linux-kernel - Re: [PATCH] ipvs: Remove unused variable ret from sync_thread

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Message-ID: <20131112162634.GB29065@redhat.com>
Date:	Tue, 12 Nov 2013 17:26:34 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	David Laight <David.Laight@...LAB.COM>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Ingo Molnar <mingo@...nel.org>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipvs: Remove unused variable ret from
	sync_thread_master()

On 11/12, Peter Zijlstra wrote:
>
> On Tue, Nov 12, 2013 at 02:21:39PM -0000, David Laight wrote:
> >
> >     /* Tell scheduler we are going to sleep... */
> >     if (signal_pending(current))
> >         /* We don't want waking immediately (again) */
> >         sleep_state = TASK_UNINTERRUPTIBLE;
> >     else
> >         sleep_state = TASK_INTERRUPTIBLE;
> >     set_current_state(sleep_state);
>
> If this is for kernel threads, I think you can wipe the pending state;

Yes, unless this kthread does allow_signal() signal_pending() can't be
true.

Oleg.

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