On Tue 31-08-21 11:59:30, Michal Koutný wrote: > Hello Paolo. > > On Fri, Aug 27, 2021 at 12:07:20PM +0200, Paolo Valente <paolo.valente@xxxxxxxxxx> wrote: > > Before discussing your patches in detail, I need a little help on this > > point. You state that the number of scheduler tags must be larger > > than the number of device tags. So, I expected some of your patches > > to address somehow this issue, e.g., by increasing the number of > > scheduler tags. Yet I have not found such a change. Did I miss > > something? > > I believe Jan's conclusions so far are based on "manual" modifications > of available scheduler tags by /sys/block/$dev/queue/nr_requests. > Finding a good default value may be an additional change. Exactly. So far I was manually increasing nr_requests. I agree that improving the default nr_requests value selection would be desirable as well so that manual tuning is not needed. But for now I've left that aside. Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
