[Libguestfs] Libguestfs hangs after issuing a launch command

yeswanth swami swamiyeswanth at gmail.com
Thu Jul 21 20:47:33 UTC 2011 

I should emphasize that I am launching the disk only after the VM is
stopped. i.e VM is not operational when libguestfs is being used.

On Fri, Jul 22, 2011 at 2:15 AM, yeswanth swami <swamiyeswanth at gmail.com>wrote:

> Hi,
> I am using libguestfs 1.12.0 and I am facing a problem with it .
> I am using guestfs python bindings to "launch" a vdi image file .
> It works fine except immediately after a VM is stopped(which uses the same
> vdi file)
> i.e in normal conditions launch command  works but when a vm (which uses
> the same vdi file) is started - stopped , a call to "launch" command hangs
> the terminal. Please help .
> this is the output of the libguestfs_debug :
>
> libguestfs: new guestfs handle 0x7f0e3007dee0
> libguestfs: trace: set_autosync true
> libguestfs: trace: set_autosync = 0
> libguestfs: trace: launch
> libguestfs: [00000ms] febootstrap-supermin-helper --verbose -f checksum
> '/usr/lib/guestfs/supermin.d' x86_64
> supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64,
> kernel = (null), initrd = (null), appliance = (null)
> supermin helper [00000ms] inputs[0] = /usr/lib/guestfs/supermin.d
> checking modpath /lib/modules/2.6.38-8-generic is a directory
> picked vmlinuz-2.6.38-8-generic because modpath
> /lib/modules/2.6.38-8-generic exists
> supermin helper [00000ms] finished creating kernel
> supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d
> supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d/base.img
> supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d/daemon.img
> supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d/hostfiles
> supermin helper [00024ms] visiting /usr/lib/guestfs/supermin.d/init.img
> supermin helper [00125ms] finished creating appliance
> libguestfs: [00129ms] begin testing qemu features
> libguestfs: [00144ms] finished testing qemu features
> libguestfs: is_openable: /dev/kvm: No such file or directory
> libguestfs: accept_from_daemon: 0x7f0e3007dee0 g->state = 1
> libguestfs: [00146ms] /usr/bin/kvm \
>     -drive 'file=/home/yeswanth/VirtualBox
> VMs/damnit/damnit.vdi,cache=off,if=virtio' \
>     -nodefconfig \
>     -nodefaults \
>     -nographic \
>     -m 500 \
>     -no-reboot \
>     -no-hpet \
>     -device virtio-serial \
>     -serial stdio \
>     -chardev socket,path=/tmp/libguestfszoC739/guestfsd.sock,id=channel0 \
>     -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
>     -kernel /var/tmp/.guestfs-1000/kernel.30876 \
>     -initrd /var/tmp/.guestfs-1000/initrd.30876 \
>     -append 'panic=1 console=ttyS0 udevtimeout=300 noapic acpi=off
> printk.time=1 cgroup_disable=memory selinux=0 guestfs_verbose=1 TERM=xterm '
> \
>     -drive
> file=/var/tmp/.guestfs-1000/root.30876,snapshot=on,if=virtio,cache=unsafe
> open /dev/kvm: No such file or directory
> Could not initialize KVM, will disable KVM support
> [    0.000000] Initializing cgroup subsys cpuset
> [    0.000000] Initializing cgroup subsys cpu
> [    0.000000] Linux version 2.6.38-8-generic (buildd at allspice) (gcc
> version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu3) ) #42-Ubuntu SMP Mon Apr 11
> 03:31:24 UTC 2011 (Ubuntu 2.6.38-8.42-generic 2.6.38.2)
> [    0.000000] Command line: panic=1 console=ttyS0 udevtimeout=300 noapic
> acpi=off printk.time=1 cgroup_disable=memory selinux=0 guestfs_verbose=1
> TERM=xterm
> [    0.000000] BIOS-provided physical RAM map:
> [    0.000000]  BIOS-e820: 0000000000000000 - 000000000009bc00 (usable)
> [    0.000000]  BIOS-e820: 000000000009bc00 - 00000000000a0000 (reserved)
> [    0.000000]  BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
> [    0.000000]  BIOS-e820: 0000000000100000 - 000000001f3fd000 (usable)
> [    0.000000]  BIOS-e820: 000000001f3fd000 - 000000001f400000 (reserved)
> [    0.000000]  BIOS-e820: 00000000fffc0000 - 0000000100000000 (reserved)
> [    0.000000] NX (Execute Disable) protection: active
> [    0.000000] DMI 2.4 present.
> [    0.000000] No AGP bridge found
> [    0.000000] last_pfn = 0x1f3fd max_arch_pfn = 0x400000000
> [    0.000000] x86 PAT enabled: cpu 0, old 0x0, new 0x7010600070106
> [    0.000000] found SMP MP-table at [ffff8800000fd790] fd790
> [    0.000000] init_memory_mapping: 0000000000000000-000000001f3fd000
> [    0.000000] RAMDISK: 1f2df000 - 1f3f0000
