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

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Message-ID: <20260108143529.GF21071@suse.cz>
Date: Thu, 8 Jan 2026 15:35:29 +0100
From: David Sterba <dsterba@...e.cz>
To: Daniel Vacek <neelx@...e.com>
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 Wed, Jan 07, 2026 at 06:00:37PM +0100, Daniel Vacek wrote:
> 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.

Now added to for-next, thanks.