From: Christoph Hellwig <hch@lst.de>
To: Pavel Begunkov <asml.silence@gmail.com>
Cc: "Christoph Hellwig" <hch@lst.de>, "Jens Axboe" <axboe@kernel.dk>,
"Keith Busch" <kbusch@kernel.org>,
"Sagi Grimberg" <sagi@grimberg.me>,
"Alexander Viro" <viro@zeniv.linux.org.uk>,
"Christian Brauner" <brauner@kernel.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Christian König" <christian.koenig@amd.com>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org,
io-uring@vger.kernel.org, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org,
"Nitesh Shetty" <nj.shetty@samsung.com>,
"Kanchan Joshi" <joshi.k@samsung.com>,
"Anuj Gupta" <anuj20.g@samsung.com>,
"Tushar Gohad" <tushar.gohad@intel.com>,
"William Power" <william.power@intel.com>,
"Phil Cayton" <phil.cayton@intel.com>,
"Jason Gunthorpe" <jgg@nvidia.com>
Subject: Re: [PATCH v3 04/10] block: introduce dma map backed bio type
Date: Wed, 20 May 2026 10:30:43 +0200 [thread overview]
Message-ID: <20260520083043.GA18893@lst.de> (raw)
In-Reply-To: <24833f76-2289-4859-86d1-9215b11a1258@gmail.com>
On Mon, May 18, 2026 at 11:29:54AM +0100, Pavel Begunkov wrote:
>>> BIO_ZONE_WRITE_PLUGGING, /* bio handled through zone write plugging */
>>> BIO_EMULATES_ZONE_APPEND, /* bio emulates a zone append operation */
>>> + BIO_DMABUF_MAP, /* Using premmaped dma buffers */
>>
>> Shouldn't this be a REQ_ flag as we should never mix and match bios with
>> and without this flag in a single request?
>
> Do you mean adding both and propagating it from bio to req? submit_bio()
> takes a bio, so we still need to set it there before it reaches blk-mq.
> And there might be bio-based drivers using it in the future.
I think I forgot to reply to this, so let's do this now.
REQ_ is actually used by both bios and requests, so if you set it in
bio->bi_opf it will automatically get propagated to the request, but
it can also always be tested on the bio, including by bio-based
drivers.
next prev parent reply other threads:[~2026-05-20 8:30 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 15:25 [PATCH v3 00/10] Add dmabuf read/write via io_uring Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 01/10] file: add callback for creating long-term dmabuf maps Pavel Begunkov
2026-04-30 6:03 ` Christian König
2026-04-30 18:33 ` Pavel Begunkov
2026-05-04 7:14 ` Christian König
2026-05-13 8:11 ` Christoph Hellwig
2026-04-29 15:25 ` [PATCH v3 02/10] iov_iter: add iterator type for " Pavel Begunkov
2026-05-13 8:11 ` Christoph Hellwig
2026-05-13 10:05 ` David Laight
2026-05-13 13:29 ` David Laight
2026-05-18 9:24 ` Pavel Begunkov
2026-05-18 10:40 ` David Laight
2026-04-29 15:25 ` [PATCH v3 03/10] block: move bvec init into __bio_clone Pavel Begunkov
2026-05-13 8:12 ` Christoph Hellwig
2026-05-18 9:10 ` Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 04/10] block: introduce dma map backed bio type Pavel Begunkov
2026-05-13 8:19 ` Christoph Hellwig
2026-05-18 10:29 ` Pavel Begunkov
2026-05-18 12:22 ` Christian König
2026-05-18 12:40 ` Pavel Begunkov
2026-05-18 12:57 ` Christoph Hellwig
2026-05-18 13:59 ` Pavel Begunkov
2026-05-18 12:54 ` Christoph Hellwig
2026-05-19 9:21 ` David Laight
2026-05-20 8:30 ` Christoph Hellwig [this message]
2026-05-25 7:29 ` Pavel Begunkov
2026-05-13 8:39 ` Christoph Hellwig
2026-05-18 9:11 ` Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 05/10] lib: add dmabuf token infrastructure Pavel Begunkov
2026-05-13 8:24 ` Christoph Hellwig
2026-05-18 10:14 ` Pavel Begunkov
2026-05-18 12:53 ` Christoph Hellwig
2026-05-18 14:23 ` Pavel Begunkov
2026-05-19 6:56 ` Christoph Hellwig
2026-05-19 7:55 ` Pavel Begunkov
2026-05-19 9:25 ` Christoph Hellwig
2026-05-18 11:24 ` Markus Elfring
2026-05-18 14:02 ` Markus Elfring
2026-04-29 15:25 ` [PATCH v3 06/10] block: forward create_dmabuf_token to drivers Pavel Begunkov
2026-05-13 8:25 ` Christoph Hellwig
2026-05-18 9:13 ` Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 07/10] nvme-pci: implement dma_token backed requests Pavel Begunkov
2026-04-29 15:29 ` Pavel Begunkov
2026-04-29 16:07 ` Maurizio Lombardi
2026-04-30 18:18 ` Pavel Begunkov
2026-05-13 8:38 ` Christoph Hellwig
2026-05-18 9:29 ` Pavel Begunkov
2026-05-18 10:18 ` Anuj Gupta/Anuj Gupta
2026-05-18 10:30 ` Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 08/10] io_uring/rsrc: introduce buf registration structure Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 09/10] io_uring/rsrc: extend buffer update Pavel Begunkov
2026-04-29 15:25 ` [PATCH v3 10/10] io_uring/rsrc: add dmabuf backed registered buffers Pavel Begunkov
2026-05-04 15:29 ` [PATCH v3 00/10] Add dmabuf read/write via io_uring Ming Lei
2026-05-06 9:02 ` Pavel Begunkov
2026-05-07 9:50 ` Ming Lei
2026-05-12 9:30 ` Pavel Begunkov
2026-05-12 7:00 ` Christoph Hellwig
2026-05-12 9:30 ` Pavel Begunkov
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