live attached disk cannot be found in the guest VM sometimes
Hi all, I got a issue when attach disk to a qemu-kvm guest(kernel version: Linux debian 3.2.0-3-amd64 #1 SMP Thu Jun 28 09:07:26 UTC 2012 x86_64 GNU/Linux) The steps are: 1. using libvirt API start a guest 2. 'ping' the IP address of the guest once each time 3. when 'ping' return OK, I attach a ISCSI LVM disk into the guest by libvirt API, and the disk appears in the guest this works successfully most of the time, BUT sometimes I cannot see the disk in the guest(by 'fdisk -l') evenif the libvirt API return OK and I can see the disk is in the XML configuration dumped by 'virsh dumpxml'. I check the syslog of the guest, and guess the reason may be that, the attach operation is before the kernel module loaded(pci_hotplug/acpiphp), so the attached disk doesn't appear in the guest. Is this right? Log messages: qemu log: 2012-10-08 09:47:31.753+: starting up(guest starts time, UTC should +8 to CST) libvirt API call log: 2012-10-08 17:47:36,931 INFO Attach volume 1449 into virtual machine device 11606f9e-98ee-4857-99ea-14a576037bfc begin... 2012-10-08 17:47:37,757 INFO Successfully attach volume 1449 into 11606f9e-98ee-4857-99ea-14a576037bfc, virtual machine device: /dev/ebs/xdey syslog: Oct 8 17:47:42 debian kernel: imklog 5.8.11, log source = /proc/kmsg started Any suggestion is welcome, thanks in advance. Wangpan -- 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: live attached disk cannot be found in the guest VM sometimes
Another thing should be concerned: when I attach another disk after a disk attached but cannot found in guest, the TWO disks all appear in guest! Oct 9 10:45:24 debian kernel: [61068.049509] pci :00:11.0: [1af4:1001] type 0 class 0x000100 Oct 9 10:45:24 debian kernel: [61068.049715] pci :00:11.0: reg 10: [io 0x-0x003f] Oct 9 10:45:24 debian kernel: [61068.049813] pci :00:11.0: reg 14: [mem 0x-0x0fff] Oct 9 10:45:24 debian kernel: [61068.051544] pci :00:11.0: BAR 1: assigned [mem 0xe000-0xefff] Oct 9 10:45:24 debian kernel: [61068.051584] pci :00:11.0: BAR 1: set to [mem 0xe000-0xefff] (PCI address [0xe000-0xefff]) Oct 9 10:45:24 debian kernel: [61068.051591] pci :00:11.0: BAR 0: assigned [io 0x1000-0x103f] Oct 9 10:45:24 debian kernel: [61068.051623] pci :00:11.0: BAR 0: set to [io 0x1000-0x103f] (PCI address [0x1000-0x103f]) Oct 9 10:45:24 debian kernel: [61068.051633] pci :00:00.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.051636] pci :00:00.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.051695] pci :00:01.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.051698] pci :00:01.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.051756] ata_piix :00:01.1: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.051759] ata_piix :00:01.1: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.051818] uhci_hcd :00:01.2: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.051820] uhci_hcd :00:01.2: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.051878] piix4_smbus :00:01.3: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.051880] piix4_smbus :00:01.3: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.051938] pci :00:02.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.051941] pci :00:02.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.052021] virtio-pci :00:03.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.052021] virtio-pci :00:03.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.052146] virtio-pci :00:04.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.052146] virtio-pci :00:04.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.052173] virtio-pci :00:05.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.052175] virtio-pci :00:05.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.052311] virtio-pci :00:06.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.052316] virtio-pci :00:06.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.052337] pci :00:11.0: no hotplug settings from platform Oct 9 10:45:24 debian kernel: [61068.052337] pci :00:11.0: using default PCI settings Oct 9 10:45:24 debian kernel: [61068.052939] virtio-pci :00:11.0: enabling device ( - 0003) the new attached disk// Oct 9 10:45:24 debian kernel: [61068.053982] virtio-pci :00:11.0: PCI INT A - Link[LNKA] - GSI 10 (level, high) - IRQ 10 Oct 9 10:45:24 debian kernel: [61068.054199] virtio-pci :00:11.0: setting latency timer to 64 Oct 9 10:45:24 debian kernel: [61068.054930] virtio-pci :00:11.0: irq 47 for MSI/MSI-X Oct 9 10:45:24 debian kernel: [61068.054964] virtio-pci :00:11.0: irq 48 for MSI/MSI-X Oct 9 10:45:25 debian kernel: [61068.219537] vdc: unknown partition table /the new attached disk/ Oct 9 10:45:25 debian kernel: [61068.221828] pci :00:10.0: [1af4:1001] type 0 class 0x000100 Oct 9 10:45:25 debian kernel: [61068.222047] pci :00:10.0: reg 10: [io 0x-0x003f] Oct 9 10:45:25 debian kernel: [61068.222145] pci :00:10.0: reg 14: [mem 0x-0x0fff] Oct 9 10:45:25 debian kernel: [61068.223162] pci :00:10.0: BAR 1: assigned [mem 0xe0001000-0xe0001fff] Oct 9 10:45:25 debian kernel: [61068.223223] pci :00:10.0: BAR 1: set to [mem 0xe0001000-0xe0001fff] (PCI address [0xe0001000-0xe0001fff]) Oct 9 10:45:25 debian kernel: [61068.223223] pci :00:10.0: BAR 0: assigned [io 0x1040-0x107f] Oct 9 10:45:25 debian kernel: [61068.223260] pci :00:10.0: BAR 0: set to [io 0x1040-0x107f] (PCI address [0x1040-0x107f]) Oct 9 10:45:25 debian kernel: [61068.223427] pci :00:00.0: no hotplug settings from platform Oct 9 10:45:25 debian kernel: [61068.223430] pci :00:00.0: using default PCI settings Oct 9 10:45:25 debian kernel: [61068.223495] pci :00:01.0: no hotplug settings from platform Oct 9 10:45:25 debian kernel: [61068.223497] pci :00:01.0: using default PCI settings Oct
