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mm/slub: reset cpu_slab's pointer in deactivate_slab()

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Each time a slab is deactivated, the page and freelist pointer should be
reset.

This patch just merges these two options into deactivate_slab().

Link: http://lkml.kernel.org/r/20170507031215.3130-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Wei Yang 2017-07-06 15:36:25 -07:00 committed by Linus Torvalds
parent 66fdbe5203
commit d4ff6d35f6
1 changed files with 8 additions and 13 deletions
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21
mm/slub.c
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@ -1993,7 +1993,7 @@ static void init_kmem_cache_cpus(struct kmem_cache *s)
* Remove the cpu slab
*/
static void deactivate_slab(struct kmem_cache *s, struct page *page,
void *freelist)
void *freelist, struct kmem_cache_cpu *c)
{
enum slab_modes { M_NONE, M_PARTIAL, M_FULL, M_FREE };
struct kmem_cache_node *n = get_node(s, page_to_nid(page));
@ -2132,6 +2132,9 @@ redo:
discard_slab(s, page);
stat(s, FREE_SLAB);
}
c->page = NULL;
c->freelist = NULL;
}
/*
@ -2266,11 +2269,9 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain)
static inline void flush_slab(struct kmem_cache *s, struct kmem_cache_cpu *c)
{
stat(s, CPUSLAB_FLUSH);
deactivate_slab(s, c->page, c->freelist);
deactivate_slab(s, c->page, c->freelist, c);
c->tid = next_tid(c->tid);
c->page = NULL;
c->freelist = NULL;
}
/*
@ -2521,9 +2522,7 @@ redo:
if (unlikely(!node_match(page, searchnode))) {
stat(s, ALLOC_NODE_MISMATCH);
deactivate_slab(s, page, c->freelist);
c->page = NULL;
c->freelist = NULL;
deactivate_slab(s, page, c->freelist, c);
goto new_slab;
}
}
@ -2534,9 +2533,7 @@ redo:
* information when the page leaves the per-cpu allocator
*/
if (unlikely(!pfmemalloc_match(page, gfpflags))) {
deactivate_slab(s, page, c->freelist);
c->page = NULL;
c->freelist = NULL;
deactivate_slab(s, page, c->freelist, c);
goto new_slab;
}
@ -2591,9 +2588,7 @@ new_slab:
!alloc_debug_processing(s, page, freelist, addr))
goto new_slab; /* Slab failed checks. Next slab needed */
deactivate_slab(s, page, get_freepointer(s, freelist));
c->page = NULL;
c->freelist = NULL;
deactivate_slab(s, page, get_freepointer(s, freelist), c);
return freelist;
}