linux-kernel - Re: + include-linux-sched-mmh-uninline-mmdrop

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Date:   Fri, 15 Sep 2017 09:12:28 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     akpm@...ux-foundation.org, mingo@...nel.org, oleg@...hat.com,
        peterz@...radead.org, mm-commits@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: + include-linux-sched-mmh-uninline-mmdrop_async-etc.patch added
 to -mm tree

On Fri 15-09-17 09:07:31, Michal Hocko wrote:
> On Thu 14-09-17 13:19:38, Andrew Morton wrote:
> > From: Andrew Morton <akpm@...ux-foundation.org>
> > Subject: include/linux/sched/mm.h: uninline mmdrop_async(), etc
> > 
> > mmdrop_async() is only used in fork.c.  Move that and its support
> > functions into fork.c, uninline it all.
> 
> Is this really an improvement? Why do we want to discourage more code
> paths to use mmdrop_async? It sounds like a useful api and it has been
> removed only because it lost its own user in oom code. Now that we have
> a user I would just keep it where it was before.

Dohh, I have mixed mmput_async with mmdrop_async. Anyway I still think
that this is universal enough to have it in a header rather than hiding
it in fork.c
-- 
Michal Hocko
SUSE Labs