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authorMatthew Wilcox <mawilcox@microsoft.com>2018-06-07 17:08:26 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:37 -0700
commitd4fc5069a39405d67937b25c0dc9249a9b6c50f1 (patch)
treed4d41d5f48a29dddb255efb6a04def329a0a0e2d /include
parent1d40a5ea01d53251c23c7be541d3f4a656cfc537 (diff)
downloadlinux-d4fc5069a39405d67937b25c0dc9249a9b6c50f1.tar.bz2
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 'include')
-rw-r--r--include/linux/mm_types.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 3a554fdf45c2..6f153f2fab50 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -83,7 +83,7 @@ struct page {
/* See page-flags.h for the definition of PAGE_MAPPING_FLAGS */
struct address_space *mapping;
- void *s_mem; /* slab first object */
+ struct kmem_cache *slab_cache; /* SL[AU]B: Pointer to slab */
atomic_t compound_mapcount; /* first tail page */
/* page_deferred_list().next -- second tail page */
};
@@ -194,7 +194,7 @@ struct page {
spinlock_t ptl;
#endif
#endif
- struct kmem_cache *slab_cache; /* SL[AU]B: Pointer to slab */
+ void *s_mem; /* slab first object */
};
#ifdef CONFIG_MEMCG