On Mon, Jun 19, 2017 at 03:49:43PM +0800, Ye Xiaolong wrote:
> On 06/19, Christoph Hellwig wrote:
> >On Mon, Jun 19, 2017 at 02:03:18PM +0800, kernel test robot wrote:
> >> 
> >> Greeting,
> >> 
> >> FYI, we noticed a -4% regression of fio.write_bw_MBps due to commit:
> >
> >What does cat /sys/block/<device>/queue/scheduler say for your test?
> >Can you try with mq-deadline or bfq and see what the results are?
> Could you tell me how to do it? via changing kernel config?

BFQ doesn't seem to be enabled in the config, so it would have to be

I've not seen a compile-time option for the MQ I/O scheduler (unlike
the legacy one), so the way to change it would be to echo the name to

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