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cpuset: fix wrong calculation of relax domain level

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When multiple cpusets are overlapping in their 'cpus' and hence they
form a single sched domain, the largest sched_relax_domain_level among
those should be used. But when top_cpuset's sched_load_balance is
set, its sched_relax_domain_level is used regardless other sub-cpusets'.

This patch fixes it by walking the cpuset hierarchy to find the largest
sched_relax_domain_level.

Signed-off-by: Lai Jiangshan <[email protected]>
Signed-off-by: Li Zefan <[email protected]>
Cc: Paul Menage <[email protected]>
Cc: Cedric Le Goater <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: KAMEZAWA Hiroyuki <[email protected]>
Reviewed-by: Paul Jackson <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Li Zefan 2008-07-29 22:33:23 -07:00 • committed by Linus Torvalds
commit 93a6557558
1 changed files with 1 additions and 1 deletions
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2
kernel/cpuset.c
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@ -616,7 +616,7 @@ void rebuild_sched_domains(void)
dattr = kmalloc(sizeof(struct sched_domain_attr), GFP_KERNEL);
if (dattr) {
*dattr = SD_ATTR_INIT;
update_domain_attr(dattr, &top_cpuset);
update_domain_attr_tree(dattr, &top_cpuset);
}
*doms = top_cpuset.cpus_allowed;
goto rebuild;