From aedb0eb107961a234f7c38e53da65a8f7ea992a9 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Sat, 21 Oct 2006 10:24:16 -0700 Subject: [PATCH] [PATCH] Slab: Do not fallback to nodes that have not been bootstrapped yet The zonelist may contain zones of nodes that have not been bootstrapped and we will oops if we try to allocate from those zones. So check if the node information for the slab and the node have been setup before attempting an allocation. If it has not been setup then skip that zone. Usually we will not encounter this situation since the slab bootstrap code avoids falling back before we have setup the respective nodes but we seem to have a special needs for pppc. Signed-off-by: Christoph Lameter Acked-by: Andy Whitcroft Cc: Paul Mackerras Cc: Mike Kravetz Cc: Benjamin Herrenschmidt Acked-by: Mel Gorman Acked-by: Will Schmidt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/slab.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/mm/slab.c b/mm/slab.c index 266449d604..84c631f307 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3152,12 +3152,15 @@ void *fallback_alloc(struct kmem_cache *cache, gfp_t flags) struct zone **z; void *obj = NULL; - for (z = zonelist->zones; *z && !obj; z++) + for (z = zonelist->zones; *z && !obj; z++) { + int nid = zone_to_nid(*z); + if (zone_idx(*z) <= ZONE_NORMAL && - cpuset_zone_allowed(*z, flags)) + cpuset_zone_allowed(*z, flags) && + cache->nodelists[nid]) obj = __cache_alloc_node(cache, - flags | __GFP_THISNODE, - zone_to_nid(*z)); + flags | __GFP_THISNODE, nid); + } return obj; } -- 2.39.5