free_device'
arch/x86/built-in.o: In function `free_power_button':
olpc-xo1-sci.c:(.text+0x1d549): undefined reference to `input_unregister_device'
olpc-xo1-sci.c:(.text+0x1d553): undefined reference to `input_free_device'
arch/x86/built-in.o: In function `send_ebook_state':
olpc-xo1-sci.c:(.text+0x1d632): undefined reference to `input_event'
olpc-xo1-sci.c:(.text+0x1d647): undefined reference to `input_event'
arch/x86/built-in.o: In function `xo1_sci_intr':
olpc-xo1-sci.c:(.text+0x1d78e): undefined reference to `input_event'
olpc-xo1-sci.c:(.text+0x1d7a3): undefined reference to `input_event'
olpc-xo1-sci.c:(.text+0x1d7be): undefined reference to `input_event'
arch/x86/built-in.o:olpc-xo1-sci.c:(.text+0x1d7d3): more undefined references to `input_event' follow
arch/x86/built-in.o: In function `free_lid_switch':
olpc-xo1-sci.c:(.text+0x1d7fd): undefined reference to `input_unregister_device'
olpc-xo1-sci.c:(.text+0x1d807): undefined reference to `input_free_device'
arch/x86/built-in.o: In function `setup_lid_switch':
olpc-xo1-sci.c:(.devinit.text+0x155): undefined reference to `input_allocate_device'
olpc-xo1-sci.c:(.devinit.text+0x1a4): undefined reference to `input_register_device'
olpc-xo1-sci.c:(.devinit.text+0x1ce): undefined reference to `input_unregister_device'
olpc-xo1-sci.c:(.devinit.text+0x1d8): undefined reference to `input_free_device'
arch/x86/built-in.o: In function `xo1_sci_probe':
olpc-xo1-sci.c:(.devinit.text+0x235): undefined reference to `input_allocate_device'
olpc-xo1-sci.c:(.devinit.text+0x285): undefined reference to `input_register_device'
olpc-xo1-sci.c:(.devinit.text+0x299): undefined reference to `input_free_device'
olpc-xo1-sci.c:(.devinit.text+0x2e1): undefined reference to `input_register_device'
olpc-xo1-sci.c:(.devinit.text+0x2f5): undefined reference to `input_free_device'
olpc-xo1-sci.c:(.devinit.text+0x54c): undefined reference to `input_allocate_device'
In the long run, fixing this driver kconfig to be tristate instead of bool
would be a very good change.
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Andres Salomon <dilinger@queued.net> Cc: Chris Ball <cjb@laptop.org> Cc: Jon Nettleton <jon.nettleton@gmail.com> Cc: Daniel Drake <dsd@laptop.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Alex Shi [Sat, 3 Nov 2012 00:42:04 +0000 (11:42 +1100)]
arch/x86/platform/uv: fix incorrect tlb flush all issue
The flush tlb optimization code has logical issue on UV platform. It
doesn't flush the full range at all, since it simply ignores its 'end'
parameter (and hence also the "all" indicator) in uv_flush_tlb_others()
function.
Cliff's notes:
: I tested the patch on a UV. It has the effect of either clearing 1 or all
: TLBs in a cpu. I added some debugging to test for the cases when clearing
: all TLBs is overkill, and in practice it happens very seldom.
Reported-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Alex Shi <alex.shi@intel.com> Signed-off-by: Cliff Wickman <cpw@sgi.com> Tested-by: Cliff Wickman <cpw@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Andrew Morton [Sat, 3 Nov 2012 00:42:04 +0000 (11:42 +1100)]
arch/x86/tools/insn_sanity.c: identify source of messages
The kernel build prints:
Building modules, stage 2.
TEST posttest
MODPOST 3821 modules
TEST posttest
Success: decoded and checked 1000000 random instructions with 0 errors (seed:0xaac4bc47)
CC arch/x86/boot/a20.o
CC arch/x86/boot/cmdline.o
AS arch/x86/boot/copy.o
HOSTCC arch/x86/boot/mkcpustr
CC arch/x86/boot/cpucheck.o
CC arch/x86/boot/early_serial_console.o
which is irritating because you don't know what program is proudly
pronouncing its success.
So, as described in "console mode programming user interface guidelines
version 101" which doesn't exist, change this program to identify the
source of its messages.
Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:03 +0000 (11:42 +1100)]
x86 numa: don't check if node is NUMA_NO_NODE
If we aren't debugging per_cpu maps, the cpu's node is stored in per_cpu
variable numa_node. If `node' is NUMA_NO_NODE, it means the caller wants
to clear the cpu's node. So we should also call set_cpu_numa_node() in
this case.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Ingo Molnar <mingo@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Wen Congyang [Sat, 3 Nov 2012 00:42:00 +0000 (11:42 +1100)]
x86 cpu_hotplug: unmap cpu2node when the cpu is hotremoved
When a cpu is hotplugged, we call acpi_map_cpu2node() in
_acpi_map_lsapic() to store the cpu's node. But we don't clear the cpu's
node in acpi_unmap_lsapic() when this cpu is hotremoved. If the node is
also hotremoved, We will get the following messages:
The reason is that: the cpu's node is not NUMA_NO_NODE, we will call
alloc_pages_exact_node() to alloc memory on the node, but the node is
offlined.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
fs/block_dev.c: page cache wrongly left invalidated after revalidate_disk()
We found that bdev->bd_invalidated was left set once revalidate_disk() is
called, which results in page cache flush every time that device is open.
