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docs, cgroup: add entries for pids to cgroup-v2.rst

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This patch add two entries (pids.peak and pids.events) for pids
controller, and also update pids.current because it's on non-root.

Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Xiu Jianfeng 2024-04-18 12:30:12 +00:00 committed by Tejun Heo
parent 15a0b5fe1a
commit c9169291be
1 changed files with 15 additions and 1 deletions
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Documentation/admin-guide/cgroup-v2.rst
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@ -2184,11 +2184,25 @@ PID Interface Files
Hard limit of number of processes.
pids.current
A read-only single value file which exists on all cgroups.
A read-only single value file which exists on non-root cgroups.
The number of processes currently in the cgroup and its
descendants.
pids.peak
A read-only single value file which exists on non-root cgroups.
The maximum value that the number of processes in the cgroup and its
descendants has ever reached.
pids.events
A read-only flat-keyed file which exists on non-root cgroups. The
following entries are defined. Unless specified otherwise, a value
change in this file generates a file modified event.
max
Number of times fork failed because limit was hit.
Organisational operations are not blocked by cgroup policies, so it is
possible to have pids.current > pids.max. This can be done by either
setting the limit to be smaller than pids.current, or attaching enough