linux-kernel - Re: Re:[PATCH]sched/rt: Do not try to push tasks if pinned task switches to RT

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Date:	Tue, 29 Jan 2013 08:19:05 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Kirill Tkhai <tkhai@...dex.ru>
Cc:	Libo Chen <chenlibo.3@...il.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	lizefan@...wei.com, jovi.zhangwei@...wei.com
Subject: Re: Re:[PATCH]sched/rt: Do not try to push tasks if pinned task
 switches to RT

On Tue, 2013-01-29 at 13:13 +0400, Kirill Tkhai wrote:

> > 
> > The task of p->nr_cpus_allowed =1 would`t be added to pushable_tasks list （see the enqueue_task_rt()）and this push_rt_task() need to push other tasks when rt.overloaded.
> 
> If rq has already had 2 or more pushable tasks and we try to add a pinned task then call of push_rt_task will just waste a time.
> 

Correct, I just have some minor comments about the patch.

-- Steve


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