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7222657e51
Just like blk_mq_alloc_tag_set(), it's better to prepare all tags before using to map to queue ctxs in blk_mq_map_swqueue(), which now have to consider empty set->tags[]. The good point is that we can fallback easily if increasing nr_hw_queues fail, instead of just mapping to hctx[0] when fail in blk_mq_map_swqueue(). And the fallback path already has tags free & clean handling, so all is good. Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20230821095602.70742-3-chengming.zhou@linux.dev Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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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 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.