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From: Hillf Danton <dhillf@gmail.com>
To: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Michael Wang <wangyun@linux.vnet.ibm.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [Question] sched: Should nr_uninterruptible be decremented in ttwu_do_activate()?
Date: Mon, 16 Jan 2012 21:00:02 +0800	[thread overview]
Message-ID: <CAJd=RBCp+Pdkip7O+xRhGFU2kpFyJQmxeXR5dJu7xmQ2uNrW9Q@mail.gmail.com> (raw)
In-Reply-To: <CADZ9YHiNWddjLBGnvDO==Jpz9nQtPREmkFOX0P5ELOK2neW1=g@mail.gmail.com>

On Mon, Jan 16, 2012 at 4:27 PM, Rakib Mullick <rakib.mullick@gmail.com> wrote:
> On Mon, Jan 16, 2012 at 1:53 PM, Michael Wang
> <wangyun@linux.vnet.ibm.com> wrote:
>> I think the task in rq->wake_list should already have state:TASK_WAKING,
>> because it's a wake list.
>>
> But, what I got by means of TASK_WAKING is this task is about to RUN,
> very soon it'll have TASK_RUNNING state. And, if I hadn't miss any
> portion of code, then rq->wake_list doesn't have TASK_WAKING state.
>
Hi Rakib

The question maybe settled down by adding a BUG_ON or similar to
capture what you concern, and wait results while drinking tea or
coffee.

Best regards
Hillf

  parent reply	other threads:[~2012-01-16 13:00 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-11 17:22 [Question] sched: Should nr_uninterruptible be decremented in ttwu_do_activate()? Rakib Mullick
2012-01-11 17:29 ` Peter Zijlstra
2012-01-12  6:09   ` Rakib Mullick
2012-01-12  7:25     ` Peter Zijlstra
2012-01-12 17:08       ` Rakib Mullick
2012-01-12 20:25         ` Peter Zijlstra
2012-01-16  7:53         ` Michael Wang
2012-01-16  8:27           ` Rakib Mullick
2012-01-16  9:22             ` Michael Wang
2012-01-16 17:22               ` Rakib Mullick
2012-01-16 13:00             ` Hillf Danton [this message]
2012-01-16 17:26               ` Rakib Mullick

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