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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2008-04-08 17:41:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-08 18:25:53 -0700
commit41e3355de052693c7a0cad74b845148d262edadf (patch)
tree7d40851015f1a90a9c6386c3e880ed23ac5127cb
parentbb070e43497d4fcfea7d8b52003fe1376c218343 (diff)
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memcg: fix node_state handling
This should be N_NORMAL_MEMORY. N_NORMAL_MEMORY is "true" if a node has memory for the kernel. N_HIGH_MEMORY is "true" if a node has memory for HIGHMEM. (If CONFIG_HIGHMEM=n, always "true") This check is used for testing whether we can use kmalloc_node() on a node. Then, if there is a node which only contains HIGHMEM, the system will call kmalloc_node() which doesn't contain memory for the kernel. If it happens under SLUB, the kernel will panic. I think this only happens on x86_32-numa. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/memcontrol.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 23b5fa4..2e0bfc9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -978,7 +978,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
{
struct mem_cgroup_per_node *pn;
struct mem_cgroup_per_zone *mz;
- int zone;
+ int zone, tmp = node;
/*
* This routine is called against possible nodes.
* But it's BUG to call kmalloc() against offline node.
@@ -987,10 +987,9 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *mem, int node)
* never be onlined. It's better to use memory hotplug callback
* function.
*/
- if (node_state(node, N_HIGH_MEMORY))
- pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, node);
- else
- pn = kmalloc(sizeof(*pn), GFP_KERNEL);
+ if (!node_state(node, N_NORMAL_MEMORY))
+ tmp = -1;
+ pn = kmalloc_node(sizeof(*pn), GFP_KERNEL, tmp);
if (!pn)
return 1;