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Christoph Hellwig 7044259018 block: take chunk_sectors into account in bio_split_write_zeroes 
[ Upstream commit 60dc5ea6bc ]

For zoned devices, write zeroes must be split at the zone boundary
which is represented as chunk_sectors.  For other uses like the
internally RAIDed NVMe devices it is probably at least useful.

Enhance get_max_io_size to know about write zeroes and use it in
bio_split_write_zeroes.  Also add a comment about the seemingly
nonsensical zero max_write_zeroes limit.

Fixes: 885fa13f65 ("block: implement splitting of REQ_OP_WRITE_ZEROES bios")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20241104062647.91160-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-12-05 14:01:14 +01:00
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README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.