On Tue, Oct 18, 2022 at 10:24:13AM +0200, Christoph Hellwig wrote: > On Tue, Oct 18, 2022 at 05:52:16AM +0200, Marek Marczykowski-Górecki wrote: > > not only) when using IGD in Xen PV dom0. After not very long time Xorg > > crashes, and dmesg contain messages like this: > > > > i915 0000:00:02.0: [drm] GPU HANG: ecode 7:1:01fffbfe, in Xorg [5337] > > i915 0000:00:02.0: [drm] Resetting rcs0 for stopped heartbeat on rcs0 > > i915 0000:00:02.0: [drm] Xorg[5337] context reset due to GPU hang > > <snip> > > > I tried reverting just this commit on top of 6.0.x, but the context > > changed significantly in subsequent commits, so after trying reverting > > it together with 3 or 4 more commits I gave up. > > > > What may be an important detail, the system heavily uses cross-VM shared > > memory (gntdev) to map window contents from VMs. This is Qubes OS, and > > it uses Xen 4.14. > > Can you try the patch below? Yes, this seems to help. And since this is a PV domain, with Jan proposed change it should work too. Intuitively this indeed should be PV-only thing (as was forcing swiotlb before). -- Best Regards, Marek Marczykowski-Górecki Invisible Things Lab
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