linux-kernel - Re: [PATCH] sched/rt: Make update_curr

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Message-ID: <20180205103128.GR2295@hirez.programming.kicks-ass.net>
Date:   Mon, 5 Feb 2018 11:31:28 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Wen Yang <wen.yang99@....com.cn>
Cc:     mingo@...hat.com, linux-kernel@...r.kernel.org,
        jiang.biao2@....com.cn, zhong.weidong@....com.cn
Subject: Re: [PATCH] sched/rt: Make update_curr_rt() more accurate

On Mon, Feb 05, 2018 at 11:30:38AM +0100, Peter Zijlstra wrote:
> On Mon, Feb 05, 2018 at 11:18:41AM +0800, Wen Yang wrote:
> > rq->clock_task may be updated between the two calls of 
> > rq_clock_task() in update_curr_rt(). Calling rq_clock_task() only
> > once makes it more accurate and efficient, taking update_curr() as
> > reference.
> > 
> > Signed-off-by: Wen Yang <wen.yang99@....com.cn>
> > Reviewed-by: Jiang Biao <jiang.biao2@....com.cn>
> 
> Thanks!

I just noticed update_curr_dl() has the exact same issue, could you also
do a patch for that?