| Commit message (Collapse) | Author | Age |
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Give s_next and s_stop slab-specific names instead of exporting
"s_next" and "s_stop".
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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This patch shares s_next and s_stop between slab and slub.
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Put the definitions for the kmem_cache_node structures together so that
we have one structure. That will allow us to create more common fields in
the future which could yield more opportunities to share code.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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The list3 or l3 pointers are pointing to per node structures. Reflect
that in the names of variables used.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Extract the optimized lookup functions from slub and put them into
slab_common.c. Then make slab use these functions as well.
Joonsoo notes that this fixes some issues with constant folding which
also reduces the code size for slub.
https://lkml.org/lkml/2012/10/20/82
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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The kmalloc array is created in similar ways in both SLAB
and SLUB. Create a common function and have both allocators
call that function.
V1->V2:
Whitespace cleanup
Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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SLAB allows us to tune a particular cache behavior with tunables. When
creating a new memcg cache copy, we'd like to preserve any tunables the
parent cache already had.
This could be done by an explicit call to do_tune_cpucache() after the
cache is created. But this is not very convenient now that the caches are
created from common code, since this function is SLAB-specific.
Another method of doing that is taking advantage of the fact that
do_tune_cpucache() is always called from enable_cpucache(), which is
called at cache initialization. We can just preset the values, and then
things work as expected.
It can also happen that a root cache has its tunables updated during
normal system operation. In this case, we will propagate the change to
all caches that are already active.
This change will require us to move the assignment of root_cache in
memcg_params a bit earlier. We need this to be already set - which
memcg_kmem_register_cache will do - when we reach __kmem_cache_create()
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When we create caches in memcgs, we need to display their usage
information somewhere. We'll adopt a scheme similar to /proc/meminfo,
with aggregate totals shown in the global file, and per-group information
stored in the group itself.
For the time being, only reads are allowed in the per-group cache.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Implement destruction of memcg caches. Right now, only caches where our
reference counter is the last remaining are deleted. If there are any
other reference counters around, we just leave the caches lying around
until they go away.
When that happens, a destruction function is called from the cache code.
Caches are only destroyed in process context, so we queue them up for
later processing in the general case.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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struct page already has this information. If we start chaining caches,
this information will always be more trustworthy than whatever is passed
into the function.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Allow a memcg parameter to be passed during cache creation. When the slub
allocator is being used, it will only merge caches that belong to the same
memcg. We'll do this by scanning the global list, and then translating
the cache to a memcg-specific cache
Default function is created as a wrapper, passing NULL to the memcg
version. We only merge caches that belong to the same memcg.
A helper is provided, memcg_css_id: because slub needs a unique cache name
for sysfs. Since this is visible, but not the canonical location for slab
data, the cache name is not used, the css_id should suffice.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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For the kmem slab controller, we need to record some extra information in
the kmem_cache structure.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Suleiman Souhlal <suleiman@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <fweisbec@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: JoonSoo Kim <js1304@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Rik van Riel <riel@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Extract the code to do object alignment from the allocators.
Do the alignment calculations in slab_common so that the
__kmem_cache_create functions of the allocators do not have
to deal with alignment.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Use a special function to create kmalloc caches and use that function in
SLAB and SLUB.
Acked-by: Joonsoo Kim <js1304@gmail.com>
Reviewed-by: Glauber Costa <glommer@parallels.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Some flags are used internally by the allocators for management
purposes. One example of that is the CFLGS_OFF_SLAB flag that slab uses
to mark that the metadata for that cache is stored outside of the slab.
No cache should ever pass those as a creation flags. We can just ignore
this bit if it happens to be passed (such as when duplicating a cache in
the kmem memcg patches).
Because such flags can vary from allocator to allocator, we allow them
to make their own decisions on that, defining SLAB_AVAILABLE_FLAGS with
all flags that are valid at creation time. Allocators that doesn't have
any specific flag requirement should define that to mean all flags.
Common code will mask out all flags not belonging to that set.
Acked-by: Christoph Lameter <cl@linux.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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With all the infrastructure in place, we can now have slabinfo_show
done from slab_common.c. A cache-specific function is called to grab
information about the cache itself, since that is still heavily
dependent on the implementation. But with the values produced by it, all
the printing and handling is done from common code.
Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: Christoph Lameter <cl@linux.com>
CC: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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The header format is highly similar between slab and slub. The main
difference lays in the fact that slab may optionally have statistics
added here in case of CONFIG_SLAB_DEBUG, while the slub will stick them
somewhere else.
By making sure that information conditionally lives inside a
globally-visible CONFIG_DEBUG_SLAB switch, we can move the header
printing to a common location.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Christoph Lameter <cl@linux.com>
CC: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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This patch moves all the common machinery to slabinfo processing
to slab_common.c. We can do better by noticing that the output is
heavily common, and having the allocators to just provide finished
information about this. But after this first step, this can be done
easier.
Signed-off-by: Glauber Costa <glommer@parallels.com>
Acked-by: Christoph Lameter <cl@linux.com>
CC: David Rientjes <rientjes@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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This reverts commit 96d17b7be0a9849d381442030886211dbb2a7061 which
caused the following errors at boot:
[ 1.114885] kobject (ffff88001a802578): tried to init an initialized object, something is seriously wrong.
[ 1.114885] Pid: 1, comm: swapper/0 Tainted: G W 3.6.0-rc1+ #6
[ 1.114885] Call Trace:
[ 1.114885] [<ffffffff81273f37>] kobject_init+0x87/0xa0
[ 1.115555] [<ffffffff8127426a>] kobject_init_and_add+0x2a/0x90
[ 1.115555] [<ffffffff8127c870>] ? sprintf+0x40/0x50
[ 1.115555] [<ffffffff81124c60>] sysfs_slab_add+0x80/0x210
[ 1.115555] [<ffffffff81100175>] kmem_cache_create+0xa5/0x250
[ 1.115555] [<ffffffff81cf24cd>] ? md_init+0x144/0x144
[ 1.115555] [<ffffffff81cf25b6>] local_init+0xa4/0x11b
[ 1.115555] [<ffffffff81cf24e1>] dm_init+0x14/0x45
[ 1.115836] [<ffffffff810001ba>] do_one_initcall+0x3a/0x160
[ 1.116834] [<ffffffff81cc2c90>] kernel_init+0x133/0x1b7
[ 1.117835] [<ffffffff81cc25c4>] ? do_early_param+0x86/0x86
[ 1.117835] [<ffffffff8171aff4>] kernel_thread_helper+0x4/0x10
[ 1.118401] [<ffffffff81cc2b5d>] ? start_kernel+0x33f/0x33f
[ 1.119832] [<ffffffff8171aff0>] ? gs_change+0xb/0xb
[ 1.120325] ------------[ cut here ]------------
[ 1.120835] WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xc1/0xf0()
[ 1.121437] sysfs: cannot create duplicate filename '/kernel/slab/:t-0000016'
[ 1.121831] Modules linked in:
[ 1.122138] Pid: 1, comm: swapper/0 Tainted: G W 3.6.0-rc1+ #6
[ 1.122831] Call Trace:
[ 1.123074] [<ffffffff81195ce1>] ? sysfs_add_one+0xc1/0xf0
[ 1.123833] [<ffffffff8103adfa>] warn_slowpath_common+0x7a/0xb0
[ 1.124405] [<ffffffff8103aed1>] warn_slowpath_fmt+0x41/0x50
[ 1.124832] [<ffffffff81195ce1>] sysfs_add_one+0xc1/0xf0
[ 1.125337] [<ffffffff81195eb3>] create_dir+0x73/0xd0
[ 1.125832] [<ffffffff81196221>] sysfs_create_dir+0x81/0xe0
[ 1.126363] [<ffffffff81273d3d>] kobject_add_internal+0x9d/0x210
[ 1.126832] [<ffffffff812742a3>] kobject_init_and_add+0x63/0x90
[ 1.127406] [<ffffffff81124c60>] sysfs_slab_add+0x80/0x210
[ 1.127832] [<ffffffff81100175>] kmem_cache_create+0xa5/0x250
[ 1.128384] [<ffffffff81cf24cd>] ? md_init+0x144/0x144
[ 1.128833] [<ffffffff81cf25b6>] local_init+0xa4/0x11b
[ 1.129831] [<ffffffff81cf24e1>] dm_init+0x14/0x45
[ 1.130305] [<ffffffff810001ba>] do_one_initcall+0x3a/0x160
[ 1.130831] [<ffffffff81cc2c90>] kernel_init+0x133/0x1b7
[ 1.131351] [<ffffffff81cc25c4>] ? do_early_param+0x86/0x86
[ 1.131830] [<ffffffff8171aff4>] kernel_thread_helper+0x4/0x10
[ 1.132392] [<ffffffff81cc2b5d>] ? start_kernel+0x33f/0x33f
[ 1.132830] [<ffffffff8171aff0>] ? gs_change+0xb/0xb
[ 1.133315] ---[ end trace 2703540871c8fab7 ]---
[ 1.133830] ------------[ cut here ]------------
[ 1.134274] WARNING: at lib/kobject.c:196 kobject_add_internal+0x1f5/0x210()
[ 1.134829] kobject_add_internal failed for :t-0000016 with -EEXIST, don't try to register things with the same name in the same directory.
