Software staging queues
~~~~~~~~~~~~~~~~~~~~~~~
-The block IO subsystem adds requests in the software staging queues
+The block IO subsystem adds requests in the software staging queues
(represented by struct blk_mq_ctx) in case that they weren't sent
directly to the driver. A request is one or more BIOs. They arrived at the
block layer through the data structure struct bio. The block layer
identified by an integer, ranging from 0 to the dispatch queue size. This tag
is generated by the block layer and later reused by the device driver, removing
the need to create a redundant identifier. When a request is completed in the
-drive, the tag is sent back to the block layer to notify it of the finalization.
+driver, the tag is sent back to the block layer to notify it of the finalization.
This removes the need to do a linear search to find out which IO has been
completed.