On Tue, Mar 06, 2012, Avi Kivity wrote about "[PATCH] KVM: VMX: Fix delayed load of shared MSRs": > Shared MSRs (MSR_*STAR and related) are stored in both vmx->guest_msrs > and in the CPU registers, but vmx_set_msr() only updated memory. Prior > to 46199f33c2953, this didn't matter, since we called vmx_load_host_state(), > which scheduled a vmx_save_host_state(), which re-synchronized the CPU > state, but now we don't, so the CPU state will not be synchronized until > the next exit to host userspace. This mostly affects nested vmx workloads, > which play with these MSRs a lot. Thanks. I checked this patch, and indeed it solves the bug with nested VMX. -- Nadav Har'El | Tuesday, Mar 6 2012, nyh@xxxxxxxxxxxxxxxxxxx |----------------------------------------- Phone +972-523-790466, ICQ 13349191 |I think therefore I am. My computer http://nadav.harel.org.il |thinks for me, therefore I am not. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
