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 Restructured Text 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.
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Kemeng Shi
authored
1. Remove check of needs_resource and ret == BLK_STS_DEV_RESOURCE. For busy error BLK_STS*_RESOURCE, request will always be added back to list, so need_resource will not be true and ret will not be == BLK_STS_DEV_RESOURCE if list is empty. We could remove these dead check. 2. Check ret of last request instead of errors If list is empty, we only need to explicitly commit_rqs if error happens at last request which is stored in ret. So check ret of last request instead of errors to remove unnecessary commit_rqs triggered by errors returned from previous request. Signed-off-by:Kemeng Shi <shikemeng@huaweicloud.com> Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Jens Axboe <axboe@kernel.dk>