mm/slab: Fix drain freelist excessively
The drain_freelist is called to drain slabs_free lists for cache reap, cache shrink, memory hotplug callback etc. The tofree parameter should be the number of slab to free instead of the number of slab objects to free. This patch fix the callers that pass # of objects. Make sure they pass # of slabs. Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
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parent
069e2b351d
commit
0fa8103be4
12
mm/slab.c
12
mm/slab.c
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@ -1180,6 +1180,12 @@ static int init_cache_node_node(int node)
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return 0;
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}
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static inline int slabs_tofree(struct kmem_cache *cachep,
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struct kmem_cache_node *n)
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{
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return (n->free_objects + cachep->num - 1) / cachep->num;
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}
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static void __cpuinit cpuup_canceled(long cpu)
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{
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struct kmem_cache *cachep;
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@ -1241,7 +1247,7 @@ free_array_cache:
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n = cachep->node[node];
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if (!n)
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continue;
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drain_freelist(cachep, n, n->free_objects);
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drain_freelist(cachep, n, slabs_tofree(cachep, n));
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}
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}
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@ -1408,7 +1414,7 @@ static int __meminit drain_cache_node_node(int node)
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if (!n)
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continue;
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drain_freelist(cachep, n, n->free_objects);
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drain_freelist(cachep, n, slabs_tofree(cachep, n));
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if (!list_empty(&n->slabs_full) ||
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!list_empty(&n->slabs_partial)) {
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@ -2534,7 +2540,7 @@ static int __cache_shrink(struct kmem_cache *cachep)
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if (!n)
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continue;
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drain_freelist(cachep, n, n->free_objects);
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drain_freelist(cachep, n, slabs_tofree(cachep, n));
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ret += !list_empty(&n->slabs_full) ||
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!list_empty(&n->slabs_partial);
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