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authorTejun Heo <tj@kernel.org>2017-07-17 04:43:33 +0300
committerTejun Heo <tj@kernel.org>2017-07-17 04:44:42 +0300
commit788b950c62e06b02278a0fd380e1a0667996ce3c (patch)
treeca94c0d11e8d7f0b736d27036dd611f6ea2e75a7 /include/linux/cgroup.h
parent88e033e326307831922e34e7de0d694274dcc1c7 (diff)
downloadlinux-788b950c62e06b02278a0fd380e1a0667996ce3c.tar.xz
cgroup: distinguish local and children populated states
cgrp->populated_cnt counts both local (the cgroup's populated css_sets) and subtree proper (populated children) so that it's only zero when the whole subtree, including self, is empty. This patch splits the counter into two so that local and children populated states are tracked separately. It allows finer-grained tests on the state of the hierarchy which will be used to replace css_set walking local populated test. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/cgroup.h')
-rw-r--r--include/linux/cgroup.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 710a005c6b7a..308b10797a54 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -537,7 +537,7 @@ static inline bool task_under_cgroup_hierarchy(struct task_struct *task,
/* no synchronization, the result can only be used as a hint */
static inline bool cgroup_is_populated(struct cgroup *cgrp)
{
- return cgrp->populated_cnt;
+ return cgrp->nr_populated_csets + cgrp->nr_populated_children;
}
/* returns ino associated with a cgroup */