On Thu, 08 Mar 2018 00:07:07 +0530 "Naveen N. Rao" <naveen.n....@linux.vnet.ibm.com> wrote:
> Yes, that's negligible. > Though, to be honest, I will have to introduce a 'mfmsr' for the older > -pg variant. I still think that the improved reliability far outweighs > the minor slowdown there. In that case, can you introduce a read_mostly variable that can be tested before calling the mfmsr. Why punish normal ftrace tracing if kvm is not enabled or running? Both should probably have an #ifdef CONFIG_KVM encapsulating the code. -- Steve