[ 1.135829] Modules linked in:
[ 1.136135] Pid: 1, comm: swapper/0 Tainted: G W 3.6.0-rc1+ #6
[ 1.136828] Call Trace:
[ 1.137071] [<ffffffff81273e95>] ? kobject_add_internal+0x1f5/0x210
[ 1.137830] [<ffffffff8103adfa>] warn_slowpath_common+0x7a/0xb0
[ 1.138402] [<ffffffff8103aed1>] warn_slowpath_fmt+0x41/0x50
[ 1.138830] [<ffffffff811955a3>] ? release_sysfs_dirent+0x73/0xf0
[ 1.139419] [<ffffffff81273e95>] kobject_add_internal+0x1f5/0x210
[ 1.139830] [<ffffffff812742a3>] kobject_init_and_add+0x63/0x90
[ 1.140429] [<ffffffff81124c60>] sysfs_slab_add+0x80/0x210
[ 1.140830] [<ffffffff81100175>] kmem_cache_create+0xa5/0x250
[ 1.141829] [<ffffffff81cf24cd>] ? md_init+0x144/0x144
[ 1.142307] [<ffffffff81cf25b6>] local_init+0xa4/0x11b
[ 1.142829] [<ffffffff81cf24e1>] dm_init+0x14/0x45
[ 1.143307] [<ffffffff810001ba>] do_one_initcall+0x3a/0x160
[ 1.143829] [<ffffffff81cc2c90>] kernel_init+0x133/0x1b7
[ 1.144352] [<ffffffff81cc25c4>] ? do_early_param+0x86/0x86
[ 1.144829] [<ffffffff8171aff4>] kernel_thread_helper+0x4/0x10
[ 1.145405] [<ffffffff81cc2b5d>] ? start_kernel+0x33f/0x33f
[ 1.145828] [<ffffffff8171aff0>] ? gs_change+0xb/0xb
[ 1.146313] ---[ end trace 2703540871c8fab8 ]---
Conflicts:
mm/slub.c
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Do the initial settings of the fields in common code. This will allow us
to push more processing into common code later and improve readability.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Shift the allocations to common code. That way the allocation and
freeing of the kmem_cache structures is handled by common code.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Simplify locking by moving the slab_add_sysfs after all locks have been
dropped. Eases the upcoming move to provide sysfs support for all
allocators.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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The slab aliasing logic causes some strange contortions in slub. So add
a call to deal with aliases to slab_common.c but disable it for other
slab allocators by providng stubs that fail to create aliases.
Full general support for aliases will require additional cleanup passes
and more standardization of fields in kmem_cache.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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What is done there can be done in __kmem_cache_shutdown.
This affects RCU handling somewhat. On rcu free all slab allocators do
not refer to other management structures than the kmem_cache structure.
Therefore these other structures can be freed before the rcu deferred
free to the page allocator occurs.
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Make all allocators use the "kmem_cache" slabname for the "kmem_cache"
structure.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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kmem_cache_destroy does basically the same in all allocators.
Extract common code which is easy since we already have common mutex
handling.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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Use the mutex definition from SLAB and make it the common way to take a sleeping lock.
This has the effect of using a mutex instead of a rw semaphore for SLUB.
SLOB gains the use of a mutex for kmem_cache_create serialization.
Not needed now but SLOB may acquire some more features later (like slabinfo
/ sysfs support) through the expansion of the common code that will
need this.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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All allocators have some sort of support for the bootstrap status.
Setup a common definition for the boot states and make all slab
allocators use that definition.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Reviewed-by: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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