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authorAndi Kleen <ak@linux.intel.com>2014-01-23 15:53:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 16:36:51 -0800
commit54a43d54988a3731d644fdeb7a1d6f46b4ac64c7 (patch)
tree87dc618d08b23d042e3ea01b3acbc56a0358cbdb /kernel/sysctl.c
parent5e270e254885893f8c82ab9b91caa648af3690df (diff)
downloadop-kernel-dev-54a43d54988a3731d644fdeb7a1d6f46b4ac64c7.zip
op-kernel-dev-54a43d54988a3731d644fdeb7a1d6f46b4ac64c7.tar.gz
numa: add a sysctl for numa_balancing
Add a working sysctl to enable/disable automatic numa memory balancing at runtime. This allows us to track down performance problems with this feature and is generally a good idea. This was possible earlier through debugfs, but only with special debugging options set. Also fix the boot message. [akpm@linux-foundation.org: s/sched_numa_balancing/sysctl_numa_balancing/] Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 332cefc..693eac3 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -389,6 +389,15 @@ static struct ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = proc_dointvec,
},
+ {
+ .procname = "numa_balancing",
+ .data = NULL, /* filled in by handler */
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_numa_balancing,
+ .extra1 = &zero,
+ .extra2 = &one,
+ },
#endif /* CONFIG_NUMA_BALANCING */
#endif /* CONFIG_SCHED_DEBUG */
{
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