Re: Hot-adding disk on VM
Hi, Dustin. On Saturday, 07 November 2009 21:15:09 -0600, Dustin Kirkland wrote: On Sat, Nov 7, 2009 at 7:01 PM, Daniel Bareiro daniel-lis...@gmx.net wrote: According to I see in Launchpad, there is a fix released for Qemu and qemu-kvm (Ubuntu). It's fix committed in QEMU, and Fix Released in Ubuntu's qemu-kvm. We in Ubuntu have released version of qemu-kvm-0.11.0 that includes an extra patch from Anthony, which he posted on the mailing list, and committed to QEMU's git tree. He hasn't officially released an upstream QEMU with the fix yet, though. I'm using KVM-88 compiled from the source code obtained of the KVM official site. How I could apply these fix? There is some KVM version that includes these corrections in the official site? Not that I know of, yet. You can pull the patch [1] we're carrying in Ubuntu, and apply it to qemu-kvm-0.11.0 [2] from the kvm website, if you like. [1] http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/karmic/qemu-kvm/karmic/annotate/head%3A/debian/patches/11_fix_virtio-blk_hot_add_after_remove.patch [2] http://sourceforge.net/projects/kvm/files/ I've tested again with Linux 2.6.32 and qemu-kvm-0.12.0-rc2 and this time I could verify that no longer happens the problem with Virtio. That is to say, the virtual disk can be added and be removed every time without problems. It drew attention to me that whenever I add the virtio device, this appears with a different name (vdc, vdd, vde, etc). This it is the awaited behavior? Testing the same with if=scsi, I get a tainted again when removing the virtual disk since the first time that I try to remove it. Nevertheless, no longer it seems to have problem to add it again. Thanks for your reply. Merry Christmas. Regards, Daniel -- Fingerprint: BFB3 08D6 B4D1 31B2 72B9 29CE 6696 BF1B 14E6 1D37 Powered by Debian GNU/Linux Lenny - Linux user #188.598 signature.asc Description: Digital signature
Re: Hot-adding disk on VM
Hi, Dustin. On Sunday, 11 October 2009 21:25:19 -0500, Dustin Kirkland wrote: According to I see in this document [1], is necessary that is loaded two modules in the guest: acpiphp and pci_hotplug. The pci_hotplug module is loaded. Nevertheless, in spite of existing the acpiphp module, cannot be loaded: chandra:~# lsmod|grep pci_hotplug pci_hotplug 23460 0 chandra:~# modprobe acpiphp FATAL: Error inserting acpiphp (/lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko): No such device chandra:~# locate acpiphp | grep 686 /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp_ibm.ko Which could be being the problem? I was doing other tests this time with Linux 2.6.31.2 compiled by myself from the sources of kernel.org. This time with loading the acpiphp module, the pci_hotplug module was loaded automatically without I get some type of error message. central:~# lsmod | grep acpiphp central:~# central:~# modprobe acpiphp central:~# central:~# lsmod | grep acpiphp acpiphp 22140 0 pci_hotplug 29024 1 acpiphp Then, I tried to add a disk of the following way in host: (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio OK domain 0, bus 0, slot 5, function 0 In the guest: Oct 11 18:09:01 central kernel: [ 833.403875] pci :00:02.0: BAR 6: bogus alignment [0x0-0x0] flags 0x2 Oct 11 18:09:01 central kernel: [ 833.406337] decode_hpp: Could not get hotplug parameters. Use defaults Oct 11 18:09:01 central kernel: [ 833.430492] virtio-pci :00:05.0: enabling device ( - 0001) Oct 11 18:09:01 central kernel: [ 833.452268] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10 Oct 11 18:09:01 central kernel: [ 833.454668] virtio-pci :00:05.0: PCI INT A - Link[LNKA] - GSI 10 (level, high) - IRQ 10 Oct 11 18:09:01 central kernel: [ 833.500051] Clocksource tsc unstable (delta = -148257950 ns) Oct 11 18:09:01 central kernel: [ 833.566755] vda: vda1 Then I attempt to remove the device assuring previously that it is not being used in guest: (qemu) pci_del 5 In the guest: Oct 11 18:13:32 central kernel: [ 1104.144179] virtio-pci :00:05.0: PCI INT A disabled But if I want to add the device again, I get a segmentation fault of the process that handles this virtual machine: (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio Connection closed by foreign host. I can actually confirm this behavior. I've been struggling with this for a couple of days now. CC'ing QEMU, as I've discussed this a bit with Anthony Liguori. There's at least two related bugs we've been tracking: * https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/432154 * https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/419590 According to I see in Launchpad, there is a fix released for Qemu and qemu-kvm (Ubuntu). I'm using KVM-88 compiled from the source code obtained of the KVM official site. How I could apply these fix? There is some KVM version that includes these corrections in the official site? Thanks for your reply. Regards, Daniel -- Fingerprint: BFB3 08D6 B4D1 31B2 72B9 29CE 6696 BF1B 14E6 1D37 Powered by Debian GNU/Linux Squeeze - Linux user #188.598 signature.asc Description: Digital signature
