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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2025-05-12 17:58:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2025-05-12 17:58:57 -0700 |
| commit | d471045e757e941ca802bca3147aab45bf770754 (patch) | |
| tree | a309e15f5cda44ee7066e17c68050b400016d4e7 | |
| parent | Merge tag 'platform-drivers-x86-v6.15-5' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 (diff) | |
| parent | cgroup/cpuset: Extend kthread_is_per_cpu() check to all PF_NO_SETAFFINITY tasks (diff) | |
| download | wireguard-linux-d471045e757e941ca802bca3147aab45bf770754.tar.xz wireguard-linux-d471045e757e941ca802bca3147aab45bf770754.zip | |
Merge tag 'cgroup-for-6.15-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo:
"One low-risk patch to fix a cpuset bug where it over-eagerly tries to
modify CPU affinity of kernel threads"
* tag 'cgroup-for-6.15-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup/cpuset: Extend kthread_is_per_cpu() check to all PF_NO_SETAFFINITY tasks
| -rw-r--r-- | kernel/cgroup/cpuset.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 306b60430091..24b70ea3e6ce 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1116,9 +1116,11 @@ void cpuset_update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus) if (top_cs) { /* - * Percpu kthreads in top_cpuset are ignored + * PF_NO_SETAFFINITY tasks are ignored. + * All per cpu kthreads should have PF_NO_SETAFFINITY + * flag set, see kthread_set_per_cpu(). */ - if (kthread_is_per_cpu(task)) + if (task->flags & PF_NO_SETAFFINITY) continue; cpumask_andnot(new_cpus, possible_mask, subpartitions_cpus); } else { |