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authorMatthew Wilcox <mawilcox@microsoft.com>2018-06-08 02:08:26 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-08 02:34:37 +0200
commitd4fc5069a39405d67937b25c0dc9249a9b6c50f1 (patch)
treed4d41d5f48a29dddb255efb6a04def329a0a0e2d /mm/slub.c
parentmm: mark pages in use for page tables (diff)
downloadlinux-d4fc5069a39405d67937b25c0dc9249a9b6c50f1.tar.xz
linux-d4fc5069a39405d67937b25c0dc9249a9b6c50f1.zip
mm: switch s_mem and slab_cache in struct page
This will allow us to store slub's counters in the same bits as slab's s_mem. slub now needs to set page->mapping to NULL as it frees the page, just like slab does. Link: http://lkml.kernel.org/r/20180518194519.3820-5-willy@infradead.org Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com> Acked-by: Christoph Lameter <cl@linux.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Jérôme Glisse <jglisse@redhat.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 48f75872c356..0170ea8a97fe 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1695,6 +1695,7 @@ static void __free_slab(struct kmem_cache *s, struct page *page)
__ClearPageSlab(page);
page_mapcount_reset(page);
+ page->mapping = NULL;
if (current->reclaim_state)
current->reclaim_state->reclaimed_slab += pages;
memcg_uncharge_slab(page, order, s);