This patch is to remove the redundant MSR save/restore at lightweight VM
EXIT time. With this patch VMX guest KB performance can increase 17-37%.
(I only tested it on KVM-18 since the git tree still has problem in my
side, but I'd like to post this earlier to collect more feedback)
Thanks, eddie
Dong, Eddie wrote:
Avi:
Thanks!
Another found is that HOST_FS/GS_BASE MSR_FS/GS_BASE
save/restore is quit expansive. I am not sure why it needs to be
save/restored given that the VMCS regster will be loaded into FS/gs at
VM EXIT time automatically by HW and will not be changed
