Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
2014-03-07 1:59 GMT+04:00 Richard W.M. Jones rjo...@redhat.com: On Tue, Mar 04, 2014 at 09:13:40AM +0100, Paolo Bonzini wrote: Il 04/03/2014 03:40, Ian Pilcher ha scritto: Is this a known problem? I just tried using nested vmx for the first time since upgrading my system from F19 (3.12.?? at the time) to F20, and I cannot start any L2 guests. The L2 guest appears to hang almost immediately after starting, consuming 100% of one of the L1 guest's VCPUs. If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not occur. Any known workaround? (Other than using 3.12.10?) There is a fix on the way to the 3.13 kernel. You can open a Fedora bug and ask them to include http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the kernel. Thanks for fixing this. It affects a lot of libguestfs users too. I opened this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1073663 Rich. If i use 3.13.6 kernel that have alredy this patch, but sometimes i get kernel panic, what can i do? P.S. I'm using nested virt, fault from L2 [ 10.942007] PANIC: double fault, error_code: 0x0 [ 10.942007] CPU: 0 PID: 182 Comm: systemd-journal Not tainted 3.13.6 #3 [ 10.942007] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 10.942007] task: 88001cc08000 ti: 88001d70e000 task.ti: 88001d70e000 [ 10.942007] RIP: 0033:[7fe61b2fce8a] [7fe61b2fce8a] 0x7fe61b2fce8a [ 10.942007] RSP: 002b:7fffee7468d8 EFLAGS: 00010286 [ 10.942007] RAX: RBX: 0043344e RCX: 00430a70 [ 10.942007] RDX: 0010 RSI: RDI: 00430a70 [ 10.942007] RBP: 7fffee747130 R08: 0003 R09: 7fe61be81780 [ 10.942007] R10: R11: 0246 R12: 0001 [ 10.942007] R13: 01c9c380 R14: 0003 R15: 7fffee747148 [ 10.942007] FS: 7fe61be81780() GS:88001f80() knlGS: [ 10.942007] CS: 0010 DS: ES: CR0: 80050033 [ 10.942007] CR2: CR3: 1e1a2000 CR4: 06f0 [ 10.942007] [ 10.942007] Kernel panic - not syncing: Machine halted. -- Vasiliy Tolstov, e-mail: v.tols...@selfip.ru jabber: v...@selfip.ru -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On Fri, Mar 14, 2014 at 03:52:03PM +0400, Vasiliy Tolstov wrote: If i use 3.13.6 kernel that have alredy this patch, but sometimes i get kernel panic, what can i do? P.S. I'm using nested virt, fault from L2 It could be there is another, less frequent, bug in nested KVM. I'm assuming this is on Intel hardware? From the libguestfs point of view what you can do is to force TCG: export LIBGUESTFS_BACKEND_SETTINGS=force_tcg Unfortunately this only has an effect in libguestfs = 1.25.24. We're going to have the new version in Fedora 20 real soon -- probably before the end of this month. Or you can compile the Rawhide version on F20. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://people.redhat.com/~rjones/virt-df/ -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
2014-03-14 15:58 GMT+04:00 Richard W.M. Jones rjo...@redhat.com: It could be there is another, less frequent, bug in nested KVM. I'm assuming this is on Intel hardware? From the libguestfs point of view what you can do is to force TCG: export LIBGUESTFS_BACKEND_SETTINGS=force_tcg Unfortunately this only has an effect in libguestfs = 1.25.24. We're going to have the new version in Fedora 20 real soon -- probably before the end of this month. Or you can compile the Rawhide version on F20. Thanks for answer. I'm not using libguestfs. I'm try tun vm inside vm via libvirt. is that possible to debug this issue ? How can i help? P.S. Yes i'm using intel hardware. -- Vasiliy Tolstov, e-mail: v.tols...@selfip.ru jabber: v...@selfip.ru -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On Fri, Mar 14, 2014 at 04:11:13PM +0400, Vasiliy Tolstov wrote: 2014-03-14 15:58 GMT+04:00 Richard W.M. Jones rjo...@redhat.com: It could be there is another, less frequent, bug in nested KVM. I'm assuming this is on Intel hardware? From the libguestfs point of view what you can do is to force TCG: export LIBGUESTFS_BACKEND_SETTINGS=force_tcg Unfortunately this only has an effect in libguestfs = 1.25.24. We're going to have the new version in Fedora 20 real soon -- probably before the end of this month. Or you can compile the Rawhide version on F20. Thanks for answer. I'm not using libguestfs. I'm try tun vm inside vm via libvirt. You can set the VM domain type=qemu. Of course it'll run quite slowly. is that possible to debug this issue ? How can i help? Complete logs from the guest. Any messages from qemu or the host. put all of that into a full bug report. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
