From: Keith Busch <kbusch@kernel.org>
To: Kanchan Joshi <joshi.k@samsung.com>
Cc: josef@toxicpanda.com, dsterba@suse.com, clm@fb.com,
axboe@kernel.dk, hch@lst.de, linux-btrfs@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-block@vger.kernel.org,
gost.dev@samsung.com
Subject: Re: [RFC 0/3] Btrfs checksum offload
Date: Wed, 29 Jan 2025 08:28:24 -0700 [thread overview]
Message-ID: <Z5pJGHAR7AWCC0T4@kbusch-mbp> (raw)
In-Reply-To: <20250129140207.22718-1-joshi.k@samsung.com>
On Wed, Jan 29, 2025 at 07:32:04PM +0530, Kanchan Joshi wrote:
> There is value in avoiding Copy-on-write (COW) checksum tree on
> a device that can anyway store checksums inline (as part of PI).
> This would eliminate extra checksum writes/reads, making I/O
> more CPU-efficient.
Another potential benefit: if the device does the checksum, then I think
btrfs could avoid the stable page writeback overhead and let the
contents be changable all the way until it goes out on the wire.
Though I feel the very specific device format constraints that can
support an offload like this are a unfortunate.
next prev parent reply other threads:[~2025-01-29 15:28 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20250129141039epcas5p11feb1be4124c0db3c5223325924183a3@epcas5p1.samsung.com>
2025-01-29 14:02 ` [RFC 0/3] Btrfs checksum offload Kanchan Joshi
2025-01-29 14:02 ` [RFC 1/3] block: add integrity offload Kanchan Joshi
2025-01-29 14:02 ` [RFC 2/3] nvme: support " Kanchan Joshi
2025-01-29 14:02 ` [RFC 3/3] btrfs: add checksum offload Kanchan Joshi
2025-01-29 21:27 ` Qu Wenruo
2025-01-29 14:55 ` [RFC 0/3] Btrfs " Johannes Thumshirn
2025-01-31 10:19 ` Kanchan Joshi
2025-01-31 10:29 ` Johannes Thumshirn
2025-02-03 13:25 ` Kanchan Joshi
2025-02-03 13:40 ` Johannes Thumshirn
2025-02-03 14:03 ` Kanchan Joshi
2025-02-03 14:41 ` Johannes Thumshirn
2025-01-29 15:28 ` Keith Busch [this message]
2025-01-29 15:40 ` Christoph Hellwig
2025-01-29 18:03 ` Keith Busch
2025-01-30 12:54 ` Christoph Hellwig
2025-01-29 15:35 ` Christoph Hellwig
2025-01-30 9:22 ` Kanchan Joshi
2025-01-30 12:53 ` Christoph Hellwig
2025-01-31 10:29 ` Kanchan Joshi
2025-01-31 10:42 ` Christoph Hellwig
2025-01-29 15:55 ` Mark Harmstone
2025-01-29 19:02 ` Goffredo Baroncelli
2025-01-30 9:33 ` Daniel Vacek
2025-01-30 20:21 ` Martin K. Petersen
2025-01-31 7:44 ` Christoph Hellwig
2025-02-03 19:31 ` Martin K. Petersen
2025-02-04 5:12 ` Christoph Hellwig
2025-02-04 12:52 ` Martin K. Petersen
2025-02-04 13:49 ` Christoph Hellwig
2025-02-05 2:31 ` Martin K. Petersen
2025-02-03 13:24 ` Kanchan Joshi
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