Hello Randy, On 5/27/20 6:58 PM, Randy Dunlap wrote: > On 5/27/20 1:09 PM, André Almeida wrote: >> Create a documentation providing a background and explanation around the >> operation of the Multi-Queue Block IO Queueing Mechanism (blk-mq). <snip> >> +Hardware dispatch queues >> +~~~~~~~~~~~~~~~~~~~~~~~~ >> + >> +The hardware queue is a memory space shared with the block device (e.g. DMA) >> +where the hardware can access and dispatch requests (represented by struct >> +:c:type:`blk_mq_hw_ctx`). To run this queue, the block layer removes >> +requests from the associated software queues and tries to dispatch to the >> +hardware. > > This paragraph (above) says to me that these HW devices understand struct blk_mq_hw_ctx. > Is that correct? Is is some kind of standard? If so, where? > This wasn't what I intended to say here. The struct blk_mq_hw_ctx is an abstraction from the blk-mq API used by device drivers to map the submission queue of the hardware. So no, HW devices can't understand struct blk_mq_hw_ctx. This paragraph was reworked for v2. > > thanks for the documentation. > Thanks for the feedback.
