Blk-mq Gets Further Improved With Linux 3.19, NVME Gets Ported
While blk-mq is already considered feature complete and delivering great performance, with Linux 3.19 will come more improvements.
Jens Axboe mailed in the core block I/O improvements on Friday for the Linux 3.19 merge window. He characterized the core block I/O bits as "mostly lots of little good fixes" and among them are various updates, fixes, and improvements for blk-mq.
On Saturday, Jens Axboe then sent in the block driver updates for Linux 3.19. After having gone through many code revisions, the NVMe block driver was converted to being a blk-mq driver. The blk-mq-based NVMe driver implementation is simpler and will hopefully offer greater performance too. The NVMe Linux kernel driver is responsible for supporting storage devices using the NVM Express specification with solid-state drives attached via the PCI Express bus.
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