On Thu, Feb 14, 2013, Nakajima, Jun wrote about "Re: [Bug 53611] New: nVMX: Add nested EPT": > We have started looking at the pataches first. But I couldn't > reproduce the results by simply applying the original patches to v3.6: > - L2 Ubuntu 12.04 (64-bit) (smp 2) > - L1 Ubuntu 12.04 (64-bit) KVM (smp 2) > - L0 Ubuntu 12.04 (64-bit)-based. kernel/KVM is v3.6 + patches (the > ones in nept-v2.tgz). > https://bugzilla.kernel.org/attachment.cgi?id=93101 > > Without the patches, the L2 guest works. With it, it hangs at boot > time (just black screen): > - EPT was detected by L1 KVM. > - UP L2 didn't help. > - Looks like it's looping at EPT_walk_add_generic at the same address in L0. > > Will take a closer look. It would be helpful if the test configuration > (e.g kernel/commit id used, L1/L2 guests) was documented as well.
I sent the patches in August 1st, and they applied to commit ade38c311a0ad8c32e902fe1d0ae74d0d44bc71e from a week earlier. In most of my tests, L1 and L2 were old images - L1 had Linux 2.6.33, while L2 had Linux 2.6.28. In most of my tests both L1 and L2 were UP. I've heard another report of my patch not working with newer L1/L2 - the report said that L2 failed to boot (like you reported), and also that L1 became unstable (running anything in it gave a memory fault). So it is very likely that this code still has bugs - but since I already know of errors and holes that need to be plugged (see the announcement file together with the patches), it's not very surprising :( These patches definitely need some lovin', but it's easier than starting from scratch. Nadav. -- Nadav Har'El | Tuesday, Feb 26 2013, 16 Adar 5773 n...@math.technion.ac.il |----------------------------------------- Phone +972-523-790466, ICQ 13349191 |I think therefore I am. My computer http://nadav.harel.org.il |thinks for me, therefore I am not. -- 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
