On Mon, Jun 22, 2009 at 12:11:59PM +0200, Paolo Bonzini wrote: > Avi Kivity wrote: >> On 06/19/2009 01:15 PM, Paolo Bonzini wrote: >>> From: Paolo Bonzini<pbonzini@xxxxxxxxxx> >>> >>> KVM's optimization of guest port 80 accesses was removed last May 11 >>> in commit 99f85a. However, this probably has speed penalties. I don't >>> have a machine to test but the equivalent VMX patch (fdef3ad) reported >>> a speedup of 3-5%, and on the Xen mailing list it was mentioned that on >>> Xen passing port 80 through had positive effects on startup speed. >>> >>> We can enable passthrough to the same port the host kernel uses instead. >> >> Since we don't tell the guest to use 0xed, this won't help. > > Won't the guest do that automatically through DMI? > DMI that guest sees is very different from DMI of the host. What table is used to tell which port to use for io delay? -- Gleb. -- 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
