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In blk_mq_sched_dispatch_requests(), we call blk_mq_sched_mark_restart() after we dispatch requests left over on our hardware queue dispatch list. This is so we'll go back and dispatch requests from the scheduler. In this case, it's only necessary to restart the hardware queue that we are running; there's no reason to run other hardware queues just because we are using shared tags. So, split out blk_mq_sched_mark_restart() into two operations, one for just the hardware queue and one for the whole request queue. The core code only needs the hctx variant, but I/O schedulers will want to use both. This also requires adjusting blk_mq_sched_restart_queues() to always check the queue restart flag, not just when using shared tags. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.