On Wed, 2017-07-12 at 09:26 +0100, John Garry wrote:
> > > What block driver controls the block device for which the performance
> > > regression
> > > has been observed? How many hardware queues were created by that block
> > > driver
> > > (see also /sys/block/*/mq/...)?
> 
> Just confirming that we have only 1 queue:
> /sys/block/sdc/mq/0 as example

Hello John,

Can you also check the I/O scheduler that has been selected?

Thanks,

Bart.

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