linux-kernel - Re: [possible bug] missed wakeup in do

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Date:   Sat, 4 Sep 2021 11:21:17 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [possible bug] missed wakeup in do_sigtimedwait()?

On Sat, Sep 4, 2021 at 11:13 AM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> Thanks.  AFAICS, it's this logics in __schedule():
>                 if (signal_pending_state(prev_state, prev)) {
>                         WRITE_ONCE(prev->__state, TASK_RUNNING);

Exactly. As you note, it also handles the WAKEKILL case which is
basically equivalent (just for the "I can't take normal signals, but
I'm ok dying" case)

            Linus