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cgroup fixes for v6.2-rc7

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During v6.2 cycle, there were a series of changes to task cpu affinity
 handling which fixed cpuset inadvertently clobbering user-configured
 affinity masks. Unfortunately, they broke the affinity handling on hybrid
 heterogeneous CPUs which have cores that can execute both 64 and 32bit along
 with cores that can only execute 32bit code.
 
 This late pull request contains two fix patches for the above issue. While
 reverting the changes that caused the regression is definitely an option,
 the origial patches do improve how cpuset behave signficantly in some cases
 and the fixes seem fairly safe, so I think it'd be better to try to fix them
 first.
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Merge tag 'cgroup-for-6.2-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:
 "During the v6.2 cycle, there were a series of changes to task cpu
  affinity handling which fixed cpuset inadvertently clobbering
  user-configured affinity masks. Unfortunately, they broke the affinity
  handling on hybrid heterogeneous CPUs which have cores that can
  execute both 64 and 32bit along with cores that can only execute 32bit
  code.

  This contains two fix patches for the above issue. While reverting the
  changes that caused the regression is definitely an option, the
  origial patches do improve how cpuset behave signficantly in some
  cases and the fixes seem fairly safe, so I think it'd be better to try
  to fix them first"

* tag 'cgroup-for-6.2-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cpuset: Call set_cpus_allowed_ptr() with appropriate mask for task
  cgroup/cpuset: Don't filter offline CPUs in cpuset_cpus_allowed() for top cpuset tasks
This commit is contained in:
Linus Torvalds 2023-02-06 14:07:38 -08:00
commit 05ecb68070
1 changed files with 36 additions and 9 deletions
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