Vasiliy Tolstov
2014-Mar-11 12:25 UTC
[libvirt-users] kernel panic when using root from virtfs
I have strange kernel panic
Kernel 3.13.3 vanilla
root is mounted via 9p virtfs (readonly).
virsh --version
1.2.1
qemu --version
QEMU emulator version 1.7.0, Copyright (c) 2003-2008 Fabrice Bellard
systemd version 210
Domain config:
<domain type='kvm'>
<name>build</name>
<uuid>328891df-b3c3-aee9-eb5d-00007e7934f7</uuid>
<memory unit='MiB'>512</memory>
<currentMemory unit='MiB'>512</currentMemory>
<vcpu placement='static'>2</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-1.0'>hvm</type>
<boot dev='hd'/>
<kernel>/boot/vmlinuz-3.13.3</kernel>
<initrd>/boot/initrd-3.13.3</initrd>
<cmdline>ro root=virtfs:root console=tty0 console=ttyS0,115200n8
</cmdline>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>destroy</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<filesystem type='mount' accessmode='squash'>
<driver type='path' wrpolicy='immediate'/>
<source dir='/home/vtolstov/devel/vtolstov/lb/fs/x86_64'/>
<target dir='root'/>
<readonly/>
</filesystem>
<filesystem type='mount' accessmode='squash'>
<driver type='path' wrpolicy='immediate'/>
<source dir='/home/vtolstov/devel/vtolstov/lb/fs/var/log'/>
<target dir='var/log'/>
</filesystem>
<filesystem type='mount' accessmode='squash'>
<driver type='path' wrpolicy='immediate'/>
<source
dir='/home/vtolstov/devel/vtolstov/lb/fs/var/cache/paludis'/>
<target dir='var/cache/paludis'/>
</filesystem>
<filesystem type='mount' accessmode='squash'>
<driver type='path' wrpolicy='immediate'/>
<source
dir='/home/vtolstov/devel/vtolstov/lb/fs/var/db/paludis'/>
<target dir='var/db/paludis'/>
</filesystem>
<controller type='virtio-serial' index='0'>
<alias name='virtio-serial0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x0'/>
</controller>
<controller type='pci' index='0'
model='pci-root'>
<alias name='pci0'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x01'
function='0x1'/>
</controller>
<interface type='network'>
<mac address='52:54:00:00:02:4c'/>
<source network='mighost'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/8'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/8'>
<source path='/dev/pts/8'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<channel type='spicevmc'>
<target type='virtio' name='com.redhat.spice.0'/>
<alias name='channel0'/>
<address type='virtio-serial' controller='0'
bus='0' port='1'/>
</channel>
<channel type='unix'>
<source mode='bind'
path='/var/lib/libvirt/qemu/build.agent'/>
<target type='virtio' name='org.mighost.agent.0'/>
<alias name='channel1'/>
<address type='virtio-serial' controller='0'
bus='0' port='2'/>
</channel>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5905' autoport='yes'
listen='0.0.0.0'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<video>
<model type='vga' vram='9216' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x0'/>
</memballoon>
</devices>
<seclabel type='none'/>
</domain>
Sometimes i get error like:
[ OK ] Reached target Initrd File Systems.
Starting dracut mount hook...
