linux-kernel - Re: [PATCH] sched/fair: eliminate redundant code in sched

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Message-ID: <20190821112040.GA32150@iZj6chx1xj0e0buvshuecpZ>
Date:   Wed, 21 Aug 2019 19:20:40 +0800
From:   Peng Liu <iwtbavbm@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, mingo@...hat.com
Subject: Re: [PATCH] sched/fair: eliminate redundant code in sched_slice()

On Tue, Aug 20, 2019 at 03:50:55PM +0200, Peter Zijlstra wrote:
> On Fri, Aug 16, 2019 at 10:12:02PM +0800, Peng Liu wrote:
> > Since sched_slice() is used in high frequency,
> > small change should also make sense.
> 
> An actual Changelog would also make sense; but alas.

Thanks for your time!

About the changelog, I admit that it makes little improvement to the whole,
It is a so *short* function, I also don't think it can produce any visible
improvement through any kernel test tools. But as you can see, the redundant
intermediate operation indeed exists. There's no reason to let it exist any
more - make code clear and easy to understand if possible.

Best Regards,
Liu