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Merge tag 'cgroup-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

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Pull cgroup updates from Tejun Heo:

 - Per-cpu cpu usage stats are now tracked

   This currently isn't printed out in the cgroupfs interface and can
   only be accessed through e.g. BPF. Should decide on a not-too-ugly
   way to show per-cpu stats in cgroupfs

 - cpuset received some cleanups and prepatory patches for the pending
   cpus.exclusive patchset which will allow cpuset partitions to be
   created below non-partition parents, which should ease the management
   of partition cpusets

 - A lot of code and documentation cleanup patches

 - tools/testing/selftests/cgroup/test_cpuset.c added

* tag 'cgroup-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: (32 commits)
  cgroup: Avoid -Wstringop-overflow warnings
  cgroup:namespace: Remove unused cgroup_namespaces_init()
  cgroup/rstat: Record the cumulative per-cpu time of cgroup and its descendants
  cgroup: clean up if condition in cgroup_pidlist_start()
  cgroup: fix obsolete function name in cgroup_destroy_locked()
  Documentation: cgroup-v2.rst: Correct number of stats entries
  cgroup: fix obsolete function name above css_free_rwork_fn()
  cgroup/cpuset: fix kernel-doc
  cgroup: clean up printk()
  cgroup: fix obsolete comment above cgroup_create()
  docs: cgroup-v1: fix typo
  docs: cgroup-v1: correct the term of Page Cache organization in inode
  cgroup/misc: Store atomic64_t reads to u64
  cgroup/misc: Change counters to be explicit 64bit types
  cgroup/misc: update struct members descriptions
  cgroup: remove cgrp->kn check in css_populate_dir()
  cgroup: fix obsolete function name
  cgroup: use cached local variable parent in for loop
  cgroup: remove obsolete comment above struct cgroupstats
  cgroup: put cgroup_tryget_css() inside CONFIG_CGROUP_SCHED
  ...
This commit is contained in:
Linus Torvalds
2023-09-01 15:58:21 -07:00
parent e987af4546 78d44b824e
commit 7716f383a5
19 changed files with 560 additions and 204 deletions
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14
include/linux/cgroup-defs.h
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@@ -341,6 +341,20 @@ struct cgroup_rstat_cpu {
*/
struct cgroup_base_stat last_bstat;
/*
* This field is used to record the cumulative per-cpu time of
* the cgroup and its descendants. Currently it can be read via
* eBPF/drgn etc, and we are still trying to determine how to
* expose it in the cgroupfs interface.
*/
struct cgroup_base_stat subtree_bstat;
/*
* Snapshots at the last reading. These are used to calculate the
* deltas to propagate to the per-cpu subtree_bstat.
*/
struct cgroup_base_stat last_subtree_bstat;
/*
* Child cgroups with stat updates on this cpu since the last read
* are linked on the parent's ->updated_children through