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| author | Toshi Kani <toshi.kani@hp.com> | 2013-11-12 15:08:12 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:09 +0900 |
| commit | d7e0b37a87c39f5c02dd7b5d55c7a3ec2f65b943 (patch) | |
| tree | 15ded33cf0301497fa2dadf03bbb72f338596ac9 | |
| parent | c5320926e370b4cfb8f10c2169e26f960079cf67 (diff) | |
| download | linux-d7e0b37a87c39f5c02dd7b5d55c7a3ec2f65b943.tar.bz2 | |
mm: set N_CPU to node_states during boot
After a system booted, N_CPU is not set to any node as has_cpu shows an
empty line.
# cat /sys/devices/system/node/has_cpu
(show-empty-line)
setup_vmstat() registers its CPU notifier callback,
vmstat_cpuup_callback(), which marks N_CPU to a node when a CPU is put
into online. However, setup_vmstat() is called after all CPUs are
launched in the boot sequence.
Changed setup_vmstat() to mark N_CPU to the nodes with online CPUs at
boot, which is consistent with other operations in
vmstat_cpuup_callback(), i.e. start_cpu_timer() and
refresh_zone_stat_thresholds().
Also added get_online_cpus() to protect the for_each_online_cpu() loop.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Acked-by: Christoph Lameter <cl@linux.com>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Tested-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/vmstat.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index 9bb314577911..0a1f7de972b3 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -1276,8 +1276,12 @@ static int __init setup_vmstat(void) register_cpu_notifier(&vmstat_notifier); - for_each_online_cpu(cpu) + get_online_cpus(); + for_each_online_cpu(cpu) { start_cpu_timer(cpu); + node_set_state(cpu_to_node(cpu), N_CPU); + } + put_online_cpus(); #endif #ifdef CONFIG_PROC_FS proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations); |