> [    0.000000] No NUMA configuration found
> [    0.000000] Faking a node at 0000000000000000-000000001f3fd000
> [    0.000000] Initmem setup node 0 0000000000000000-000000001f3fd000
> [    0.000000]   NODE_DATA [000000001f3f5000 - 000000001f3f9fff]
> [    0.000000] Zone PFN ranges:
> [    0.000000]   DMA      0x00000010 -> 0x00001000
> [    0.000000]   DMA32    0x00001000 -> 0x00100000
> [    0.000000]   Normal   empty
> [    0.000000] Movable zone start PFN for each node
> [    0.000000] early_node_map[2] active PFN ranges
> [    0.000000]     0: 0x00000010 -> 0x0000009b
> [    0.000000]     0: 0x00000100 -> 0x0001f3fd
> [    0.000000] SFI: Simple Firmware Interface v0.81
> http://simplefirmware.org
> [    0.000000] Intel MultiProcessor Specification v1.4
> [    0.000000] MPTABLE: OEM ID: BOCHSCPU
> [    0.000000] MPTABLE: Product ID: 0.1
> [    0.000000] MPTABLE: APIC at: 0xFEE00000
> [    0.000000] Processor #0 (Bootup-CPU)
> [    0.000000] IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI
> 0-23
> [    0.000000] Processors: 1
> [    0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs
> [    0.000000] PM: Registered nosave memory: 000000000009b000 -
> 000000000009c000
> [    0.000000] PM: Registered nosave memory: 000000000009c000 -
> 00000000000a0000
> [    0.000000] PM: Registered nosave memory: 00000000000a0000 -
> 00000000000f0000
> [    0.000000] PM: Registered nosave memory: 00000000000f0000 -
> 0000000000100000
> [    0.000000] Allocating PCI resources starting at 1f400000 (gap:
> 1f400000:e0bc0000)
> [    0.000000] Booting paravirtualized kernel on bare hardware
> [    0.000000] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:1
> nr_node_ids:1
> [    0.000000] PERCPU: Embedded 28 pages/cpu @ffff88001f000000 s84416 r8192
> d22080 u2097152
> [    0.000000] Built 1 zonelists in Node order, mobility grouping on.
>  Total pages: 126124
> [    0.000000] Policy zone: DMA32
> [    0.000000] Kernel command line: panic=1 console=ttyS0 udevtimeout=300
> noapic acpi=off printk.time=1 cgroup_disable=memory selinux=0
> guestfs_verbose=1 TERM=xterm
> [    0.000000] Disabling memory control group subsystem
> [    0.000000] PID hash table entries: 2048 (order: 2, 16384 bytes)
> [    0.000000] Checking aperture...
> [    0.000000] No AGP bridge found
> [    0.000000] Memory: 488716k/511988k available (5940k kernel code, 468k
> absent, 22804k reserved, 5017k data, 956k init)
> [    0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0,
> CPUs=1, Nodes=1
> [    0.000000] Hierarchical RCU implementation.
> [    0.000000] RCU dyntick-idle grace-period acceleration is enabled.
> [    0.000000] RCU-based detection of stalled CPUs is disabled.
> [    0.000000] NR_IRQS:16640 nr_irqs:256 16
> [    0.000000] Console: colour dummy device 80x25
> [    0.000000] console [ttyS0] enabled
> [    0.000000] Fast TSC calibration using PIT
> [    0.000000] Detected 2526.022 MHz processor.
> [    0.000472] Calibrating delay loop (skipped), value calculated using
> timer frequency.. 5052.04 BogoMIPS (lpj=25260220)
> [    0.001006] pid_max: default: 32768 minimum: 301
> [    0.001935] Security Framework initialized
> [    0.004110] AppArmor: AppArmor initialized
> [    0.004301] Yama: becoming mindful.
> [    0.008970] Dentry cache hash table entries: 65536 (order: 7, 524288
> bytes)
> [    0.010000] Inode-cache hash table entries: 32768 (order: 6, 262144
> bytes)
> [    0.010000] Mount-cache hash table entries: 256
> [    0.010000] Initializing cgroup subsys ns
> [    0.010000] ns_cgroup deprecated: consider using the 'clone_children'
> flag without the ns_cgroup.
> [    0.010000] Initializing cgroup subsys cpuacct
> [    0.010000] Initializing cgroup subsys memory
> [    0.010000] Initializing cgroup subsys devices
> [    0.010000] Initializing cgroup subsys freezer
> [    0.010000] Initializing cgroup subsys net_cls
> [    0.010000] Initializing cgroup subsys blkio
> [    0.010000] mce: CPU supports 10 MCE banks
> [    0.010000] SMP alternatives: switching to UP code
> [    0.010000] Freeing SMP alternatives: 20k freed
> [    0.010000] ftrace: allocating 24314 entries in 96 pages
> [    0.010000] Setting APIC routing to flat
> [    0.010000] CPU0: AMD QEMU Virtual CPU version 0.14.0 stepping 03
>
>
> The terminal hangs after this output .
> --
> Cheers,
> Yeswanth
>
>


-- 
Cheers,
Yeswanth
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