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mm: memcontrol: fix slub memory accounting

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[ Upstream commit 96403bfe50c344b587ea53894954a9d152af1c9d ]

SLUB currently account kmalloc() and kmalloc_node() allocations larger
than order-1 page per-node.  But it forget to update the per-memcg
vmstats.  So it can lead to inaccurate statistics of "slab_unreclaimable"
which is from memory.stat.  Fix it by using mod_lruvec_page_state instead
of mod_node_page_state.

Link: https://lkml.kernel.org/r/20210223092423.42420-1-songmuchun@bytedance.com
Fixes: 6a486c0ad4dc ("mm, sl[ou]b: improve memory accounting")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Muchun Song 2021-02-24 12:04:26 -08:00 committed by Greg Kroah-Hartman
parent 026e07bc0a
commit cbb86d6a5d
2 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
mm/slab_common.c
View File

@ -836,8 +836,8 @@ void *kmalloc_order(size_t size, gfp_t flags, unsigned int order)
page = alloc_pages(flags, order);
if (likely(page)) {
ret = page_address(page);
mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B,
PAGE_SIZE << order);
mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B,
PAGE_SIZE << order);
}
ret = kasan_kmalloc_large(ret, size, flags);
/* As ret might get tagged, call kmemleak hook after KASAN. */

8
mm/slub.c
View File

@ -3984,8 +3984,8 @@ static void *kmalloc_large_node(size_t size, gfp_t flags, int node)
page = alloc_pages_node(node, flags, order);
if (page) {
ptr = page_address(page);
mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B,
PAGE_SIZE << order);
mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B,
PAGE_SIZE << order);
}
return kmalloc_large_node_hook(ptr, size, flags);
@ -4116,8 +4116,8 @@ void kfree(const void *x)
BUG_ON(!PageCompound(page));
kfree_hook(object);
mod_node_page_state(page_pgdat(page), NR_SLAB_UNRECLAIMABLE_B,
-(PAGE_SIZE << order));
mod_lruvec_page_state(page, NR_SLAB_UNRECLAIMABLE_B,
-(PAGE_SIZE << order));
__free_pages(page, order);
return;
}