Hi, I have finally pushed here [1] the current WIP branch of bfq for blk-mq, which I have tentatively named bfq-mq. This branch *IS NOT* meant for merging into mainline and contain code that mau easily violate code style, and not only, in many places. Commits implement the following main steps: 1) Add the last version of bfq for blk 2) Clone bfq source files into identical bfq-mq source files 3) Modify bfq-mq files to get a working version of bfq for blk-mq (cgroups support not yet functional) In my intentions, the main goals of this branch are: 1) Show, as soon as I could, the changes I made to let bfq-mq comply with blk-mq-sched framework. I though this could be particularly useful for Jens, being BFQ identical to CFQ in terms of hook interfaces and io-context handling, and almost identical in terms request-merging. 2) Enable people to test this first version bfq-mq. Code is purposely overfull of log messages and invariant checks that halt the system on failure (lock assertions, BUG_ONs, ...). To make it easier to revise commits, I'm sending the patches that transform bfq into bfq-mq (last four patches in the branch [1]). They work on two files, bfq-mq-iosched.c and bfq-mq.h, which, at the beginning, are just copies of bfq-iosched.c and bfq.h. Thanks, Paolo [1] https://github.com/Algodev-github/bfq-mq Paolo Valente (4): blk-mq: pass bio to blk_mq_sched_get_rq_priv Move thinktime from bic to bfqq Embed bfq-ioc.c and add locking on request queue Modify interface and operation to comply with blk-mq-sched block/bfq-cgroup.c | 4 - block/bfq-mq-iosched.c | 852 +++++++++++++++++++++++++++++------------------ block/bfq-mq.h | 65 ++-- block/blk-mq-sched.c | 8 +- block/blk-mq-sched.h | 5 +- include/linux/elevator.h | 2 +- 6 files changed, 567 insertions(+), 369 deletions(-) -- 2.10.0
