In the per cpu partial slub, we may add a full page into node partial
list. like the following scenario:
cpu1 cpu2
in unfreeze_partials in __slab_alloc
...
add_partial(n, page, 1);
alloced from cpu partial, and
set frozen = 1.
second cmpxchg_double_slab()
set frozen = 0
At that time, maybe we'd better to unfreeze it in acquire_slab(). That
let it in 'full list' mode, frozen=0 and freelist = NULL, same as we did
in __slab_alloc()
Signed-off-by: Alex Shi <alex.shi@xxxxxxxxx>
---
mm/slub.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 6fca71c..7846951 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1579,7 +1579,7 @@ static inline void *acquire_slab(struct kmem_cache *s,
new.inuse = page->objects;
VM_BUG_ON(new.frozen);
- new.frozen = 1;
+ new.frozen = freelist != NULL;
} while (!__cmpxchg_double_slab(s, page,
freelist, counters,
--
1.7.0
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