From: Muchun Song <[email protected]> [ 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/[email protected] Fixes: 6a486c0ad4dc ("mm, sl[ou]b: improve memory accounting") Signed-off-by: Muchun Song <[email protected]> Reviewed-by: Shakeel Butt <[email protected]> Reviewed-by: Roman Gushchin <[email protected]> Reviewed-by: Michal Koutný <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Vladimir Davydov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Sasha Levin <[email protected]> --- mm/slab_common.c | 4 ++-- mm/slub.c | 8 ++++---- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/slab_common.c b/mm/slab_common.c index e981c80d216c2..0b775cb5c1089 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -837,8 +837,8 @@ 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. */ diff --git a/mm/slub.c b/mm/slub.c index b22a4b101c846..69dacc61b8435 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -3999,8 +3999,8 @@ 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); @@ -4131,8 +4131,8 @@ 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; } -- 2.27.0
