Avi Kivity wrote: > This is a request for testing of an experimental kvm feature that > dramatically accelerates some Windows releases (when running with the > ACPI HAL, and especially with guest SMP). The feature detects accesses > by the guest to the Task Priority Register (TPR) and patches them at > runtime to a kvm-friendly code snipped that is provided by the BIOS. > > The upshot of all that is that > http://kvm.qumranet.com/kvmwiki/Windows_ACPI_Workaround is no longer > required, and Windows SMP no longer runs like a dog; it's quite snappy > from my very limited testing. > > Please download the test release from > http://people.qumranet.com/avi/tpr-opt-1.tar.gz and give it a spin. > Once it has received some exposure, I'll merge it into mainline. > > Credit for the original idea is due to Ben Serebrin. >
BTW, is it wise to enable this by default for all guests? Ignoring the fact that we're modifying guest's memory without its knowledge, if a guest unmaps the VA mappings for the BIOS then all sorts of problems could occur. Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
