Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [1/4] SLAB: Handle node-not-up case in fallback_alloc() v2 | Date | Thu, 11 Feb 2010 21:54:00 +0100 (CET) |
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When fallback_alloc() runs the node of the CPU might not be initialized yet. Handle this case by allocating in another node.
v2: Try to allocate from all nodes (David Rientjes)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- mm/slab.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)
Index: linux-2.6.32-memhotadd/mm/slab.c =================================================================== --- linux-2.6.32-memhotadd.orig/mm/slab.c +++ linux-2.6.32-memhotadd/mm/slab.c @@ -3188,7 +3188,24 @@ retry: if (local_flags & __GFP_WAIT) local_irq_enable(); kmem_flagcheck(cache, flags); - obj = kmem_getpages(cache, local_flags, numa_node_id()); + + /* + * Node not set up yet? Try one that the cache has been set up + * for. + */ + nid = numa_node_id(); + if (cache->nodelists[nid] == NULL) { + for_each_zone_zonelist(zone, z, zonelist, high_zoneidx) { + nid = zone_to_nid(zone); + if (cache->nodelists[nid]) { + obj = kmem_getpages(cache, local_flags, nid); + if (obj) + break; + } + } + } else + obj = kmem_getpages(cache, local_flags, nid); + if (local_flags & __GFP_WAIT) local_irq_disable(); if (obj) {
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