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From: Ingo Molnar <mingo@elte.hu>
To: Michael Buesch <mbuesch@freenet.de>
Cc: linux-kernel@vger.kernel.org, ck@vds.kolivas.org, kernel@kolivas.org
Subject: Re: [PATCH, RFC] protect call to set_tsk_need_resched() by the rq-lock
Date: Tue, 7 Dec 2004 14:10:06 +0100	[thread overview]
Message-ID: <20041207131006.GB3710@elte.hu> (raw)
In-Reply-To: <200412062339.52695.mbuesch@freenet.de>


* Michael Buesch <mbuesch@freenet.de> wrote:

> The two attached patches (one against vanilla kernel and one against
> ck patchset) moves the rq-lock a few lines up in scheduler_tick() to
> also protect set_tsk_need_resched().
> 
> Is that neccessary?

scheduler_tick() is a special case, 'current' is pinned and cannot go
away, nor can it get off the runqueue. So the patch is not needed.

	Ingo

  reply	other threads:[~2004-12-07 13:11 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-12-06 22:39 Michael Buesch
2004-12-07 13:10 ` Ingo Molnar [this message]
2004-12-07 23:30   ` Michael Buesch
2004-12-08  8:26     ` Ingo Molnar
2004-12-08  9:49       ` Michael Buesch
2004-12-08 10:29         ` Michael Buesch
2004-12-08 11:15         ` Ingo Molnar

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