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| author |   Christian Brauner <christian.brauner@ubuntu.com> | 2021-05-08 14:15:39 +0200 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2021-05-10 10:41:10 -0400 |
| commit | 340272b04036f2b833a7094eca5c15e5ed8e184c (patch) | |
| tree | 91166c7cf6b41f1945296f726880e8d5d552dd9d | |
| parent | cgroup: introduce cgroup.kill (diff) | |
| download | linux-dev-340272b04036f2b833a7094eca5c15e5ed8e184c.tar.xz linux-dev-340272b04036f2b833a7094eca5c15e5ed8e184c.zip | |
docs/cgroup: add entry for cgroup.kill
Give a brief overview of the cgroup.kill functionality.
Link: https://lore.kernel.org/r/20210503143922.3093755-2-brauner@kernel.org
Cc: Roman Gushchin <guro@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: cgroups@vger.kernel.org
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | Documentation/admin-guide/cgroup-v2.rst | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index b1e81aa8598a..91cd601a1454 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -952,6 +952,21 @@ All cgroup core files are prefixed with "cgroup." it's possible to delete a frozen (and empty) cgroup, as well as create new sub-cgroups. + cgroup.kill + A write-only single value file which exists in non-root cgroups. + The only allowed value is "1". + + Writing "1" to the file causes the cgroup and all descendant cgroups to + be killed. This means that all processes located in the affected cgroup + tree will be killed via SIGKILL. + + Killing a cgroup tree will deal with concurrent forks appropriately and + is protected against migrations. + + In a threaded cgroup, writing this file fails with EOPNOTSUPP as + killing cgroups is a process directed operation, i.e. it affects + the whole thread-group. + Controllers =========== |