linux-kernel - Re: [PATCH next] mm/vmscan: __isolate_lru_page

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Date:   Wed, 25 Nov 2020 15:43:46 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>,
        Matthew Wilcox <willy@...radead.org>,
        Hugh Dickins <hughd@...gle.com>, Yu Zhao <yuzhao@...gle.com>,
        Michal Hocko <mhocko@...e.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH next] mm/vmscan: __isolate_lru_page_prepare clean up

On Tue, 24 Nov 2020 12:21:28 +0100 Vlastimil Babka <vbabka@...e.cz> wrote:

> On 11/22/20 3:00 PM, Alex Shi wrote:
> > Thanks a lot for all comments, I picked all up and here is the v3:
> > 
> >  From 167131dd106a96fd08af725df850e0da6ec899af Mon Sep 17 00:00:00 2001
> > From: Alex Shi <alex.shi@...ux.alibaba.com>
> > Date: Fri, 20 Nov 2020 14:49:16 +0800
> > Subject: [PATCH v3 next] mm/vmscan: __isolate_lru_page_prepare clean up
> > 
> > The function just return 2 results, so use a 'switch' to deal with its
> > result is unnecessary, and simplify it to a bool func as Vlastimil
> > suggested.
> > 
> > Also remove 'goto' by reusing list_move(), and take Matthew Wilcox's
> > suggestion to update comments in function.
> 
> I wouldn't mind if the goto stayed, but it's not repeating that much 
> without it (list_move() + continue, 3 times) so...

I tried that, and .text became significantly larger, for reasons which
I didn't investigate ;)