https://bugzilla.kernel.org/show_bug.cgi?id=219602 Bug ID: 219602 Summary: Default of kvm.enable_virt_at_load breaks other virtualization solutions (by default) Product: Virtualization Version: unspecified Hardware: All OS: Linux Status: NEW Severity: normal Priority: P3 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: acmelab@xxxxxxxxx Regression: No Previously (kernel 6.11 and lower) VMs of other virtualization solutions such as VirtualBox could be started with the KVM module enabled. Since 6.12 setting kvm.enable_virt_at_load=0 needs to be set at boot if the KVM module is enabled, if you want to use other virtualization solution beside KVM. The commit that introduced the new behavior is https://github.com/torvalds/linux/commit/b4886fab6fb620b96ad7eeefb9801c42dfa91741. To be clear it is not about the feature itself, but the default. I am also aware that this might be intentional; but given it deviates from previous/expected behavior, it seems like a regression. The fix would be to set the feature to be off by default. This would be trivial, but first I need to know for sure that this is considered a bug. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
