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Date:   Wed, 16 Dec 2020 10:48:01 +1100
From:   Dave Chinner <david@...morbit.com>
To:     Yang Shi <shy828301@...il.com>
Cc:     Roman Gushchin <guro@...com>, Kirill Tkhai <ktkhai@...tuozzo.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux MM <linux-mm@...ck.org>,
        Linux FS-devel Mailing List <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [v2 PATCH 6/9] mm: vmscan: use per memcg nr_deferred of shrinker

On Tue, Dec 15, 2020 at 02:27:18PM -0800, Yang Shi wrote:
> On Mon, Dec 14, 2020 at 6:46 PM Dave Chinner <david@...morbit.com> wrote:
> >
> > On Mon, Dec 14, 2020 at 02:37:19PM -0800, Yang Shi wrote:
> > > Use per memcg's nr_deferred for memcg aware shrinkers.  The shrinker's nr_deferred
> > > will be used in the following cases:
> > >     1. Non memcg aware shrinkers
> > >     2. !CONFIG_MEMCG
> > >     3. memcg is disabled by boot parameter
> > >
> > > Signed-off-by: Yang Shi <shy828301@...il.com>
> >
> > Lots of lines way over 80 columns.
> 
> I thought that has been lifted to 100 columns.

Documentation/process/coding-style.rst still says:

"The preferred limit on the length of a single line is 80 columns."

checkpatch might not warn about > 80 columns anymore, but if the
file you are modifying is almost entirely 80 columns in width, then
by default changes to that file should also stay within 80 columns.

I mostly consider using checkpatch to enforce coding styles to be
harmful....

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com

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