linux-kernel - Re: [PATCH] mm: Do not start/end writeback for pages stored in zswap

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Date: Tue, 11 Jun 2024 10:28:59 -0700
From: Yosry Ahmed <yosryahmed@...gle.com>
To: Shakeel Butt <shakeel.butt@...ux.dev>
Cc: Usama Arif <usamaarif642@...il.com>, akpm@...ux-foundation.org, willy@...radead.org, 
	hannes@...xchg.org, nphamcs@...il.com, chengming.zhou@...ux.dev, 
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH] mm: Do not start/end writeback for pages stored in zswap

On Tue, Jun 11, 2024 at 10:16 AM Shakeel Butt <shakeel.butt@...ux.dev> wrote:
>
> On Mon, Jun 10, 2024 at 03:30:37PM GMT, Usama Arif wrote:
> > start/end writeback combination incorrectly increments NR_WRITTEN
> > counter, eventhough the pages aren't written to disk. Pages successfully
> > stored in zswap should just unlock folio and return from writepage.
> >
> > Signed-off-by: Usama Arif <usamaarif642@...il.com>
>
> If Andrew has not picked this up, send a v2 with more detailed commit
> message, particularly why it is safe apply this change. You can use the
> explanation given by Yosry in response to my email. Also add text
> answering the other questions raised by Yosry.
>
> If Andrew has already picked it up, just request him to update the
> commit message.

Yes please, thanks Shakeel. I wanted to ask for this but got derailed :)

With the updated commit log feel free to add:
Acked-by: Yosry Ahmed <yosryahmed@...gle.com>

>
> You can add:
>
> Reviewed-by: Shakeel Butt <shakeel.butt@...ux.dev>
>