> > Yes. FlexPriority will be both faster and safer for those who have it > than my hack. > > It may turn out that patching can improve performance even with > FlexPriority: we can patch the APIC EOI write to look if any > interrupts are pending, and only exit if the EOI will result in a new > interrupt being injected. But it is very possible that this will not > be necessary if we can achieve good interrupt mitigation with virtio. > Mmm, I won't say so. The issues is: A guest EOI (level triggered IRQ) need to clear remote IRR bit in IOAPIC side and resample that pin in IOAPIC side. This one is not easy to do in patched code.
thx,eddie ------------------------------------------------------------------------- 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
