Re: [Qemu-devel] [PATCH 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-14 Thread Cornelia Huck
On Mon, 14 May 2018 16:22:30 +0200 Halil Pasic wrote: > On 05/14/2018 03:45 PM, Cornelia Huck wrote: > > On Mon, 14 May 2018 14:40:13 +0200 > > Halil Pasic wrote: > > > >> On 05/14/2018 02:18 PM, Cornelia Huck wrote: > >>> On Thu, 10 May 2018 02:07:11 +0200 > >>> Halil Pasic wrote: > >>>

Re: [Qemu-devel] [PATCH 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-14 Thread Halil Pasic
On 05/14/2018 03:45 PM, Cornelia Huck wrote: On Mon, 14 May 2018 14:40:13 +0200 Halil Pasic wrote: On 05/14/2018 02:18 PM, Cornelia Huck wrote: On Thu, 10 May 2018 02:07:11 +0200 Halil Pasic wrote: There is at least one control program (guest) that although it does not I'd drop 'con

Re: [Qemu-devel] [PATCH 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-14 Thread Cornelia Huck
On Mon, 14 May 2018 14:40:13 +0200 Halil Pasic wrote: > On 05/14/2018 02:18 PM, Cornelia Huck wrote: > > On Thu, 10 May 2018 02:07:11 +0200 > > Halil Pasic wrote: > > > >> There is at least one control program (guest) that although it does not > > > > I'd drop 'control program' here as wel

Re: [Qemu-devel] [PATCH 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-14 Thread Halil Pasic
On 05/14/2018 02:18 PM, Cornelia Huck wrote: On Thu, 10 May 2018 02:07:11 +0200 Halil Pasic wrote: There is at least one control program (guest) that although it does not I'd drop 'control program' here as well, as it probably confuses more than helps. Will do (everywhere). rely on th

Re: [Qemu-devel] [PATCH 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-14 Thread Cornelia Huck
On Thu, 10 May 2018 02:07:11 +0200 Halil Pasic wrote: > There is at least one control program (guest) that although it does not I'd drop 'control program' here as well, as it probably confuses more than helps. > rely on the guarantees provided by ORB 1 word 9 bit (aka unlimited > prefetch, aka

[Qemu-devel] [PATCH 1/2] vfio-ccw: add force unlimited prefetch property

2018-05-09 Thread Halil Pasic
There is at least one control program (guest) that although it does not rely on the guarantees provided by ORB 1 word 9 bit (aka unlimited prefetch, aka P bit) not being set, fails to tell this to the machine. Usually this ain't a big deal, as the story is usually about performance optimizations o