Great information, and straight from the source! Can you tell me on which version of KVM support for TPR was implemented? I assume I am not up to said version, but I want to confirm, because when I start my Windows guests (currently all uniprocessor) in KVM, csrss.exe uses all available processor constantly until I follow the KVM Windows ACPI workaround directions. I have updated since December, but I am running Fedora 7 rpms, so I may have to move up a version or two to get that support. Thanks, Dustin -----Original Message----- From: Avi Kivity [mailto:avi@xxxxxxxxxxxx] Sent: Tuesday, May 20, 2008 11:55 To: Dustin.Henning@xxxxxxxxxxx Cc: fedora-xen@xxxxxxxxxx Subject: Re: HVM DomU on F9? Dustin Henning wrote: > I actually prefer to run HVM DomUs in a regular kernel if possible > because I have always had mouse problems in Dom0 of F7, but not in the base > kernel. I understand that KVM is an option, but since Xen now supports > Windows with ACPI (without the degradation that was once common in Xen and > is still common in KVM because of a certain ACPI register apparently > regularly polled by Windows [I would love to know what register, as I could > It's called that Task Priority Register, or TPR. > then try to find a way to prevent Windows from doing that and KVM might > perform as well as Xen]), I feel that KVM would be a big step backwards. > For uniprocessor guests, kvm supports TPR optimization (since December 2007). It's disabled on SMP guests due to stability issues, unfortunately. > Additionally, there are apparently more paravirtual drivers available for > Windows (though they are not readily available in binary form and stable, > more on that in my next message), though using std-vga in KVM is nice (with > standard VESA 2.0, a generic Windows driver already exists outside of the > project). A paravirtualized network driver is freely available for kvm. It is still not fully stable under heavy loads, though. We expect to fix this soon. -- error compiling committee.c: too many arguments to function -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen
