Re: [RFC PATCH v1] x86/split_lock: Provide KVM helper to log guest bus lock exits

Sean Christopherson
2026-03-31T17:34:29Z

On Tue, Mar 24, 2026, Manali Shukla wrote:
> The intent is purely observational — give hypervisor owners
> visibility into which guest is generating bus locks so they can act
> accordingly. No policy enforcement is done in the kernel. Suggestions
> on the approach are welcome.

This makes no sense. KVM is exiting to userspace, the hypervisor owner doesn't
need to grep dmesg to understand *exactly* what vCPU is generating bus locks.