2014-03-14 16:16 GMT+04:00 Richard W.M. Jones rjo...@redhat.com: You can set the VM domain type=qemu. Of course it'll run quite slowly. is that possible to debug this issue ? How can i help? Complete logs from the guest. Any messages from qemu or the host. put all of that into a full bug report. Where i can find submission form for bug report? (I'm using exherbo linux, but it does not have like debian or sles personal patches and using only upstream) -- Vasiliy Tolstov, e-mail: v.tols...@selfip.ru jabber: v...@selfip.ru -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On Fri, Mar 14, 2014 at 04:39:48PM +0400, Vasiliy Tolstov wrote: 2014-03-14 16:16 GMT+04:00 Richard W.M. Jones rjo...@redhat.com: You can set the VM domain type=qemu. Of course it'll run quite slowly. is that possible to debug this issue ? How can i help? Complete logs from the guest. Any messages from qemu or the host. put all of that into a full bug report. Where i can find submission form for bug report? (I'm using exherbo linux, but it does not have like debian or sles personal patches and using only upstream) I suspect this is going to be a kernel bug, in which case: https://bugzilla.kernel.org/ For libvirt bugs it would be: https://bugzilla.redhat.com/enter_bug.cgi?component=libvirtproduct=Virtualization+Tools Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On Tue, Mar 04, 2014 at 09:13:40AM +0100, Paolo Bonzini wrote: Il 04/03/2014 03:40, Ian Pilcher ha scritto: Is this a known problem? I just tried using nested vmx for the first time since upgrading my system from F19 (3.12.?? at the time) to F20, and I cannot start any L2 guests. The L2 guest appears to hang almost immediately after starting, consuming 100% of one of the L1 guest's VCPUs. If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not occur. Any known workaround? (Other than using 3.12.10?) There is a fix on the way to the 3.13 kernel. You can open a Fedora bug and ask them to include http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the kernel. Thanks for fixing this. It affects a lot of libguestfs users too. I opened this bug: https://bugzilla.redhat.com/show_bug.cgi?id=1073663 Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
Il 04/03/2014 03:40, Ian Pilcher ha scritto: Is this a known problem? I just tried using nested vmx for the first time since upgrading my system from F19 (3.12.?? at the time) to F20, and I cannot start any L2 guests. The L2 guest appears to hang almost immediately after starting, consuming 100% of one of the L1 guest's VCPUs. If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not occur. Any known workaround? (Other than using 3.12.10?) There is a fix on the way to the 3.13 kernel. You can open a Fedora bug and ask them to include http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the kernel. Paolo -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On Tue, Mar 04, 2014 at 09:13:40AM +0100, Paolo Bonzini wrote: Il 04/03/2014 03:40, Ian Pilcher ha scritto: Is this a known problem? I just tried using nested vmx for the first time since upgrading my system from F19 (3.12.?? at the time) to F20, and I cannot start any L2 guests. The L2 guest appears to hang almost immediately after starting, consuming 100% of one of the L1 guest's VCPUs. If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not occur. Any known workaround? (Other than using 3.12.10?) If you want to try, I made a Fedora Kernel scratch build (i.e. not official) with fix Paolo pointed to below and this works for me: http://koji.fedoraproject.org/koji/taskinfo?taskID=6577700 (NOTE: Fedora Scratch build URLs won't last more than 10 days or so) There is a fix on the way to the 3.13 kernel. You can open a Fedora bug and ask them to include http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the kernel. Paolo -- 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 -- /kashyap -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On Tue, Mar 04, 2014 at 03:00:22PM +0530, Kashyap Chamarthy wrote: On Tue, Mar 04, 2014 at 09:13:40AM +0100, Paolo Bonzini wrote: Il 04/03/2014 03:40, Ian Pilcher ha scritto: Is this a known problem? I just tried using nested vmx for the first time since upgrading my system from F19 (3.12.?? at the time) to F20, and I cannot start any L2 guests. The L2 guest appears to hang almost immediately after starting, consuming 100% of one of the L1 guest's VCPUs. If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not occur. Err, I missed to read this. Sorry about that. Any known workaround? (Other than using 3.12.10?) If you want to try, I made a Fedora Kernel scratch build (i.e. not official) with fix Paolo pointed to below and this works for me: http://koji.fedoraproject.org/koji/taskinfo?taskID=6577700 (NOTE: Fedora Scratch build URLs won't last more than 10 days or so) There is a fix on the way to the 3.13 kernel. You can open a Fedora bug and ask them to include http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the kernel. Paolo -- 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 -- /kashyap -- /kashyap -- 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
Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
On 03/04/2014 03:30 AM, Kashyap Chamarthy wrote: If you want to try, I made a Fedora Kernel scratch build (i.e. not official) with fix Paolo pointed to below and this works for me: http://koji.fedoraproject.org/koji/taskinfo?taskID=6577700 Works here. Thanks! -- Ian Pilcher arequip...@gmail.com Sent from the cloud -- where it's already tomorrow -- 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
