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kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing

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[ Upstream commit 15b2219facadec583c24523eed40fa45865f859f ]

Don't send fake signals to PF_IO_WORKER threads, they don't accept
signals. Just treat them like kthreads in this regard, all they need
is a wakeup as no forced kernel/user transition is needed.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jens Axboe 2021-03-12 20:20:42 -07:00 committed by Greg Kroah-Hartman
parent 540a1ebf3c
commit 7f6518ec6e
1 changed files with 1 additions and 1 deletions
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kernel/freezer.c
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@ -134,7 +134,7 @@ bool freeze_task(struct task_struct *p)
return false;
}
if (!(p->flags & PF_KTHREAD))
if (!(p->flags & (PF_KTHREAD | PF_IO_WORKER)))
fake_signal_wake_up(p);
else
wake_up_state(p, TASK_INTERRUPTIBLE);