linux-kernel - Re: [PATCH RFC] sched: introduce add_wait_queue_exclusive

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Message-ID: <20140319195520.GF8557@laptop.programming.kicks-ass.net>
Date:	Wed, 19 Mar 2014 20:55:20 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Dilger, Andreas" <andreas.dilger@...el.com>
Cc:	Oleg Nesterov <oleg@...hat.com>, Peng Tao <bergwolf@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>,
	"Drokin, Oleg" <oleg.drokin@...el.com>
Subject: Re: [PATCH RFC] sched: introduce add_wait_queue_exclusive_head

On Wed, Mar 19, 2014 at 07:44:29PM +0000, Dilger, Andreas wrote:
> The original reason for l_wait_event() not using TASK_UNINTERRUPTIBLE
> is to avoid the load on the server continually being "num_service_threads"
> regardless of whether they are actually doing something or not.  We
> added various cases for periodic wakeups and such afterward.

Hmm, maybe we should finally do the TASK_IDLE thing;

  https://lkml.org/lkml/2013/11/12/710

Oleg?
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