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Date: Wed, 16 Jul 2008 11:43:05 +0800 From: Lai Jiangshan <laijs@...fujitsu.com> To: Andrew Morton <akpm@...ux-foundation.org> CC: Paul Jackson <pj@....com>, Paul Menage <menage@...gle.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [PATCH 1/3] cpuset: Don't pass empty cpumasks to partition_sched_domains() i create a lots of empty cpusets(empty cpumasks) and turn off the "sched_load_balance" in top cpuset. And 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@...fujitsu.com> --- diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 798b3ab..1fbd52c 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -609,8 +609,13 @@ static void rebuild_sched_domains(void) while (__kfifo_get(q, (void *)&cp, sizeof(cp))) { struct cgroup *cont; struct cpuset *child; /* scans child cpusets of cp */ + + if (cpus_empty(cp->cpus_allowed)) + continue; + if (is_sched_load_balance(cp)) csa[csn++] = cp; + list_for_each_entry(cont, &cp->css.cgroup->children, sibling) { child = cgroup_cs(cont); __kfifo_put(q, (void *)&child, sizeof(cp)); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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