From: Christoph Hellwig <hch@lst.de>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, Chris Mason <clm@fb.com>,
Josef Bacik <josef@toxicpanda.com>,
David Sterba <dsterba@suse.com>,
linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 2/5] iomap: add per-iomap_iter private data
Date: Thu, 5 May 2022 17:45:57 +0200 [thread overview]
Message-ID: <20220505154557.GA22763@lst.de> (raw)
In-Reply-To: <20220505154126.GB27155@magnolia>
On Thu, May 05, 2022 at 08:41:26AM -0700, Darrick J. Wong wrote:
> > + */
> > + iomi.private = iocb->private;
> > + WRITE_ONCE(iocb->private, NULL);
>
> Do we need to transfer it back after the bio completes? Or is it a
> feature that iocb->private changes to the bio?
No need to transfer it back. It ist just a creative way to pass private
data in. Initially I just added yet another argument to iomap_dio_rw,
and maybe I should just go back to that to make the things easier to
follow.
next prev parent reply other threads:[~2022-05-05 15:46 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 16:23 reduce memory allocation in the btrfs direct I/O path Christoph Hellwig
2022-05-04 16:23 ` [PATCH 1/5] iomap: allow the file system to provide a bio_set for direct I/O Christoph Hellwig
2022-05-05 15:38 ` Darrick J. Wong
2022-05-04 16:23 ` [PATCH 2/5] iomap: add per-iomap_iter private data Christoph Hellwig
2022-05-05 8:06 ` Nikolay Borisov
2022-05-05 15:06 ` Christoph Hellwig
2022-05-05 15:41 ` Darrick J. Wong
2022-05-05 15:45 ` Christoph Hellwig [this message]
2022-05-05 16:32 ` Darrick J. Wong
2022-05-05 18:15 ` Christoph Hellwig
2022-05-05 18:18 ` Darrick J. Wong
2022-05-04 16:23 ` [PATCH 3/5] btrfs: add a btrfs_dio_rw wrapper Christoph Hellwig
2022-05-04 16:23 ` [PATCH 4/5] btrfs: allocate dio_data on stack Christoph Hellwig
2022-05-04 16:23 ` [PATCH 5/5] btrfs: allocate the btrfs_dio_private as part of the iomap dio bio Christoph Hellwig
2022-05-05 8:12 ` Nikolay Borisov
2022-05-05 15:07 ` Christoph Hellwig
2022-05-05 15:20 ` David Sterba
2022-05-05 15:52 ` David Sterba
2022-05-05 8:33 ` reduce memory allocation in the btrfs direct I/O path Nikolay Borisov
2022-05-05 15:55 ` David Sterba
2022-05-06 17:18 ` Darrick J. Wong
2022-05-07 5:26 ` Christoph Hellwig
2022-05-09 18:46 ` David Sterba
2022-05-10 3:33 ` Darrick J. Wong
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