[ 14.326081] FDC 0 is a S82078B
[ 14.644148] PANIC: double fault, error_code: 0x0
[ 14.640174] PANIC: double fault, error_code: 0x0
[ 14.640174] CPU: 0 PID: 130 Comm: systemd-udevd Not tainted 3.13.3 #2
[ 14.640174] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.640174] task: ffff88001faf0000 ti: ffff88001faee000 task.ti:
ffff88001faee000
[ 14.640174] RIP: 0010:[<ffffffff81109df8>] [<ffffffff81109df8>]
file_read_actor+0x58/0x160
[ 14.640174] RSP: 0018:ffff88001faefd60 EFLAGS: 00010206
[ 14.640174] RAX: 0000000000000000 RBX: ffff88001faefe10 RCX: 000000000000100f
[ 14.640174] RDX: 0000000000000000 RSI: ffffea000070ebc0 RDI: 00007f94d60b3037
[ 14.640174] RBP: ffff88001faefd90 R08: 0000000000000002 R09: ffffea000070ebdc
[ 14.640174] R10: 0000000000000023 R11: 0000000000000000 R12: 0000000000001000
[ 14.640174] R13: 000000000001f000 R14: ffff88001f9d5e00 R15: 0000000000001000
[ 14.640174] FS: 00007f94d60dc7c0(0000) GS:ffff88001f400000(0000)
knlGS:0000000000000000
[ 14.640174] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.640174] CR2: 0000000000000000 CR3: 000000001fad9000 CR4: 00000000000006f0
[ 14.640174] Stack:
[ 14.640174] ffff88001faefd70 ffff88001e025280 0000000000000021
0000000000001000
[ 14.640174] ffff88001f9d5e00 ffffea000070ebc0 ffff88001faefe58
ffffffff8110a1ca
[ 14.640174] ffff88001f9d5e10 ffff88001faefe90 ffff88001faefea0
0000000000000000
[ 14.640174] Call Trace:
[ 14.640174] [<ffffffff8110a1ca>] generic_file_aio_read+0x2ca/0x700
[ 14.640174] [<ffffffff811a11f6>] blkdev_aio_read+0x46/0x70
[ 14.640174] [<ffffffff8116c355>] do_sync_read+0x55/0x90
[ 14.640174] [<ffffffff8116c9e0>] vfs_read+0x90/0x160
[ 14.640174] [<ffffffff8116d4e4>] SyS_read+0x44/0xa0
[ 14.640174] [<ffffffff816ab07d>] system_call_fastpath+0x1a/0x1f
[ 14.640174] Code: 38 31 c0 66 66 90 c6 01 00 66 66 90 85 c0 0f 85
bf 00 00 00 49 63 fc 48 8d 7c 39 ff 48 31 f9 48 f7 c1 00 f0 ff ff 74
11 66 66 90 <c6> 07 00 66 66 90 85 c0 0f 85 c6 00 00 00 65 ff 04 25 e0
c7 00
[ 14.640174] Kernel panic - not syncing: Machine halted.
[ 14.644148] CPU: 1 PID: 126 Comm: systemd-udevd Not tainted 3.13.3 #2
[ 14.644148] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 14.644148] task: ffff88001fa42f80 ti: ffff88001fa84000 task.ti:
ffff88001fa84000
[ 14.644148] RIP: 0010:[<ffffffff81109df8>] [<ffffffff81109df8>]
file_read_actor+0x58/0x160
[ 14.644148] RSP: 0018:ffff88001fa85d60 EFLAGS: 00010206
[ 14.644148] RAX: 0000000000000000 RBX: ffff88001fa85e10 RCX: 000000000000100f
[ 14.644148] RDX: 0000000000000000 RSI: ffffea0000708340 RDI: 00007f94d60cb037
[ 14.644148] RBP: ffff88001fa85d90 R08: 0000000000000002 R09: ffffea000070835c
[ 14.644148] R10: 000000000000003b R11: 0000000000000001 R12: 0000000000001000
[ 14.644148] R13: 0000000000007000 R14: ffff88001f9d3900 R15: 0000000000001000
[ 14.640174] Shutting down cpus with NMI
[ 14.644148] FS: 00007f94d60dc7c0(0000) GS:ffff88001f500000(0000)
knlGS:0000000000000000
[ 14.644148] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 14.644148] CR2: 0000000000000000 CR3: 000000001fa67000 CR4: 00000000000006e0
[ 14.644148] Stack:
[ 14.644148] ffff88001fa85d70 ffff88001e2522c0 0000000000000039
0000000000001000
[ 14.644148] ffff88001f9d3900 ffffea0000708340 ffff88001fa85e58
ffffffff8110a1ca
[ 14.644148] ffff88001f9d3910 ffff88001fa85e90 ffff88001fa85ea0
0000000000000000
[ 14.644148] Call Trace:
[ 14.644148] [<ffffffff8110a1ca>] generic_file_aio_read+0x2ca/0x700
[ 14.644148] [<ffffffff811a11f6>] blkdev_aio_read+0x46/0x70
[ 14.644148] [<ffffffff8116c355>] do_sync_read+0x55/0x90
[ 14.644148] [<ffffffff8116c9e0>] vfs_read+0x90/0x160
[ 14.644148] [<ffffffff8116d4e4>] SyS_read+0x44/0xa0
[ 14.644148] [<ffffffff816ab07d>] system_call_fastpath+0x1a/0x1f
[ 14.644148] Code: 38 31 c0 66 66 90 c6 01 00 66 66 90 85 c0 0f 85
bf 00 00 00 49 63 fc 48 8d 7c 39 ff 48 31 f9 48 f7 c1 00 f0 ff ff 74
11 66 66 90 <c6> 07 00 66 66 90 85 c0 0f 85 c6 00 00 00 65 ff 04 25 e0
c7 00
--
Vasiliy Tolstov,
e-mail: v.tolstov@selfip.ru
jabber: vase@selfip.ru
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