Commit 58cdb1ce authored Mar 08, 2016 by Tejun Heo

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>

parent 6cc578df

kernel/cgroup.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);