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mm/slub.c: record final state of slub action in deactivate_slab() 

If __cmpxchg_double_slab() fails and (l != m), current code records
transition states of slub action.

Update the action after __cmpxchg_double_slab() success to record the
final state.

[akpm@linux-foundation.org: more whitespace cleanup]
Link: http://lkml.kernel.org/r/20181107013119.3816-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
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 2018-12-28 00:33:13 -08:00 committed by Linus Torvalds
parent 6159d0f5c0
commit 88349a2837
1 changed files with 7 additions and 14 deletions
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21
mm/slub.c
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@ -2131,26 +2131,15 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page,
} }
if (l != m) { if (l != m) {
if (l == M_PARTIAL) if (l == M_PARTIAL)
remove_partial(n, page); remove_partial(n, page);
else if (l == M_FULL) else if (l == M_FULL)
remove_full(s, n, page); remove_full(s, n, page);
if (m == M_PARTIAL) { if (m == M_PARTIAL)
add_partial(n, page, tail); add_partial(n, page, tail);
stat(s, tail); else if (m == M_FULL)
} else if (m == M_FULL) {
stat(s, DEACTIVATE_FULL);
add_full(s, n, page); add_full(s, n, page);
}
} }
l = m; l = m;
@ -2163,7 +2152,11 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page,
if (lock) if (lock)
spin_unlock(&n->list_lock); spin_unlock(&n->list_lock);
if (m == M_FREE) { if (m == M_PARTIAL)
stat(s, tail);
else if (m == M_FULL)
stat(s, DEACTIVATE_FULL);
else if (m == M_FREE) {
stat(s, DEACTIVATE_EMPTY); stat(s, DEACTIVATE_EMPTY);
discard_slab(s, page); discard_slab(s, page);
stat(s, FREE_SLAB); stat(s, FREE_SLAB);