On Wed, Aug 11, 2010 at 9:32 AM, Gleb Natapov <gleb@xxxxxxxxxx> wrote: > On Wed, Aug 11, 2010 at 07:29:22AM -0700, Freddie Cash wrote: >> We just upgraded our KVM host system from KVM-72 to qemu-kvm 0.12.4 >> (debian lenny backports). We are now unable to start any VMs that use >> -smp option with values > 1 (-smp 1 works, -smp 2 doesn't). >> Everything else is the same (nothing in the guests was changed, >> nothing else on the host was changed). >> > KVM-72 is too old for recent qemu-kvm userspace. Unfortunately our > backwards compatibility does not go so far. KVM modules and what-not were upgraded at the same time, obviously (kvm, kvm-source, qemu-kvm packages). :) Taken from lenny-backports repo. Adding -no-kvm-irqchip to the command-line allows the VMs to start with -smp >1. Just don't know why that's needed, or what that does, as it's not listed in any changelogs that I can see, nor in the kvm/qemu man pages, nor anywhere on the linux-kvm.org website, nor anywhere on the qemu website, nor anywhere else I can find. In fact, the only mention of it is in the "kvm --help" output, and that 1 line of output is pretty much useless for understanding what it does. After 2 hours of creative googling, mailing list archives browsing, and searching through various bug trackers, I still have no idea why that's needed or what it does or what the implications are for its use. -- Freddie Cash fjwcash@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
