From: Christoph Hellwig <hch@lst.de>
To: Pavel Begunkov <asml.silence@gmail.com>
Cc: "Christoph Hellwig" <hch@lst.de>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
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"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
"Keith Busch" <kbusch@kernel.org>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
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"Jan Kara" <jack@suse.cz>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Jens Axboe" <axboe@kernel.dk>,
"Nitesh Shetty" <nj.shetty@samsung.com>,
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"Mikulas Patocka" <mpatocka@redhat.com>,
"Benjamin Marzinski" <bmarzins@redhat.com>,
dm-devel@lists.linux.dev
Subject: Re: [PATCH v6 04/13] block: introduce dma map backed bio type
Date: Wed, 23 Sep 2026 06:51:43 +0200 [thread overview]
Message-ID: <20260923045143.GA26231@lst.de> (raw)
In-Reply-To: <cce62c72-278a-44d1-9cf7-e0beb0b72688@gmail.com>
On Tue, Sep 22, 2026 at 02:54:25PM +0100, Pavel Begunkov wrote:
>>
>> Can you please expland on the splitting considerations a bit? Preferably
>> both in a comment for the details, and in the commit log for how we
>> arrived at them and why they are fine for now?
>
> I'll add something to the commit log, but not sure which specific
> details in comments you mean. Do you want me to expand the comment
> above limiting the number of segments? Maybe I should add there that
> it's stricter than necessary and might cause more splitting than
> necessary? This one:
Yes, explain why we apply a relatively arbitrary limit not fully
exploiting the hardware capabilities, and why we thing that is okay.
next prev parent reply other threads:[~2026-09-23 4:51 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-21 13:38 [PATCH v6 00/13] Add dmabuf read/write via io_uring Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 01/13] dma-buf: introduce initial file I/O infrastructure Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 02/13] iov_iter: add iterator type for dmabuf maps Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 03/13] block: always adjust bi_offset on bio_advance_iter Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 04/13] block: introduce dma map backed bio type Pavel Begunkov
2026-09-22 13:16 ` Christoph Hellwig
2026-09-22 13:54 ` Pavel Begunkov
2026-09-23 4:51 ` Christoph Hellwig [this message]
2026-09-21 13:38 ` [PATCH v6 05/13] block: add dma-buf support for raw bdev Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 06/13] nvme-pci: implement dma-buf backed requests Pavel Begunkov
2026-09-22 13:20 ` Christoph Hellwig
2026-09-22 13:37 ` Pavel Begunkov
2026-09-23 4:55 ` Christoph Hellwig
2026-09-21 13:38 ` [PATCH v6 07/13] nvme-pci: rename nvme_pci_sgl_set_data to nvme_pci_dma_iter_set_sgl Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 08/13] nvme-pci: add SGL support for the dmabuf path Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 09/13] io_uring/rsrc: introduce buf registration structure Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 10/13] io_uring/rsrc: extend buffer update Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 11/13] io_uring/rsrc: add uncloneable regbuf flag Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 12/13] io_uring/rsrc: add regbuf import flags Pavel Begunkov
2026-09-21 13:38 ` [PATCH v6 13/13] io_uring/rsrc: add dmabuf backed registered buffers Pavel Begunkov
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