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Christoph Hellwig
e7602bb4f3
The only queues that really can't support a scheduler are those that do not have a gendisk associated with them, and thus can't be used for non-passthrough commands. In addition to those null_blk can optionally set the flag, which is a bad odd. Replace the null_blk usage with BLK_MQ_F_NO_SCHED_BY_DEFAULT to keep the expected semantics and then remove BLK_MQ_F_NO_SCHED as the non-disk queues never call into elevator_init_mq or blk_register_queue which adds the sysfs attributes. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20250106083531.799976-4-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.