From: Oleg Nesterov <oleg@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: "Dilger, Andreas" <andreas.dilger@intel.com>,
Peng Tao <bergwolf@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>,
"Drokin, Oleg" <oleg.drokin@intel.com>
Subject: Re: [PATCH RFC] sched: introduce add_wait_queue_exclusive_head
Date: Thu, 20 Mar 2014 19:49:04 +0100 [thread overview]
Message-ID: <20140320184904.GA10194@redhat.com> (raw)
In-Reply-To: <20140319195520.GF8557@laptop.programming.kicks-ass.net>
On 03/19, Peter Zijlstra wrote:
>
> 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
Agreed. And if we are not going to expose TASK_IDLE bit in /proc/ (I think
we should not) the patch should be really trivial.
Oleg.
next prev parent reply other threads:[~2014-03-20 18:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-18 13:10 [PATCH RFC] sched: introduce add_wait_queue_exclusive_head Peng Tao
2014-03-18 13:33 ` Peter Zijlstra
2014-03-18 13:51 ` Peng Tao
2014-03-18 14:05 ` Peter Zijlstra
2014-03-18 14:44 ` Peng Tao
2014-03-18 16:23 ` Oleg Nesterov
2014-03-19 2:22 ` Peng Tao
2014-03-19 17:33 ` Oleg Nesterov
2014-03-19 19:44 ` Dilger, Andreas
2014-03-19 19:55 ` Peter Zijlstra
2014-03-20 7:06 ` Dilger, Andreas
2014-03-20 18:49 ` Oleg Nesterov [this message]
2014-03-18 15:47 ` Oleg Nesterov
2014-03-19 2:17 ` Peng Tao
[not found] ` <20140319164907.GA10113@redhat.com>
2014-03-19 16:57 ` Peter Zijlstra
2014-03-19 17:19 ` Oleg Nesterov
2014-03-20 17:51 ` [PATCH 0/2] wait: introduce WQ_FLAG_EXCLUSIVE_HEAD Oleg Nesterov
2014-03-20 17:51 ` [PATCH 1/2] wait: turn "bool exclusive" arg of __wait_event() into wflags Oleg Nesterov
2014-03-20 17:51 ` [PATCH 2/2] wait: introduce WQ_FLAG_EXCLUSIVE_HEAD Oleg Nesterov
2014-03-21 2:45 ` [PATCH 0/2] " Dilger, Andreas
2014-03-21 18:49 ` Oleg Nesterov
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