On Thu, May 11, 2023, Sasha Levin wrote: > On Wed, May 10, 2023 at 02:57:22PM +0200, Salvatore Bonaccorso wrote: > > Hi > > > > After we updated the kernel in Debian bullseye from 5.10.162 to > > 5.10.178, we got a report from Jared Epp in > > https://bugs.debian.org/1035779 that a Windows Guest VM no longer > > booted, and Kernel reporting: > > This KVM commit wasn't tagged for stable, and would need an ack from the > KVM maintainers to apply. For grabbing commit 6470accc7ba9, Acked-by: Sean Christopherson <seanjc@xxxxxxxxxx> If it helps, Fixes: 6100066358ee ("KVM: Optimize kvm_make_vcpus_request_mask() a bit") That optimization got pulled in without the undocumented dependency due to: Stable-dep-of: 2b0128127373 ("KVM: Register /dev/kvm as the _very_ last thing during initialization")