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cgroup: fix incorrect destination cgroup in cgroup_update_dfl_csses() 

cgroup_update_dfl_csses() should move each task in the subtree to
self; however, it was incorrectly calling cgroup_migrate_add_src()
with the root of the subtree as @dst_cgrp.  Fortunately,
cgroup_migrate_add_src() currently uses @dst_cgrp only to determine
the hierarchy and the bug doesn't cause any actual breakages.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2016-03-08 11:51:25 -05:00
parent 6cc578df40
commit 58cdb1ceb1
1 changed files with 1 additions and 1 deletions
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2
kernel/cgroup.c
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@ -2901,7 +2901,7 @@ static int cgroup_update_dfl_csses(struct cgroup *cgrp)
struct cgrp_cset_link *link;
list_for_each_entry(link, &dsct->cset_links, cset_link)
cgroup_migrate_add_src(link->cset, cgrp,
cgroup_migrate_add_src(link->cset, dsct,
&preloaded_csets);
}
spin_unlock_bh(&css_set_lock);