Re: dm mpath: switch IO scheduler of underlying paths to "none" [was: Re: BFQ + dm-mpath]

2017-09-08 Thread Jens Axboe
On 09/08/2017 01:58 PM, Mike Snitzer wrote: > On Fri, Sep 08 2017 at 1:07pm -0400, > Mike Snitzer wrote: > >> On Fri, Sep 08 2017 at 12:48pm -0400, >> Jens Axboe wrote: >> Please see the following untested patch. All testing/review/comments/acks

Re: dm mpath: switch IO scheduler of underlying paths to "none" [was: Re: BFQ + dm-mpath]

2017-09-08 Thread Mike Snitzer
On Fri, Sep 08 2017 at 1:07pm -0400, Mike Snitzer wrote: > On Fri, Sep 08 2017 at 12:48pm -0400, > Jens Axboe wrote: > > > > Please see the following untested patch. All > > > testing/review/comments/acks appreciated. > > > > > > I elected to use

Re: dm mpath: switch IO scheduler of underlying paths to "none" [was: Re: BFQ + dm-mpath]

2017-09-08 Thread Mike Snitzer
On Fri, Sep 08 2017 at 12:48pm -0400, Jens Axboe wrote: > On 09/08/2017 10:41 AM, Mike Snitzer wrote: > > On Fri, Sep 08 2017 at 5:13P -0400, > > Paolo Valente wrote: > > > >> > >>> Il giorno 07 set 2017, alle ore 17:52, Mike Snitzer

Re: [PATCH] dm mpath: switch IO scheduler of underlying paths to "none" [was: Re: BFQ + dm-mpath]

2017-09-08 Thread Jens Axboe
On 09/08/2017 10:41 AM, Mike Snitzer wrote: > On Fri, Sep 08 2017 at 5:13P -0400, > Paolo Valente wrote: > >> >>> Il giorno 07 set 2017, alle ore 17:52, Mike Snitzer ha >>> scritto: >>> >>> On Tue, Sep 05 2017 at 10:15am -0400, >>> Bart Van Assche

[PATCH] dm mpath: switch IO scheduler of underlying paths to "none" [was: Re: BFQ + dm-mpath]

2017-09-08 Thread Mike Snitzer
On Fri, Sep 08 2017 at 5:13P -0400, Paolo Valente wrote: > > > Il giorno 07 set 2017, alle ore 17:52, Mike Snitzer ha > > scritto: > > > > On Tue, Sep 05 2017 at 10:15am -0400, > > Bart Van Assche wrote: > > > >> On

Re: BFQ + dm-mpath

2017-09-08 Thread Paolo Valente
> Il giorno 07 set 2017, alle ore 17:52, Mike Snitzer ha > scritto: > > On Tue, Sep 05 2017 at 10:15am -0400, > Bart Van Assche wrote: > >> On Tue, 2017-09-05 at 09:56 +0200, Paolo Valente wrote: >>> Ok, my suspects seem confirmed: the path

Re: BFQ + dm-mpath

2017-09-05 Thread Bart Van Assche
On Tue, 2017-09-05 at 09:56 +0200, Paolo Valente wrote: > Ok, my suspects seem confirmed: the path dm_mq_queue_rq -> map_request > -> setup_clone -> blk_rq_prep_clone creates a cloned request without > invoking e->type->ops.mq.prepare_request for the target elevator e. > The cloned request is

Re: BFQ + dm-mpath

2017-08-30 Thread Paolo Valente
> Il giorno 25 ago 2017, alle ore 01:16, Bart Van Assche > ha scritto: > > Hello Paolo, > Hi Bart > Has BFQ ever been tested in combination with dm-mpath? Unfortunately no. > A few seconds > after I had started a run of the srp-tests software with BFQ a kernel >