Specifically, we found this problem in MD block device. Once we resize a
MD device, mdadm --monitor periodically flush all page cache for that
device every 60 or 1000 seconds when it opens the device.
This bug lies since at least 3.2.0 till the latest kernel(3.6.2).
Patch is attached.
The following steps will reproduce the problem.
1. prepair a block device(ex. /dev/sdb).
2. create two partitions.
NeilBrown [Sat, 3 Nov 2012 00:42:00 +0000 (11:42 +1100)]
vfs: d_obtain_alias() needs to use "/" as default name.
NFS appears to use d_obtain_alias() to create the root dentry rather than
d_make_root. This can cause 'prepend_path()' to complain that the root
has a weird name if an NFS filesystem is lazily unmounted. e.g. if
"/mnt" is an NFS mount then
{ cd /mnt; umount -l /mnt ; ls -l /proc/self/cwd; }
will cause a WARN message like
WARNING: at /home/git/linux/fs/dcache.c:2624 prepend_path+0x1d7/0x1e0()
...
Root dentry has weird name <>
to appear in kernel logs.
So change d_obtain_alias() to use "/" rather than "" as the anonymous
name.
Signed-off-by: NeilBrown <neilb@suse.de> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This patch below does what Paul McKenney suggested in the previous thread.
Signed-off-by: Dave Jones <davej@redhat.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Paul Moore <paul@paul-moore.com> Cc: Eric Paris <eparis@parisplace.org> Cc: James Morris <jmorris@namei.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Corey Minyard [Sat, 3 Nov 2012 00:41:59 +0000 (11:41 +1100)]
CRIS: Fix I/O macros
The inb/outb macros for CRIS are broken from a number of points of view,
missing () around parameters and they have an unprotected if statement in
them. This was breaking the compile of IPMI on CRIS and thus I was being
annoyed by build regressions, so I fixed them.
Plus I don't think they would have worked at all, since the data values
were missing "&" and the outsl had a "3" instead of a "4" for the size.
From what I can tell, this stuff is not used at all, so this can't be any
more broken than it was before, anyway.
Maxim Levitsky [Sat, 3 Nov 2012 00:41:58 +0000 (11:41 +1100)]
memstick: ms_block: fix compile issue
As suggested by Geert Uytterhoeven:
: http://kisskb.ellerman.id.au/kisskb/buildresult/7280352/
: arch/m68k/include/asm/hardirq.h:23:20: error: expected ')' before 'DRIVER_NAME'
: make[4]: *** [drivers/memstick/core/ms_block.o] Error 1
:
: The reason for this is that pr_fmt() references DRIVER_NAME and is defined
: before the first include, while DRIVER_NAME is only defined in ms_block.h,
: which is the last included file. If any subsequent include file uses
: pr_fmt() (e.g. the call to pr_crit() in arch/m68k/include/asm/hardirq.h),
: this causes a build failure.
:
: I suggest moving the DRIVER_NAME define to ms_block.c. Cfr. memstick.c
: and mspro_block.c, who already have their own definition.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Alex Dubov <oakad@yahoo.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
7b540d0646ce ("proc_map_files_readdir(): don't bother with grabbing
files") switched proc_map_files_readdir() to use @f_mode directly instead of
grabbing @file reference, but same time the test for @vm_file presence was
lost leading to nil dereference. The patch brings the test back.
The all proc_map_files feature is CONFIG_\10CHECKPOINT_RESTORE wrapped
(which is set to 'n' by default) so the bug doesn't affect regular
kernels.
The regression is 3.7-rc1 only as far as I can tell.
[gorcunov@openvz.org: provided changelog] Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Acked-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Mel Gorman [Sat, 3 Nov 2012 00:41:57 +0000 (11:41 +1100)]
mm: vmscan: scale number of pages reclaimed by reclaim/compaction only in direct reclaim
Jiri Slaby reported the following:
(It's an effective revert of "mm: vmscan: scale number of pages
reclaimed by reclaim/compaction based on failures".)
Given kswapd had hours of runtime in ps/top output yesterday in the
morning and after the revert it's now 2 minutes in sum for the last 24h,
I would say, it's gone.
The intention of the patch in question was to compensate for the loss of
lumpy reclaim. Part of the reason lumpy reclaim worked is because it
aggressively reclaimed pages and this patch was meant to be a sane
compromise.
When compaction fails, it gets deferred and both compaction and
reclaim/compaction is deferred avoid excessive reclaim. However, since
commit c6543459 ("mm: remove __GFP_NO_KSWAPD"), kswapd is woken up each
time and continues reclaiming which was not taken into account when the
patch was developed.
As it is not taking deferred compaction into account in this path it scans
aggressively before falling out and making the compaction_deferred check
in compaction_ready. This patch avoids kswapd scaling pages for reclaim
and leaves the aggressive reclaim to the process attempting the THP
allocation.
Signed-off-by: Mel Gorman <mgorman@suse.de> Reported-by: Jiri Slaby <jslaby@suse.cz> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
projects / karo-tx-linux.git / log