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authorLi Zefan <lizefan@huawei.com>2013-06-09 13:16:29 +0400
committerTejun Heo <tj@kernel.org>2013-06-13 21:48:32 +0400
commit5c5cc62321d9df7a9a608346fc649c4528380c8f (patch)
treee7e04867979f4f6920d6d1244057112ceb235390 /include/linux/cgroup.h
parent070b57fcacc9dfc23a180290079078373fb697e1 (diff)
downloadlinux-5c5cc62321d9df7a9a608346fc649c4528380c8f.tar.xz
cpuset: allow to keep tasks in empty cpusets
To achieve this: - We call update_tasks_cpumask/nodemask() for empty cpusets when hotplug happens, instead of moving tasks out of them. - When a cpuset's masks are changed by writing cpuset.cpus/mems, we also update tasks in child cpusets which are empty. v3: - do propagation work in one place for both hotplug and unplug v2: - drop rcu_read_lock before calling update_task_nodemask() and update_task_cpumask(), instead of using workqueue. - add documentation in include/linux/cgroup.h Signed-off-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/cgroup.h')
-rw-r--r--include/linux/cgroup.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index d0ad3794b947..53e81a61be57 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -277,6 +277,10 @@ enum {
*
* - Remount is disallowed.
*
+ * - cpuset: tasks will be kept in empty cpusets when hotplug happens
+ * and take masks of ancestors with non-empty cpus/mems, instead of
+ * being moved to an ancestor.
+ *
* - memcg: use_hierarchy is on by default and the cgroup file for
* the flag is not created.
*