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cgroup: Fix documentation for cpu.idle

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Two problems:
	- cpu.idle cgroups show up with 0 weight, correct the
	  documentation to indicate this.
	- cpu.idle has no entry describing it.

Signed-off-by: Josh Don <joshdon@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Josh Don 2023-11-30 16:52:03 -08:00 committed by Tejun Heo
parent 877c737db9
commit 7b91eb6000
1 changed files with 15 additions and 1 deletions
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16
Documentation/admin-guide/cgroup-v2.rst
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@ -1093,7 +1093,11 @@ All time durations are in microseconds.
A read-write single value file which exists on non-root
cgroups. The default is "100".
The weight in the range [1, 10000].
For non idle groups (cpu.idle = 0), the weight is in the
range [1, 10000].
If the cgroup has been configured to be SCHED_IDLE (cpu.idle = 1),
then the weight will show as a 0.
cpu.weight.nice
A read-write single value file which exists on non-root
@ -1157,6 +1161,16 @@ All time durations are in microseconds.
values similar to the sched_setattr(2). This maximum utilization
value is used to clamp the task specific maximum utilization clamp.
cpu.idle
A read-write single value file which exists on non-root cgroups.
The default is 0.
This is the cgroup analog of the per-task SCHED_IDLE sched policy.
Setting this value to a 1 will make the scheduling policy of the
cgroup SCHED_IDLE. The threads inside the cgroup will retain their
own relative priorities, but the cgroup itself will be treated as
very low priority relative to its peers.
Memory