https://bugzilla.kernel.org/show_bug.cgi?id=207489 Pol Van Aubel (linux-kernel@xxxxxxxxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |CODE_FIX --- Comment #17 from Pol Van Aubel (linux-kernel@xxxxxxxxxxxxxxx) --- (In reply to Yani Stoyanov from comment #16) > Kernel 5.8+ > on Fedora 32 > > I have the same issue with macos (sierra and catalina) virtual machines with > passed through gpus. > > What I do to identify the problem: > > Try adding different cards to the mac vm's no matter amd/nvidia the vm hangs > and if you try to restart/force restart it the whole libvirt process hangs. > > I get the same kernel overflow as mentioned in the bug. > > How I am sure its the same problem: > > I checked out the kernel source comment the problematic: > > if (edge && kvm_apicv_activated(ioapic->kvm)) > ioapic_lazy_update_eoi(ioapic, irq); > > Rebuild the kernel and try with my version and it was working fine. I also > try kernel 5.5.19 where it was fine also since it didn't have the check. > > I assume macos have some special way of treating the interrupts but since I > am new to the linux kernel and linux as hole I can not identify what exactly > case the problem. The fix to the bug I reported works for me and has made it into kernel 5.7 since v5.7-rc5. I'm therefore updating the status of this particular bug to resolved. Your problem seems to be with the ioapic_lazy_update_eoi mechanism regardless of how it is triggered, and you should open a new report -- with all the relevant information like debug logs -- for your issue if it's not been resolved yet. -- You are receiving this mail because: You are on the CC list for the bug. You are watching the assignee of the bug.
