On Thursday, September 24, 2015 09:45:09 AM Rich Freeman wrote: > On Thu, Sep 24, 2015 at 9:22 AM, J. Roeleveld <jo...@antarean.org> wrote: > > For PV, grub is actually more work to get working. There is a config > > option for the commandline. I will send one of mine later today.
Please see email from Håkon Alstadheim for the example. > I can believe that. My only experience is with Amazon, which doesn't > give you any control over the host xen. It just runs grub with a > grub.cfg you provide if you want to run your own kernel (unless that > has changed). Sounds like pvgrub. I never looked into setting that up, afaiui, it mounts the guest filesystem, grabs the grub.cfg, grabs the kernel listed there, umounts, then boots the guest. > > Does EC2 actually provide PV guests? > > With PV, the guest knows it's a guest and communicates with Xen. Non-PV > > has an emulation layer (qemu) running on the host that hides the > > virtualisation from the guest. Special drivers on the guest can help with > > performance, but isn't necessary to get it to work. > I believe that EC2 ONLY provides PV guests. I don't believe it will > do full virtualization for linux guests. They do provide windows > guests, and I'm not sure of the details of how that is done. If you > want to run a linux guest you either use one of their kernels, or you > can run your own as long as it supports Xen PV. Windows guests will run in PVH mode as I doubt Microsoft has a PV-enabled kernel available for Amazon :) -- Joost
