Sean Christopherson <seanjc@xxxxxxxxxx> writes: > On Mon, Mar 21, 2022, Paolo Bonzini wrote: >> On 3/18/22 17:48, Paolo Bonzini wrote: >> > This reverts commit cf3e26427c08ad9015956293ab389004ac6a338e. >> > >> > Multi-vCPU Hyper-V guests started crashing randomly on boot with the >> > latest kvm/queue and the problem can be bisected the problem to this >> > particular patch. ... > > Vitaly, can you provide repro instructions? A nearly-complete QEMU command line > would be wonderful :-) The issue was observed with genuine Hyper-V guests, with or without any Hyper-V enlightenments (not with Linux using Hyper-V enlightenments) The QEMU command line is nothing special, e.g. ~/qemu/build/qemu-system-x86_64 -machine q35,accel=kvm,kernel-irqchip=split -name guest=win2019 -cpu host -smp 16 -m 16384 -drive file=/home/VMs/ws2019_gen1.qcow2,format=qcow2,if=none,id=drive-ide0-0-0 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -vnc :0 -rtc base=localtime,driftfix=slew --no-hpet -monitor stdio --no-reboot I'm also pretty sure I saw this on both AMD and Intel hosts, I can try reproducing if needed. -- Vitaly
