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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-12-12 04:10:05 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-12-12 04:10:05 +0300 |
| commit | 085bec853afdbf3edf1b554defaac606a7e3f0c2 (patch) | |
| tree | 130711ffc0da2b519b564bbb7bd3aebdaed3a6e8 /Documentation | |
| parent | 72dd379e67fb6c4f4b0ed8ee36e9fed78227f352 (diff) | |
| parent | c2f31b79d510ec1a27138bdcf2d0ece1080be85e (diff) | |
| download | linux-085bec853afdbf3edf1b554defaac606a7e3f0c2.tar.xz | |
Merge branch 'for-4.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
- Prateek posted a couple patches to fix a deadlock involving cpuset
and workqueue. It unfortunately caused a different deadlock and the
recent workqueue hotplug simplification removed the original
deadlock, so Prateek's two patches are reverted for now.
- The new stat code was missing u64_stats initialization. Fixed.
- Doc and other misc changes
* 'for-4.15-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: add warning about RT not being supported on cgroup2
Revert "cgroup/cpuset: remove circular dependency deadlock"
Revert "cpuset: Make cpuset hotplug synchronous"
cgroup: properly init u64_stats
debug cgroup: use task_css_set instead of rcu_dereference
cpuset: Make cpuset hotplug synchronous
cgroup/cpuset: remove circular dependency deadlock
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/cgroup-v2.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt index 779211fbb69f..2cddab7efb20 100644 --- a/Documentation/cgroup-v2.txt +++ b/Documentation/cgroup-v2.txt @@ -898,6 +898,13 @@ controller implements weight and absolute bandwidth limit models for normal scheduling policy and absolute bandwidth allocation model for realtime scheduling policy. +WARNING: cgroup2 doesn't yet support control of realtime processes and +the cpu controller can only be enabled when all RT processes are in +the root cgroup. Be aware that system management software may already +have placed RT processes into nonroot cgroups during the system boot +process, and these processes may need to be moved to the root cgroup +before the cpu controller can be enabled. + CPU Interface Files ~~~~~~~~~~~~~~~~~~~ |