linux-kernel - Re: [PATCH] sched: swait: use wake_up_process() instead of wake_up

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Message-ID: <20210317094618.GA1724119@gmail.com>
Date:   Wed, 17 Mar 2021 10:46:18 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     Mike Galbraith <efault@....de>
Cc:     Wang Qing <wangqing@...o.com>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched: swait: use wake_up_process() instead of
 wake_up_state()


* Mike Galbraith <efault@....de> wrote:

> On Tue, 2021-03-16 at 19:20 +0800, Wang Qing wrote:
> > Why not just use wake_up_process().
> 
> IMO this is not an improvement.  There are other places where explicit
> TASK_NORMAL is used as well, and they're all perfectly clear as is.

Arguably those could all be converted to wake_up_process() as well. 
It's a very small kernel code size optimization. There's about 3 such 
places, could be converted in a single patch.

Thanks,

	Ingo