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| author | Yasunori Goto <y-goto@jp.fujitsu.com> | 2007-10-16 01:25:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:59 -0700 |
| commit | 58c0a4a7864b2dad6da4090813322fcd29a11c92 (patch) | |
| tree | 239da4074ced93ee6918fdb03e3839ef721191bb /mm/vmscan.c | |
| parent | 37b07e4163f7306aa735a6e250e8d22293e5b8de (diff) | |
| download | lwn-58c0a4a7864b2dad6da4090813322fcd29a11c92.tar.gz lwn-58c0a4a7864b2dad6da4090813322fcd29a11c92.zip | |
Fix panic of cpu online with memory less node
When a cpu is onlined on memory-less-node box, kernel panics due to touch
NULL pointer of pgdat->kswapd. Current kswapd runs only nodes which have
memory. So, calling of set_cpus_allowed() is not necessary for memory-less
node.
This is fix for it.
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index 8fd8ba1c67b4..cb8ad3c6e483 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1694,9 +1694,11 @@ static int __devinit cpu_callback(struct notifier_block *nfb, { pg_data_t *pgdat; cpumask_t mask; + int nid; if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN) { - for_each_online_pgdat(pgdat) { + for_each_node_state(nid, N_HIGH_MEMORY) { + pgdat = NODE_DATA(nid); mask = node_to_cpumask(pgdat->node_id); if (any_online_cpu(mask) != NR_CPUS) /* One of our CPUs online: restore mask */ |