linux-kernel - Re: [PATCH 1/2] sched: Move __task_rq_{, un}lock() to kernel/sched/sched.h

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Message-ID: <1424172011.5749.26.camel@tkhai>
Date:	Tue, 17 Feb 2015 14:20:11 +0300
From:	Kirill Tkhai <ktkhai@...allels.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	<linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...hat.com>,
	"Josh Poimboeuf" <jpoimboe@...hat.com>
Subject: Re: [PATCH 1/2] sched: Move __task_rq_{, un}lock() to
 kernel/sched/sched.h

В Вт, 17/02/2015 в 12:11 +0100, Peter Zijlstra пишет:
> On Tue, Feb 17, 2015 at 01:46:51PM +0300, Kirill Tkhai wrote:
> > 
> > Place it in sched.h, because dl_task_timer() needs it.
> > Also remove lockdep check, which is not fit to this
> > function.
> 
> No, that lockdep check is valid for all current sites.

Sure, but dl_task_timer() do not lock pi_lock. I wanted to delete
"again:" loop in it to simplify second patch.

We can do not touch __task_rq_lock(), and add smp_rmb() in "again:"
loop in second patch instead of this.


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