在 2013-02-07四的 18:54 +0100，Vasilis Liaskovitis写道： > Hi Senthil, > > On Mon, Feb 04, 2013 at 04:17:30PM +0530, kumaran wrote: > > Hi, > > > > I am Senthil, doing post graduation in IIT Bombay,India. > > > > I am looking for some problems related to KVM as part of my research > > work. I read about memory hotplug and other open issues in KVM. > > > > Can i be part of your work regarding memory hotplug. > > > > My Experience in KVM: > > > > - I have implemented Record and Replay feature in KVM > > - I have good hands on experience with KVM and QEMU's code base > > - Thorough knowledge about QEMU's architecture and PCI emulation > > - I have implemented Record and replay for Intel Ee100Pro network > > interface and for IDE disks (including DMA) > > > > If I get chance, I can spend around 5 dedicated months on this work. > > Please let me know your interest. > > thanks for your interest in the memory hotplug effort. You are welcome to > contribute. Memory hotplug is still not in mainline qemu. It is a qemu-wide > project rather than a kvm-specific one. > Some possible directions are: > > - reviewing / improvement suggestions on v4 here: > http://lists.nongnu.org/archive/html/qemu-devel/2012-12/msg02693.html > > - define the qom interface for Dimms. The current patches use a memory bus > abstraction (DimmBus) where Dimms can plugin. That's definitely one choice. > Some > people have suggested using <links> from the i440fx/mch (in general the memory > controller device of the emulated system) to the Dimm devices. That's similar > to how CPUs are re-modelled in qom-cpu patchsets I think. The final dimm > interface has not been agreed upon yet. > > - Add acpi native memory hotplug support for q35/ich9. The current code > creates > paravirtual Dimmbus + Dimms, without emulating real hotplug-capable memory > controller hardware. > > - Make sure ejection is safe i.e. all users of a hotplugged MemoryRegion > (not only guest/CPUs but also qemu block layer) have stopped using the memory, > before actually freeing it.
when can be considered 'have stopped using the memory' for 'MemoryRegion'? what I can see is only the devices used this 'MemoryRegion' decided to destroy memory region. > > make sure to include the qemu list (cc'ed) in order to let everyone know what > you > are working on and to get feedback. > > thanks, > > - Vasilis >
