linux-kernel - Re: [PATCH v2] btrfs: simplify async csum synchronization

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Message-ID: <CAPjX3FftzNN1PZd+UbJU7WVCCX+J8hqktP20fwOFJ=OYx1-eMA@mail.gmail.com>
Date: Wed, 7 Jan 2026 18:00:37 +0100
From: Daniel Vacek <neelx@...e.com>
To: dsterba@...e.cz
Cc: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>, 
	Qu Wenruo <wqu@...e.com>, linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] btrfs: simplify async csum synchronization

On Mon, 24 Nov 2025 at 19:09, David Sterba <dsterba@...e.cz> wrote:
>
> On Tue, Nov 18, 2025 at 01:07:16PM +0100, David Sterba wrote:
> > On Thu, Nov 13, 2025 at 11:17:30AM +0100, Daniel Vacek wrote:
> > > We don't need the redundant completion csum_done which marks the
> > > csum work has been executed. We can simply flush_work() instead.
> > >
> > > This way we can slim down the btrfs_bio structure by 32 bytes matching
> > > it's size to what it used to be before introducing the async csums.
> > > Hence not making any change with respect to the structure size.
> > > ---
> > > This is a simple fixup for "btrfs: introduce btrfs_bio::async_csum" in
> > > for-next and can be squashed into it.
> > >
> > > v2: metadata is not checksummed here so use the endio_workers workqueue
> > >     unconditionally. Thanks to Qu Wenruo.
> >
> > This looks quite useful regarding the size reduction of btrfs_bio,
> > please fold it to the patch. Thanks.
>
> The 6.19 branch is now frozen so this patch will be applied separately
> later.

Gentle ping. It seems this one has not been picked yet.