[PATCH v12 7/9] cpuset: Expose cpus.effective and mems.effective on cgroup v2 root
From: Waiman Long <longman@redhat.com>
Date: 2018-08-27 14:42:12
Also in:
linux-doc, lkml
Subsystem:
control group (cgroup), control group - cpuset, documentation, the rest · Maintainers:
Tejun Heo, Johannes Weiner, Michal Koutný, Waiman Long, Jonathan Corbet, Linus Torvalds
Because of the fact that setting the "cpuset.sched.partition" in a direct child of root can remove CPUs from the root's effective CPU list, it makes sense to know what CPUs are left in the root cgroup for scheduling purpose. So the "cpuset.cpus.effective" control file is now exposed in the v2 cgroup root. For consistency, the "cpuset.mems.effective" control file is exposed as well. Signed-off-by: Waiman Long <longman@redhat.com> --- Documentation/admin-guide/cgroup-v2.rst | 4 ++-- kernel/cgroup/cpuset.c | 2 -- 2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 234fb18..655e54e 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst@@ -1613,7 +1613,7 @@ Cpuset Interface Files and won't be affected by any CPU hotplug events. cpuset.cpus.effective - A read-only multiple values file which exists on non-root + A read-only multiple values file which exists on all cpuset-enabled cgroups. It lists the onlined CPUs that are actually granted to this
@@ -1653,7 +1653,7 @@ Cpuset Interface Files and won't be affected by any memory nodes hotplug events. cpuset.mems.effective - A read-only multiple values file which exists on non-root + A read-only multiple values file which exists on all cpuset-enabled cgroups. It lists the onlined memory nodes that are actually granted to
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 286b851..0e41b62 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c@@ -2182,14 +2182,12 @@ static s64 cpuset_read_s64(struct cgroup_subsys_state *css, struct cftype *cft) .name = "cpus.effective", .seq_show = cpuset_common_seq_show, .private = FILE_EFFECTIVE_CPULIST, - .flags = CFTYPE_NOT_ON_ROOT, }, { .name = "mems.effective", .seq_show = cpuset_common_seq_show, .private = FILE_EFFECTIVE_MEMLIST, - .flags = CFTYPE_NOT_ON_ROOT, }, {
--
1.8.3.1