kernel-hacking-2024-linux-s.../mm
Vladimir Davydov 8f4fc071b1 gfp: add __GFP_NOACCOUNT
Not all kmem allocations should be accounted to memcg.  The following
patch gives an example when accounting of a certain type of allocations to
memcg can effectively result in a memory leak.  This patch adds the
__GFP_NOACCOUNT flag which if passed to kmalloc and friends will force the
allocation to go through the root cgroup.  It will be used by the next
patch.

Note, since in case of kmemleak enabled each kmalloc implies yet another
allocation from the kmemleak_object cache, we add __GFP_NOACCOUNT to
gfp_kmemleak_mask.

Alternatively, we could introduce a per kmem cache flag disabling
accounting for all allocations of a particular kind, but (a) we would not
be able to bypass accounting for kmalloc then and (b) a kmem cache with
this flag set could not be merged with a kmem cache without this flag,
which would increase the number of global caches and therefore
fragmentation even if the memory cgroup controller is not used.

Despite its generic name, currently __GFP_NOACCOUNT disables accounting
only for kmem allocations while user page allocations are always charged.
To catch abusing of this flag, a warning is issued on an attempt of
passing it to mem_cgroup_try_charge.

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <stable@vger.kernel.org>	[4.0.x]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-05-14 17:55:51 -07:00
..
kasan mm/mempool.c: kasan: poison mempool elements 2015-04-15 16:35:20 -07:00
backing-dev.c
balloon_compaction.c
bootmem.c
cleancache.c cleancache: remove limit on the number of cleancache enabled filesystems 2015-04-14 16:49:03 -07:00
cma.c mm: cma: add trace events for CMA allocations and freeings 2015-04-15 16:35:19 -07:00
cma.h mm: cma: allocation trigger 2015-04-14 16:49:00 -07:00
cma_debug.c mm/cma_debug.c: remove blank lines before DEFINE_SIMPLE_ATTRIBUTE() 2015-04-15 16:35:20 -07:00
compaction.c mm/compaction.c: fix "suitable_migration_target() unused" warning 2015-04-15 16:35:20 -07:00
debug-pagealloc.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-16 23:27:56 -04:00
frontswap.c
gup.c mm: use READ_ONCE() for non-scalar types 2015-04-15 16:35:18 -07:00
highmem.c
huge_memory.c thp: cleanup khugepaged startup 2015-04-15 16:35:19 -07:00
hugetlb.c mm: hugetlb: cleanup using paeg_huge_active() 2015-04-15 16:35:19 -07:00
hugetlb_cgroup.c
hwpoison-inject.c mm/hwpoison-inject: check PageLRU of hpage 2015-05-05 17:10:11 -07:00
init-mm.c
internal.h mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
interval_tree.c
Kconfig mm: cma: debugfs interface 2015-04-14 16:49:00 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c gfp: add __GFP_NOACCOUNT 2015-05-14 17:55:51 -07:00
ksm.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
list_lru.c
maccess.c
madvise.c
Makefile mm: move memtest under mm 2015-04-14 16:49:06 -07:00
memblock.c mm/memblock.c: add debug output for memblock_add() 2015-04-15 16:35:19 -07:00
memcontrol.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
memory-failure.c mm: soft-offline: fix num_poisoned_pages counting on concurrent events 2015-05-05 17:10:10 -07:00
memory.c mm: new pfn_mkwrite same as page_mkwrite for VM_PFNMAP 2015-04-15 16:35:20 -07:00
memory_hotplug.c mm: hugetlb: cleanup using paeg_huge_active() 2015-04-15 16:35:19 -07:00
mempolicy.c mm, thp: really limit transparent hugepage allocation to local node 2015-04-14 16:49:03 -07:00
mempool.c mm/mempool.c: kasan: poison mempool elements 2015-04-15 16:35:20 -07:00
memtest.c memtest: use phys_addr_t for physical addresses 2015-04-14 16:49:06 -07:00
migrate.c mm/migrate: check-before-clear PageSwapCache 2015-04-15 16:35:17 -07:00
mincore.c
mlock.c mm: move mm_populate()-related code to mm/gup.c 2015-04-14 16:49:00 -07:00
mm_init.c
mmap.c mm/mmap.c: use while instead of if+goto 2015-04-15 16:35:19 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c mm: numa: preserve PTE write permissions across a NUMA hinting fault 2015-03-25 16:20:31 -07:00
mremap.c mm/mremap.c: clean up goto just return ERR_PTR 2015-04-15 16:35:18 -07:00
msync.c
nobootmem.c
nommu.c nommu: use __vfs_read() 2015-04-11 22:27:56 -04:00
oom_kill.c mm/oom_kill.c: fix typo in comment 2015-04-15 16:35:16 -07:00
page-writeback.c writeback: use |1 instead of +1 to protect against div by zero 2015-04-23 10:36:33 -06:00
page_alloc.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
page_counter.c
page_ext.c
page_io.c direct_IO: remove rw from a_ops->direct_IO() 2015-04-11 22:29:45 -04:00
page_isolation.c mm/page_alloc.c: call kernel_map_pages in unset_migrateype_isolate 2015-03-25 16:20:30 -07:00
page_owner.c
pagewalk.c mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers 2015-03-25 16:20:30 -07:00
percpu-km.c
percpu-vm.c
percpu.c percpu: Fix trivial typos in comments 2015-03-24 13:41:54 -04:00
pgtable-generic.c
process_vm_access.c process_vm_access: switch to {compat_,}import_iovec() 2015-04-11 22:27:12 -04:00
quicklist.c
readahead.c
rmap.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
shmem.c VFS: assorted weird filesystems: d_inode() annotations 2015-04-15 15:06:58 -04:00
slab.c mm: remove GFP_THISNODE 2015-04-14 16:49:03 -07:00
slab.h
slab_common.c
slob.c slob: make slob_alloc_node() static and remove EXPORT_SYMBOL() 2015-04-14 16:48:59 -07:00
slub.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
sparse-vmemmap.c
sparse.c
swap.c mm: don't call __page_cache_release for hugetlb 2015-04-15 16:35:19 -07:00
swap_cgroup.c
swap_state.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
swapfile.c mm: remove rest of ACCESS_ONCE() usages 2015-04-15 16:35:18 -07:00
truncate.c mm: rename deactivate_page to deactivate_file_page 2015-04-15 16:35:17 -07:00
util.c mm: uninline and cleanup page-mapping related helpers 2015-04-15 16:35:19 -07:00
vmacache.c
vmalloc.c mm/vmalloc: get rid of dirty bitmap inside vmap_block structure 2015-04-15 16:35:18 -07:00
vmpressure.c
vmscan.c
vmstat.c
workingset.c
zbud.c
zpool.c
zsmalloc.c zsmalloc: remove extra cond_resched() in __zs_compact 2015-04-15 16:35:22 -07:00
zswap.c