linux-kernel - Re: [PATCH] mm, THP, swap: fix allocating cluster for swapfile by mistake

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Message-ID: <20200819205405.GB26216@xiangao.remote.csb>
Date:   Thu, 20 Aug 2020 04:54:05 +0800
From:   Gao Xiang <hsiangkao@...hat.com>
To:     Rafael Aquini <aquini@...hat.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Carlos Maiolino <cmaiolino@...hat.com>,
        Eric Sandeen <esandeen@...hat.com>,
        "Huang, Ying" <ying.huang@...el.com>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH] mm, THP, swap: fix allocating cluster for swapfile by
 mistake

Hi Rafael,

On Wed, Aug 19, 2020 at 04:44:05PM -0400, Rafael Aquini wrote:
> On Wed, Aug 19, 2020 at 01:05:06PM -0700, Andrew Morton wrote:
> > On Thu, 20 Aug 2020 03:56:13 +0800 Gao Xiang <hsiangkao@...hat.com> wrote:
> > 
> > > SWP_FS doesn't mean the device is file-backed swap device,
> > > which just means each writeback request should go through fs
> > > by DIO. Or it'll just use extents added by .swap_activate(),
> > > but it also works as file-backed swap device.
> > 
> > This is very hard to understand :(
> > 
> 
> I'll work with Gao to rephrase that message. Sorry!

Sorry about that :( I just finished the test and went through
the related swap code and finally saw this so I think it wouldn't
work entirely for the current swap code... and Sorry about
my limited English.

Kindly feel free to repost the patch with rephrased commit
message. Anyway, I've done this task :)

Thanks,
Gao Xiang