On Fri, 11 Nov 2016 20:24:56 +0000 Paul Handy <paul.d.ha...@gmail.com> wrote:
> Thanks! I don't have to blacklist i915 now, and it behaves mostly the same > (with windows guest freaking out). One odd thing to note, all of the > addresses in my /proc/iomem are 000000000000-00000000000. I accidentally > had them load as actual values just a little while ago, but now I'm back to > all zeros. I think the forcefully-remove-bootfb module in my last message > may be the key I need in this case. /proc/iomem reports zeros now unless you're root, use sudo. It's a security measure. Thanks, Alex > On Fri, Nov 11, 2016, 10:49 AM Alex Williamson <alex.william...@redhat.com> > wrote: > > > On Fri, 11 Nov 2016 10:34:48 -0700 > > Alex Williamson <alex.william...@redhat.com> wrote: > > > > > On Fri, 11 Nov 2016 10:06:58 -0700 > > > Alex Williamson <alex.william...@redhat.com> wrote: > > > > > > > On Fri, 11 Nov 2016 09:52:49 -0700 > > > > Paul Handy <paul.d.ha...@gmail.com> wrote: > > > > > > > > > > As others have reported, I've gotten this message despite best > > efforts: > > > > > Failed to mmap 0000:00:02.0 BAR 2. Performance may be slow > > > > > > > > Are there any clues in /proc/iomem as to what might be consuming > > > > resources on the device? > > > > > > D'oh, you provided that, BOOTFB... whatever that is. > > > > Ok, this is simplefb and that driver apparently doesn't care that > > you're trying to disable it with simplefb:off. The approach I'd take > > would be to let i915 take the IGD device on boot, it's easier to deal > > with removing i915 and keeping it off the device than all these > > miscellaneous other driver grabbing it. So remove the i915 blacklist, > > remove the IGD device from the vfio-pci ids list, then create an rc > > script (or even @reboot crontab entry) that does: > > > > echo "vfio-pci" > /sys/bus/pci/devices/0000:00:02.0/driver_override > > > > Your libvirt <hostdev> entry should also set managed='yes', which is > > the default. The effect will be that the host boots with i915 claiming > > the device, when the VM is started libvirt will move it to vfio-pci, > > and when the VM is stopped, the driver_override will prevent i915 from > > reattaching to the device, which avoids the i915 driver issues on the > > host. So it's basically a one-way path from i915 to vfio-pci. The > > benefit is that unbinding i915 from the IGD should be clean and random > > other FB drivers won't be clinging to resources. Thanks, > > > > Alex > > _______________________________________________ vfio-users mailing list vfio-users@redhat.com https://www.redhat.com/mailman/listinfo/vfio-users
