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1e8a7f6af9
Currently REQ_OP_ZONE_APPEND is handled by the bio_split_rw case in __bio_split_to_limits. This is harmful because REQ_OP_ZONE_APPEND bios do not adhere to the soft max_limits value but instead use their own capped version of max_hw_sectors, leading to incorrect splits that later blow up in bio_split. We still need the bio_split_rw logic to count nr_segs for blk-mq code, so add a new wrapper that passes in the right limit, and turns any bio that would need a split into an error as an additional debugging aid. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Tested-by: Hans Holmberg <hans.holmberg@wdc.com> Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com> Link: https://lore.kernel.org/r/20240826173820.1690925-4-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.