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cpuset: Minor cgroup2 interface updates 

* Rename the partition file from "cpuset.sched.partition" to
  "cpuset.cpus.partition".

* When writing to the partition file, drop "0" and "1" and only accept
  "member" and "root".

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Waiman Long <longman@redhat.com>
This commit is contained in:
Tejun Heo 2018-11-13 12:03:33 -08:00
parent 5cf8114d6e
commit b1e3aeb11c
2 changed files with 7 additions and 7 deletions
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6
Documentation/admin-guide/cgroup-v2.rst
View File

@ -1708,15 +1708,15 @@ Cpuset Interface Files
Its value will be affected by memory nodes hotplug events. Its value will be affected by memory nodes hotplug events.
cpuset.sched.partition cpuset.cpus.partition
A read-write single value file which exists on non-root A read-write single value file which exists on non-root
cpuset-enabled cgroups. This flag is owned by the parent cgroup cpuset-enabled cgroups. This flag is owned by the parent cgroup
and is not delegatable. and is not delegatable.
It accepts only the following input values when written to. It accepts only the following input values when written to.
"root" or "1" - a paritition root "root" - a paritition root
"member" or "0" - a non-root member of a partition "member" - a non-root member of a partition
When set to be a partition root, the current cgroup is the When set to be a partition root, the current cgroup is the
root of a new partition or scheduling domain that comprises root of a new partition or scheduling domain that comprises

8
kernel/cgroup/cpuset.c
View File

@ -2468,11 +2468,11 @@ static ssize_t sched_partition_write(struct kernfs_open_file *of, char *buf,
buf = strstrip(buf); buf = strstrip(buf);
/* /*
* Convert "root"/"1" to 1, and convert "member"/"0" to 0. * Convert "root" to ENABLED, and convert "member" to DISABLED.
*/ */
if (!strcmp(buf, "root") || !strcmp(buf, "1")) if (!strcmp(buf, "root"))
val = PRS_ENABLED; val = PRS_ENABLED;
else if (!strcmp(buf, "member") || !strcmp(buf, "0")) else if (!strcmp(buf, "member"))
val = PRS_DISABLED; val = PRS_DISABLED;
else else
return -EINVAL; return -EINVAL;
@ -2631,7 +2631,7 @@ static struct cftype dfl_files[] = {
}, },
{ {
.name = "sched.partition", .name = "cpus.partition",
.seq_show = sched_partition_show, .seq_show = sched_partition_show,
.write = sched_partition_write, .write = sched_partition_write,
.private = FILE_PARTITION_ROOT, .private = FILE_PARTITION_ROOT,