On Tue, Sep 28, 2010 at 05:44:09PM +0800, Sheng Yang wrote: > Hi Avi & Marcelo > > This patchset would add emulation of MSI-X mask bit for assigned devices in > QEmu. > > BTW: We are also purposed an acceleration of MSI-X mask bit for KVM - to get > it done in kernel. That's because sometime MSI-X mask bit was accessed very > frequently by guest and emulation in QEmu cost a lot(tens to hundreds percent > CPU utilization sometime), e.g. guest using Linux 2.6.18 or under some heavy > workload. The method has been proved efficient in Xen, but it would require > VMM to handle MSI-X table. Is that OK with you?
It would be good to understand where that cost is, before. Eg. do you commit kvm irq route frequently when guest unmasks? -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
