diff options
author | Lai Jiangshan <laijs@cn.fujitsu.com> | 2008-07-25 04:47:23 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 13:53:38 -0400 |
commit | 489a5393a20dcbf91104052120eb2eff8791b61b (patch) | |
tree | 63ed72ce1a7a5e4c5d361e8d1c7a876183d8bbf9 /kernel | |
parent | c372e817afc629fea9ff6321313325ed0b4a855b (diff) |
cpuset: don't pass empty cpumasks to partition_sched_domains()
I create lots of empty cpusets(empty cpumasks) and turn off the
"sched_load_balance" in top cpuset.
I found that all these empty cpumasks are passed to
partition_sched_domains() in rebuild_sched_domains(), it's very
time-consuming for partition_sched_domains() and it's not need.
It also reduce memory consumed and some works in rebuild_sched_domains()
too.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/cpuset.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 60d2c4702c6c..531b235e546f 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c | |||
@@ -610,8 +610,13 @@ void rebuild_sched_domains(void) | |||
610 | while (__kfifo_get(q, (void *)&cp, sizeof(cp))) { | 610 | while (__kfifo_get(q, (void *)&cp, sizeof(cp))) { |
611 | struct cgroup *cont; | 611 | struct cgroup *cont; |
612 | struct cpuset *child; /* scans child cpusets of cp */ | 612 | struct cpuset *child; /* scans child cpusets of cp */ |
613 | |||
614 | if (cpus_empty(cp->cpus_allowed)) | ||
615 | continue; | ||
616 | |||
613 | if (is_sched_load_balance(cp)) | 617 | if (is_sched_load_balance(cp)) |
614 | csa[csn++] = cp; | 618 | csa[csn++] = cp; |
619 | |||
615 | list_for_each_entry(cont, &cp->css.cgroup->children, sibling) { | 620 | list_for_each_entry(cont, &cp->css.cgroup->children, sibling) { |
616 | child = cgroup_cs(cont); | 621 | child = cgroup_cs(cont); |
617 | __kfifo_put(q, (void *)&child, sizeof(cp)); | 622 | __kfifo_put(q, (void *)&child, sizeof(cp)); |