The patch titled
Subject: mm: memcontrol: fix slub memory accounting
has been added to the -mm tree. Its filename is
mm-memcontrol-fix-slub-memory-accounting.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-fix-slub-memory-accounting.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-fix-slub-memory-accounting.patch
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------------------------------------------------------
From: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Subject: mm: memcontrol: fix slub memory accounting
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@xxxxxxxxxxxxx
Fixes: 6a486c0ad4dc ("mm, sl[ou]b: improve memory accounting")
Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Reviewed-by: Roman Gushchin <guro@xxxxxx>
Reviewed-by: Michal Koutný <mkoutny@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/slab_common.c | 4 ++--
mm/slub.c | 8 ++++----
2 files changed, 6 insertions(+), 6 deletions(-)
--- a/mm/slab_common.c~mm-memcontrol-fix-slub-memory-accounting
+++ a/mm/slab_common.c
@@ -898,8 +898,8 @@ void *kmalloc_order(size_t size, gfp_t f
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. */
--- a/mm/slub.c~mm-memcontrol-fix-slub-memory-accounting
+++ a/mm/slub.c
@@ -4042,8 +4042,8 @@ static void *kmalloc_large_node(size_t s
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);
@@ -4174,8 +4174,8 @@ 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;
}
_
Patches currently in -mm which might be from songmuchun@xxxxxxxxxxxxx are
mm-memcontrol-optimize-per-lruvec-stats-counter-memory-usage.patch
mm-memcontrol-fix-nr_anon_thps-accounting-in-charge-moving.patch
mm-memcontrol-convert-nr_anon_thps-account-to-pages.patch
mm-memcontrol-convert-nr_file_thps-account-to-pages.patch
mm-memcontrol-convert-nr_shmem_thps-account-to-pages.patch
mm-memcontrol-convert-nr_shmem_pmdmapped-account-to-pages.patch
mm-memcontrol-convert-nr_file_pmdmapped-account-to-pages.patch
mm-memcontrol-make-the-slab-calculation-consistent.patch
mm-memcontrol-replace-the-loop-with-a-list_for_each_entry.patch
mm-memcontrol-fix-swap-undercounting-in-cgroup2.patch
mm-memcontrol-fix-get_active_memcg-return-value.patch
mm-memcontrol-fix-slub-memory-accounting.patch
hugetlb-convert-page_huge_active-hpagemigratable-flag-fix.patch