Re: Hot-adding disk on VM
On Sat, Nov 7, 2009 at 7:01 PM, Daniel Bareiro daniel-lis...@gmx.net wrote: According to I see in Launchpad, there is a fix released for Qemu and qemu-kvm (Ubuntu). It's fix committed in QEMU, and Fix Released in Ubuntu's qemu-kvm. We in Ubuntu have released version of qemu-kvm-0.11.0 that includes an extra patch from Anthony, which he posted on the mailing list, and committed to QEMU's git tree. He hasn't officially released an upstream QEMU with the fix yet, though. I'm using KVM-88 compiled from the source code obtained of the KVM official site. How I could apply these fix? There is some KVM version that includes these corrections in the official site? Not that I know of, yet. You can pull the patch [1] we're carrying in Ubuntu, and apply it to qemu-kvm-0.11.0 [2] from the kvm website, if you like. [1] http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/karmic/qemu-kvm/karmic/annotate/head%3A/debian/patches/11_fix_virtio-blk_hot_add_after_remove.patch [2] http://sourceforge.net/projects/kvm/files/ :-Dustin -- 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: Hot-adding disk on VM
Hi, all! On Saturday, 22 August 2009 10:59:47 -0300, Daniel Bareiro wrote: According to I see in this document [1], is necessary that is loaded two modules in the guest: acpiphp and pci_hotplug. The pci_hotplug module is loaded. Nevertheless, in spite of existing the acpiphp module, cannot be loaded: chandra:~# lsmod|grep pci_hotplug pci_hotplug23460 0 chandra:~# modprobe acpiphp FATAL: Error inserting acpiphp (/lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko): No such device chandra:~# locate acpiphp | grep 686 /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp_ibm.ko Which could be being the problem? I was doing other tests this time with Linux 2.6.31.2 compiled by myself from the sources of kernel.org. This time with loading the acpiphp module, the pci_hotplug module was loaded automatically without I get some type of error message. central:~# lsmod | grep acpiphp central:~# central:~# modprobe acpiphp central:~# central:~# lsmod | grep acpiphp acpiphp22140 0 pci_hotplug29024 1 acpiphp Then, I tried to add a disk of the following way in host: (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio OK domain 0, bus 0, slot 5, function 0 In the guest: Oct 11 18:09:01 central kernel: [ 833.403875] pci :00:02.0: BAR 6: bogus alignment [0x0-0x0] flags 0x2 Oct 11 18:09:01 central kernel: [ 833.406337] decode_hpp: Could not get hotplug parameters. Use defaults Oct 11 18:09:01 central kernel: [ 833.430492] virtio-pci :00:05.0: enabling device ( - 0001) Oct 11 18:09:01 central kernel: [ 833.452268] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10 Oct 11 18:09:01 central kernel: [ 833.454668] virtio-pci :00:05.0: PCI INT A - Link[LNKA] - GSI 10 (level, high) - IRQ 10 Oct 11 18:09:01 central kernel: [ 833.500051] Clocksource tsc unstable (delta = -148257950 ns) Oct 11 18:09:01 central kernel: [ 833.566755] vda: vda1 Then I attempt to remove the device assuring previously that it is not being used in guest: (qemu) pci_del 5 In the guest: Oct 11 18:13:32 central kernel: [ 1104.144179] virtio-pci :00:05.0: PCI INT A disabled But if I want to add the device again, I get a segmentation fault of the process that handles this virtual machine: (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio Connection closed by foreign host. r...