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Blk-mq Is Almost Feature Complete & Fast With Linux 3.16

Linux Kernel

Published on 02 June 2014 11:10 AM EDT
Written by Michael Larabel in Linux Kernel
15 Comments

Merged for the Linux 3.13 kernel was the multi-queue block layer allows for better SSD performance with reduced latency and by balancing I/O workload across multiple CPU cores and supporting multiple hardware queues. With the upcoming Linux 3.16 kernel, the "blk-mq" code is expected to be feature complete and deliver great performance.

Jens Axboe sent in the pull request today for the core block I/O bits for the Linux 3.16 merge window. The new Facebook employee mentions that lots of development effort has gone into this block multi-queue code in recent months and "we're heading to where 3.16 will be a feature complete and performant blk-mq." A SCSI multi-queue implementation (scsi-mq) is expected to come for the Linux 3.17 kernel.

This 3.16 core block I/O pull request has some prep/support patches for scsi-mq, API and code clean-ups for blk-mq, and various other enhancements. Those unfamiliar with the multi-queue block layer can find out earlier articles on blk-mq.

Blk-mq Is Almost Feature Complete & Fast With Linux 3.16


This latest pull request for the Linux 3.16 kernel can be found via lkml.iu.edu.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
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