From: Anuj Gupta <anuj1072538@gmail.com>
To: asml.silence@gmail.com, hch@lst.de, djwong@kernel.org,
cem@kernel.org, brauner@kernel.org, axboe@kernel.dk
Cc: linux-block@vger.kernel.org, linux-xfs@vger.kernel.org,
linux-fsdevel@vger.kernel.org, joshi.k@samsung.com,
anuj20.g@samsung.com, nj.shetty@samsung.com
Subject: [RFC 0/4] fs: support dma-buf backed direct I/O
Date: Fri, 16 Oct 2026 14:49:10 +0530 [thread overview]
Message-ID: <20261016091919.971295-1-anuj1072538@gmail.com> (raw)
This series lets an application register a dma-buf against a file,
so reads and writes go directly to the device as dma-buf backed
bios with no per-command DMA mapping.
This series builds on Pavel Begunkov's dma-buf block support v11,
https://lore.kernel.org/all/cover.1791975048.git.asml.silence@gmail.com/
which is queued in Jens Axboe's tree:
https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux.git/log/?h=for-7.4/io_uring-dmabuf
A separate kernel tree is present here:
https://github.com/anuj7781/linux-kernel/tree/anuj/fs-dmabuf-rfc-v11-desc-v2
Nitesh Shetty (4):
block: factor out bdev_init_dma_buf_io_ctx()
block: refuse a dma-buf bio for a disk the buffer was not registered
on
iomap: add dma-buf direct I/O guards and registration helper
xfs: support dma-buf registered buffers for direct I/O
block/bio.c | 15 +++++++++++++++
block/fops.c | 19 +++++++++++++++----
fs/iomap/direct-io.c | 31 ++++++++++++++++++++++++++++++-
fs/xfs/xfs_file.c | 30 ++++++++++++++++++++++++++++++
include/linux/blkdev.h | 3 +++
include/linux/dma-buf-io.h | 2 ++
include/linux/iomap.h | 3 +++
7 files changed, 98 insertions(+), 5 deletions(-)
--
2.43.0
next reply other threads:[~2026-10-16 9:19 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-16 9:19 Anuj Gupta [this message]
2026-10-16 9:19 ` [RFC 1/4] block: factor out bdev_init_dma_buf_io_ctx() Anuj Gupta
2026-10-16 9:23 ` Christoph Hellwig
2026-10-16 9:19 ` [RFC 2/4] block: refuse a dma-buf bio for a disk the buffer was not registered on Anuj Gupta
2026-10-16 9:24 ` Christoph Hellwig
2026-10-16 9:19 ` [RFC 3/4] iomap: add dma-buf direct I/O guards and registration helper Anuj Gupta
2026-10-16 9:26 ` Christoph Hellwig
2026-10-16 9:19 ` [RFC 4/4] xfs: support dma-buf registered buffers for direct I/O Anuj Gupta
2026-10-16 9:28 ` Christoph Hellwig
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