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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com,
	ebiederm@xmission.com, "Toke Høiland-Jørgensen" <toke@redhat.com>,
	"Kalle Valo" <kvalo@kernel.org>,
	"Johannes Berg" <johannes@sipsolutions.net>
Subject: Re: [PATCH] signal: break out of wait loops on kthread_stop()
Date: Mon, 27 Jun 2022 16:54:54 +0200	[thread overview]
Message-ID: <YrnEvjcG8tmF3dRV@zx2c4.com> (raw)
In-Reply-To: <YrmwJyueoz1Z4ti0@hirez.programming.kicks-ass.net>

On Mon, Jun 27, 2022 at 03:27:03PM +0200, Peter Zijlstra wrote:
> On Mon, Jun 27, 2022 at 02:00:20PM +0200, Jason A. Donenfeld wrote:
> 
> > +bool __kthread_should_stop(struct task_struct *k)
> > +{
> > +	return (k->flags & PF_KTHREAD) &&
> > +	       test_bit(KTHREAD_SHOULD_STOP, &to_kthread(k)->flags);
> > +}
> 
> This used to be a racy pattern; not sure it still is since Eric poked at
> this last, but please use __to_kthread() instead.

Ah, indeed. Will send a v2.

Jason

  reply	other threads:[~2022-06-27 14:55 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-27 12:00 [PATCH] signal: break out of wait loops on kthread_stop() Jason A. Donenfeld
2022-06-27 13:27 ` Peter Zijlstra
2022-06-27 14:54   ` Jason A. Donenfeld [this message]
2022-06-27 14:57     ` [PATCH v2] " Jason A. Donenfeld
2022-06-27 19:16       ` Eric W. Biederman
2022-06-28 15:59         ` Jason A. Donenfeld
2022-06-28 16:14           ` [PATCH v3] " Jason A. Donenfeld
2022-07-04 12:22             ` Jason A. Donenfeld
2022-07-11 17:53               ` Jason A. Donenfeld
2022-07-11 18:57                 ` Eric W. Biederman
2022-07-11 20:18                   ` Jason A. Donenfeld
2022-07-11 20:21                     ` [PATCH v4] " Jason A. Donenfeld
2022-07-11 22:05                       ` Eric W. Biederman
2022-07-11 23:21                         ` [PATCH v5] " Jason A. Donenfeld
2022-07-12  0:00                           ` Eric W. Biederman
2022-07-12  0:18                             ` Jason A. Donenfeld
2022-07-11 22:04                     ` [PATCH v3] " Eric W. Biederman

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