On Tue, 2017-07-11 at 11:22 +0100, John Garry wrote: > On 10/07/2017 16:50, Bart Van Assche wrote: > > Since a fix for the performance regression triggered by this patch will be upstream > > soon (see also https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?h=for-linus&id=32825c45ff8f4cce937ab85b030dc693ceb1aa0a): > > > > FYI, on linux-next 20170711 (which now includes the above patch Bart > mentioned) we see a large performance regression on hisi_sas (LLDD does > not config shost for mq). > > fio read mode iops goes from ~833K (scsi_mod.use_blk_mq=n on cmdline) to > ~320K Hello John, Thanks for the feedback. Is the kernel config with which these measurements were performed available somewhere? Bart.
