Re: Poor windows VFIO performance, GPU stalls (bisected)

2020-07-26 Thread Chris Wilson
Quoting Alex Williamson (2020-07-26 14:30:52) > On Sun, 26 Jul 2020 17:49:07 +1000 > Geoffrey McRae wrote: > > > Hi All, > > > > The commit 22540ca3d00d2990a4148a13b92209c3dc5422db causes a Windows KVM > > guest running under QEMU with a VFIO passthrough GPU to randomly stall > > when using

Re: Poor windows VFIO performance, GPU stalls (bisected)

2020-07-26 Thread Geoffrey McRae
On 2020-07-26 23:32, Geoffrey McRae wrote: On 2020-07-26 23:30, Alex Williamson wrote: On Sun, 26 Jul 2020 17:49:07 +1000 Geoffrey McRae wrote: Hi All, The commit 22540ca3d00d2990a4148a13b92209c3dc5422db causes a Windows KVM guest running under QEMU with a VFIO passthrough GPU to

Re: Poor windows VFIO performance, GPU stalls (bisected)

2020-07-26 Thread Geoffrey McRae
On 2020-07-26 23:30, Alex Williamson wrote: On Sun, 26 Jul 2020 17:49:07 +1000 Geoffrey McRae wrote: Hi All, The commit 22540ca3d00d2990a4148a13b92209c3dc5422db causes a Windows KVM guest running under QEMU with a VFIO passthrough GPU to randomly stall when using the GPU leading to the

Re: Poor windows VFIO performance, GPU stalls (bisected)

2020-07-26 Thread Alex Williamson
On Sun, 26 Jul 2020 17:49:07 +1000 Geoffrey McRae wrote: > Hi All, > > The commit 22540ca3d00d2990a4148a13b92209c3dc5422db causes a Windows KVM > guest running under QEMU with a VFIO passthrough GPU to randomly stall > when using the GPU leading to the guest assuming that the driver has >

Poor windows VFIO performance, GPU stalls (bisected)

2020-07-26 Thread Geoffrey McRae
Hi All, The commit 22540ca3d00d2990a4148a13b92209c3dc5422db causes a Windows KVM guest running under QEMU with a VFIO passthrough GPU to randomly stall when using the GPU leading to the guest assuming that the driver has hung. Reverting this commit resolves the problem. The host system is