Messages in this thread Patch in this message | | | From | Waiman Long <> | Subject | [PATCH v9 5/7] cpuset: Expose cpus.effective and mems.effective on cgroup v2 root | Date | Tue, 29 May 2018 09:41:32 -0400 |
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Because of the fact that setting the "cpuset.sched.domain_root" 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/cgroup-v2.txt | 4 ++-- kernel/cgroup/cpuset.c | 2 -- 2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt index 681a809..b97f211 100644 --- a/Documentation/cgroup-v2.txt +++ b/Documentation/cgroup-v2.txt @@ -1474,7 +1474,7 @@ 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 allowed to be @@ -1504,7 +1504,7 @@ 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 allowed to diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 71cd920..f6ae483 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -2214,14 +2214,12 @@ 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
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