@ubuntu:~# tail -f /var/log/messages [...] Oct 11 18:21:29 ubuntu kernel: [692002.207026] qemu-system-x86[3481]: segfault at 8d0 ip 0041a183 sp 7fff848ef9f0 error 6 in qemu-system-x86_64[40+219000] Oct 11 18:21:29 ubuntu kernel: [692002.291714] br0: port 4(tap2) entering disabled state Oct 11 18:21:29 ubuntu kernel: [692002.330875] br0: port 4(tap2) entering disabled state Also I was testing using if=scsi and when I trying to remove the device, can be seen a 'tainted' in guest. In host: (qemu) pci_add auto storage file=/dev/vm/central-test,if=scsi In guest: Oct 11 18:35:51 central kernel: [ 199.375026] pci :00:02.0: BAR 6: bogus alignment [0x0-0x0] flags 0x2 Oct 11 18:35:51 central kernel: [ 199.377801] decode_hpp: Could not get hotplug parameters. Use defaults Oct 11 18:35:51 central kernel: [ 199.484410] sym53c8xx :00:05.0: enabling device ( - 0003) Oct 11 18:35:51 central kernel: [ 199.495739] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10 Oct 11 18:35:51 central kernel: [ 199.498165] sym53c8xx :00:05.0: PCI INT A - Link[LNKA] - GSI 10 (level, high) - IRQ 10 Oct 11 18:35:51 central kernel: [ 199.503886] sym0: 895a rev 0x0 at pci :00:05.0 irq 10 Oct 11 18:35:51 central kernel: [ 199.508711] sym0: No NVRAM, ID 7, Fast-40, LVD, parity checking Oct 11 18:35:51 central kernel: [ 199.512023] sym0: SCSI BUS has been reset. Oct 11 18:35:51 central kernel: [ 199.530575] scsi2 : sym-2.2.3 Oct 11 18:35:54 central kernel: [ 202.512229] scsi 2:0:0:0: Direct-Access QEMU QEMU HARDDISK0.10 PQ: 0 ANSI: 3 Oct 11 18:35:54 central kernel: [ 202.515687] target2:0:0: tagged command queuing enabled, command queue depth 16. Oct 11 18:35:54 central kernel: [ 202.519013] target2:0:0: Beginning Domain Validation Oct 11 18:35:54 central kernel: [ 202.521737] target2:0:0: Domain Validation skipping write tests Oct 11 18:35:54 central kernel: [ 202.524167] target2:0:0: Ending Domain Validation Oct 11 18:35:54 central kernel: [ 202.530816] sd 2:0:0:0: Attached scsi generic sg3 type 0 Oct 11 18:35:54 central kernel: [ 202.533321] sd 2:0:0:0: [sdc] 10485760 512-byte logical blocks: (5.36 GB/5.00 GiB) Oct 11 18:35:54 central kernel: [ 202.536661] sd 2:0:0:0: [sdc] Write Protect is off Oct 11 18:35:54 central kernel: [ 202.538825] sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA Oct 11 18:35:54 central kernel: [ 202.543108] sdc: sdc1 Oct 11 18:35:54 central
Re: Hot-adding disk on VM
On Sun, Oct 11, 2009 at 4:51 PM, Daniel Bareiro daniel-lis...@gmx.net wrote: Hi, all! On Saturday, 22 August 2009 10:59:47 -0300, Daniel Bareiro wrote: According to I see in this document [1], is necessary that is loaded two modules in the guest: acpiphp and pci_hotplug. The pci_hotplug module is loaded. Nevertheless, in spite of existing the acpiphp module, cannot be loaded: chandra:~# lsmod|grep pci_hotplug pci_hotplug 23460 0 chandra:~# modprobe acpiphp FATAL: Error inserting acpiphp (/lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko): No such device chandra:~# locate acpiphp | grep 686 /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp.ko /lib/modules/2.6.26-2-686/kernel/drivers/pci/hotplug/acpiphp_ibm.ko Which could be being the problem? I was doing other tests this time with Linux 2.6.31.2 compiled by myself from the sources of kernel.org. This time with loading the acpiphp module, the pci_hotplug module was loaded automatically without I get some type of error message. central:~# lsmod | grep acpiphp central:~# central:~# modprobe acpiphp central:~# central:~# lsmod | grep acpiphp acpiphp 22140 0 pci_hotplug 29024 1 acpiphp Then, I tried to add a disk of the following way in host: (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio OK domain 0, bus 0, slot 5, function 0 In the guest: Oct 11 18:09:01 central kernel: [ 833.403875] pci :00:02.0: BAR 6: bogus alignment [0x0-0x0] flags 0x2 Oct 11 18:09:01 central kernel: [ 833.406337] decode_hpp: Could not get hotplug parameters. Use defaults Oct 11 18:09:01 central kernel: [ 833.430492] virtio-pci :00:05.0: enabling device ( - 0001) Oct 11 18:09:01 central kernel: [ 833.452268] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10 Oct 11 18:09:01 central kernel: [ 833.454668] virtio-pci :00:05.0: PCI INT A - Link[LNKA] - GSI 10 (level, high) - IRQ 10 Oct 11 18:09:01 central kernel: [ 833.500051] Clocksource tsc unstable (delta = -148257950 ns) Oct 11 18:09:01 central kernel: [ 833.566755] vda: vda1 Then I attempt to remove the device assuring previously that it is not being used in guest: (qemu) pci_del 5 In the guest: Oct 11 18:13:32 central kernel: [ 1104.144179] virtio-pci :00:05.0: PCI INT A disabled But if I want to add the device again, I get a segmentation fault of the process that handles this virtual machine: (qemu) pci_add auto storage file=/dev/vm/central-test,if=virtio Connection closed by foreign host. I can actually confirm this behavior. I've been struggling with this for a couple of days now. CC'ing QEMU, as I've discussed this a bit with Anthony Liguori. There's at least two related bugs we've been tracking: * https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/432154 * https://bugs.edge.launchpad.net/ubuntu/+source/qemu-kvm/+bug/419590 :-Dustin -- 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
