[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-15 Thread ChristianEhrhardt
I backported this and tried my tests again, but this alone isn't sufficient to get the T->X->T working (which is effectively 2.0->2.5->2.0). Wily (2.4) is already out of service, so setting this to won't fix. Thanks for your guidance, but that now properly known I'll set the Xenial task to won't

[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-15 Thread ChristianEhrhardt
Serge, Paulo - thank you both! I already had the patch but I think it was good to discuss and list the expected behavior not only for me, but for whoever else that comes by this or a similar case. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed

[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-14 Thread Paolo Bonzini
> Especially I found that the "created on Trusty, migrated to xenial > (works), but later migrated back to trusty (fails)" seems affected by > it as well. The first migration of the t->x->t sequence does not really matter (if anything it could introduce _more_ bugs!), so if x->t is not supported t

Re: [Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-14 Thread Serge Hallyn
You might ask on #virt for the opinion there, but I don't believe migrating backward is supported in any case. t->x->t doesn't change the fact that there is x->t. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.

[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-14 Thread ChristianEhrhardt
Hi Serge I agree to "created on xenial -> migrating to trusty" not being supported. I already tended to even say "created on xenial with the Trusty machine type -> migrating to trusty" is not supported as well (at least it is failing for all combos I tried. But I wonder how far "anything moving

Re: [Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-14 Thread Serge Hallyn
Migrating a VM from xenial -> trusty (or anything moving backward) is not supported. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1536487 Title: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU

[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-14 Thread ChristianEhrhardt
** Also affects: qemu (Ubuntu Xenial) Importance: Undecided Status: New ** Changed in: qemu (Ubuntu Xenial) Status: New => Triaged ** Changed in: qemu (Ubuntu Xenial) Importance: Undecided => High ** Changed in: qemu (Ubuntu) Status: Triaged => Fix Released -- You re

[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-07 Thread ChristianEhrhardt
** Changed in: qemu (Ubuntu) Status: New => Triaged ** Changed in: qemu (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1536487 Title: Unable to migra

[Bug 1536487] Re: Unable to migrate pc-i440fx-2.4 KVM guest from QEMU 2.5.0 to QEMU 2.4.1

2016-09-07 Thread ChristianEhrhardt
Note: Also affects Migration Xenial->Trusty (tested and ran into the same issue, that was how I found the bug) and very likely also Yakkety->Trusty. qemu | 2.0.0+dfsg-2ubuntu1.27 | trusty-security | source qemu | 1:2.5+dfsg-5ubuntu10.4 | xenial-updates| source Subscrib