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| author | Valentin Schneider <valentin.schneider@arm.com> | 2021-05-10 18:10:23 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-05-18 13:53:53 +0300 |
| commit | 00b89fe0197f0c55a045775c11553c0cdb7082fe (patch) | |
| tree | 242f776a1460b80467564ed1156eeacc212dac27 /include/linux/kthread.h | |
| parent | fcb501704554eebfd27e3220b0540997fd2b24a8 (diff) | |
| download | linux-00b89fe0197f0c55a045775c11553c0cdb7082fe.tar.xz | |
sched: Make the idle task quack like a per-CPU kthread
For all intents and purposes, the idle task is a per-CPU kthread. It isn't
created via the same route as other pcpu kthreads however, and as a result
it is missing a few bells and whistles: it fails kthread_is_per_cpu() and
it doesn't have PF_NO_SETAFFINITY set.
Fix the former by giving the idle task a kthread struct along with the
KTHREAD_IS_PER_CPU flag. This requires some extra iffery as init_idle()
call be called more than once on the same idle task.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210510151024.2448573-2-valentin.schneider@arm.com
Diffstat (limited to 'include/linux/kthread.h')
| -rw-r--r-- | include/linux/kthread.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/kthread.h b/include/linux/kthread.h index 2484ed97e72f..d9133d6db308 100644 --- a/include/linux/kthread.h +++ b/include/linux/kthread.h @@ -33,6 +33,8 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data), unsigned int cpu, const char *namefmt); +void set_kthread_struct(struct task_struct *p); + void kthread_set_per_cpu(struct task_struct *k, int cpu); bool kthread_is_per_cpu(struct task_struct *k); |