Source: linux Version: 5.6.7-1 Control: submitter -1 deb...@the-jedi.co.uk Forwarding this report as bug in the BTS.
On Mon, May 25, 2020 at 09:03:43PM +0100, Simon John wrote: > Sorry to email directly but I've tried reportbug but it doesn't seem to work > with the kernel packages. What exactly did not work? > The 5.6.0-1 kernel in Sid when used in conjunction with VFIO (PCI > passthrough) guests in Qemu-KVM causes KVM to crash with no useful logs - > the guest partially starts. Eventually the host slows down and needs to be > powered off. Doesn't affect non-VFIO guests using spice/headless, only when > passing through a PCIe graphics card or USB keyboard/mouse. > > 5.6.0-2 that just landed makes this infinitely worse - as soon as you start > a VFIO guest the host hard crashes. > > 5.3/5.4/5.5 kernels do not have this problem with the same version of Qemu > and reverting from qemu 5.0 to 4.2 doesn't help, so it must be the 5.6 > kernel causing the issue. > > Not sure what logs or any useful information I can supply you, there's some > interesting comments on this reddit thread suggesting a couple of bugs that > have fixes upstream: > > https://www.reddit.com/r/VFIO/comments/glfgqs/qemu_5_vfio_no_longer_works_on_debian/ > > I'm using macos catalina and win10 guests to reproduce the issue, and using > Intel not AMD chips. > > Cheers. > > -- > Simon John Regards, Salvatore
