From: Hillf Danton <dhillf@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Mike Galbraith <efault@gmx.de>,
Yong Zhang <yong.zhang0@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] sched: update cpupri for runqueue when its priority changes
Date: Fri, 17 Jun 2011 20:59:59 +0800 [thread overview]
Message-ID: <BANLkTik8PpdwGgLOE7rAauXqGYdnT53GpQ@mail.gmail.com> (raw)
In-Reply-To: <1308275405.9218.156.camel@gandalf.stny.rr.com>
On Fri, Jun 17, 2011 at 9:50 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
> On Sun, 2011-06-05 at 17:54 +0800, Hillf Danton wrote:
>> When the priority of runqueue changes, lower or higer, the info of cpupri
>> should be updated, in cases such as pick_next_task_rt() and switched_to_rt().
>
> Why?
>
> We do the calculation on queuing and dequeuing the task, we only care
> about the highest priority task that is on the queue, not what is
> actually running.
>
It is to capture the changes in CPU priority caused by re-queued task and
throttled RQ.
Hillf
next prev parent reply other threads:[~2011-06-17 13:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-05 9:54 Hillf Danton
2011-06-17 1:50 ` Steven Rostedt
2011-06-17 12:59 ` Hillf Danton [this message]
2011-06-17 14:34 ` Steven Rostedt
2011-06-17 14:56 ` Steven Rostedt
2011-06-18 14:54 ` Hillf Danton
2011-06-18 17:11 ` Steven Rostedt
2011-06-19 8:33 ` Hillf Danton
2011-06-20 13:20 ` Steven Rostedt
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