diff options
| author | Joonsoo Kim | 2014-10-10 00:26:15 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2014-10-10 04:25:51 +0200 |
| commit | a561ce00b09e1545953340deb5bef1036d7442de (patch) | |
| tree | bc24fe793fb8458abbf291b4e48a69d097cce493 /mm/slub.c | |
| parent | topology: add support for node_to_mem_node() to determine the fallback node (diff) | |
| download | kernel-qcow2-linux-a561ce00b09e1545953340deb5bef1036d7442de.tar.gz kernel-qcow2-linux-a561ce00b09e1545953340deb5bef1036d7442de.tar.xz kernel-qcow2-linux-a561ce00b09e1545953340deb5bef1036d7442de.zip | |
slub: fall back to node_to_mem_node() node if allocating on memoryless node
Update the SLUB code to search for partial slabs on the nearest node with
memory in the presence of memoryless nodes. Additionally, do not consider
it to be an ALLOC_NODE_MISMATCH (and deactivate the slab) when a
memoryless-node specified allocation goes off-node.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Han Pingtian <hanpt@linux.vnet.ibm.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Anton Blanchard <anton@samba.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/mm/slub.c b/mm/slub.c index fa86e5845093..1050d7db5734 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1699,7 +1699,12 @@ static void *get_partial(struct kmem_cache *s, gfp_t flags, int node, struct kmem_cache_cpu *c) { void *object; - int searchnode = (node == NUMA_NO_NODE) ? numa_mem_id() : node; + int searchnode = node; + + if (node == NUMA_NO_NODE) + searchnode = numa_mem_id(); + else if (!node_present_pages(node)) + searchnode = node_to_mem_node(node); object = get_partial_node(s, get_node(s, searchnode), c, flags); if (object || node != NUMA_NO_NODE) @@ -2280,11 +2285,18 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, redo: if (unlikely(!node_match(page, node))) { - stat(s, ALLOC_NODE_MISMATCH); - deactivate_slab(s, page, c->freelist); - c->page = NULL; - c->freelist = NULL; - goto new_slab; + int searchnode = node; + + if (node != NUMA_NO_NODE && !node_present_pages(node)) + searchnode = node_to_mem_node(node); + + if (unlikely(!node_match(page, searchnode))) { + stat(s, ALLOC_NODE_MISMATCH); + deactivate_slab(s, page, c->freelist); + c->page = NULL; + c->freelist = NULL; + goto new_slab; + } } /* |