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From: virtualroot on 8 Dec 2009 14:50
Hello, we have Xen 3.1.2 installed on Debian 5.0.3 machine and the
domU runs CentOS release 5.3 with Cpanel

I am having this problem with this configuration in two servers,

DomU Kernel Panic CentOS:
[18318.039315] Call Trace:
[18318.039320] [<ffffffff8037d4e7>] notify_remote_via_irq+0x26/0x2b
[18318.039326] [<ffffffff8020e911>] xen_clocksource_read+0xd/0x9c
[18318.039333] [<ffffffff802646c1>] sync_page+0x0/0x41
[18318.039336] [<ffffffff80243f2e>] getnstimeofday+0x39/0x98
[18318.039341] [<ffffffff802646c1>] sync_page+0x0/0x41
[18318.039346] [<ffffffff80434a5f>] io_schedule+0x5c/0x9e
[18318.039350] [<ffffffff802646fd>] sync_page+0x3c/0x41
[18318.039355] [<ffffffff80434bd2>] __wait_on_bit_lock+0x36/0x66
[18318.039360] [<ffffffff802646ae>] __lock_page+0x5e/0x64
[18318.039364] [<ffffffff8023f6c7>] wake_bit_function+0x0/0x23
[18318.039369] [<ffffffff8026488f>] find_lock_page+0x79/0xc3
[18318.039374] [<ffffffff8026665c>] filemap_fault+0x72/0x346
[18318.039380] [<ffffffff80271969>] __do_fault+0x51/0x4f5
[18318.039387] [<ffffffff802766b4>] handle_mm_fault+0x5f8/0xc46
[18318.039393] [<ffffffff80218197>] do_page_fault+0xb69/0xf46
[18318.039398] [<ffffffff803115ef>] __up_write+0x21/0x10e
[18318.039403] [<ffffffff80436587>] error_exit+0x0/0x69
[18318.039409]
[18318.039417] INFO: task exim:22390 blocked for more than 120 seconds.
[18318.039421] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[18318.039428] ffff88000187fcb8 0000000000000286 ffff88007e3e58c0
ffff88007f81fbe0
[18318.039435] ffff88000187d680 ffff88007fe2d740 ffff88000187d900
000000028020e810
[18318.039442] ffff880000000005 0000000000006dae 000000000053b42a
ffff88000000000f
[18318.039448] Call Trace:
[18318.039454] [<ffffffff8020e911>] xen_clocksource_read+0xd/0x9c
[18318.039459] [<ffffffff802646c1>] sync_page+0x0/0x41
[18318.039463] [<ffffffff80243f2e>] getnstimeofday+0x39/0x98
[18318.039468] [<ffffffff802646c1>] sync_page+0x0/0x41
[18318.039472] [<ffffffff80434a5f>] io_schedule+0x5c/0x9e
[18318.039477] [<ffffffff802646fd>] sync_page+0x3c/0x41
[18318.039481] [<ffffffff80434bd2>] __wait_on_bit_lock+0x36/0x66
[18318.039487] [<ffffffff802646ae>] __lock_page+0x5e/0x64
[18318.039491] [<ffffffff8023f6c7>] wake_bit_function+0x0/0x23
[18318.039496] [<ffffffff8026488f>] find_lock_page+0x79/0xc3
[18318.039501] [<ffffffff8026665c>] filemap_fault+0x72/0x346
[18318.039507] [<ffffffff80271969>] __do_fault+0x51/0x4f5
[18318.039514] [<ffffffff802766b4>] handle_mm_fault+0x5f8/0xc46
[18318.039520] [<ffffffff80218197>] do_page_fault+0xb69/0xf46
[18318.039524] [<ffffffff803115ef>] __up_write+0x21/0x10e
[18318.039530] [<ffffffff80436587>] error_exit+0x0/0x69
[18318.039536]
[18318.039542] INFO: task exim:22404 blocked for more than 120 seconds.
[18318.039546] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[18318.039553] ffff8800018a5cb8 0000000000000282 ffff88007e3e58c0
ffff88007f81fbe0
[18318.039560] ffff88007d844d40 ffff88007c57ea80 ffff88007d844fc0
000000028020e810
[18318.039567] ffff880000000005 000000000004dc7f 000000000053b36a
ffff88000000000f
[18318.039573] Call Trace:
[18318.039579] [<ffffffff8020e911>] xen_clocksource_read+0xd/0x9c
[18318.039584] [<ffffffff802646c1>] sync_page+0x0/0x41
[18318.039588] [<ffffffff80243f2e>] getnstimeofday+0x39/0x98
[18318.039593] [<ffffffff802646c1>] sync_page+0x0/0x41
[18318.039597] [<ffffffff80434a5f>] io_schedule+0x5c/0x9e
[18318.039603] [<ffffffff802646fd>] sync_page+0x3c/0x41
[18318.039608] [<ffffffff80434bd2>] __wait_on_bit_lock+0x36/0x66
[18318.039614] [<ffffffff802646ae>] __lock_page+0x5e/0x64
[18318.039618] [<ffffffff8023f6c7>] wake_bit_function+0x0/0x23
[18318.039623] [<ffffffff8026488f>] find_lock_page+0x79/0xc3
[18318.039628] [<ffffffff8026665c>] filemap_fault+0x72/0x346
[18318.039634] [<ffffffff80271969>] __do_fault+0x51/0x4f5
[18318.039642] [<ffffffff802766b4>] handle_mm_fault+0x5f8/0xc46
[18318.039648] [<ffffffff80218197>] do_page_fault+0xb69/0xf46
[18318.350317] [<ffffffff803115ef>] __up_write+0x21/0x10e
[18318.350329] [<ffffffff80436587>] error_exit+0x0/0x69
[18318.350336]
[18320.184945] INFO: task exim:22372 blocked for more than 120 seconds.
[18320.184960] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"
disables this message.
[18320.184969] ffff880040ae3cb8 0000000000000286 ffff88007e3e58c0
ffff88007f81fbe0
[18320.184978] ffff880013102840 ffff88008066d480 ffff880013102ac0
000000028020e810
[18320.184986] ffff880000000005 000000000006db8b 000000000053c53c
ffff88000000000f

The configuration is:

kernel = '/boot/vmlinuz-2.6.26-2-xen-amd64'
ramdisk = '/boot/initrd.img-2.6.26-2-xen-amd64'
memory = '2048'
vcpus = '7'

# Disk device(s).
root = '/dev/sda2 ro'
disk = [
'phy:/dev/storage/domain.server.net-disk,sda2,w',
'phy:/dev/storage/domain.server.net-swap,sda1,w',
'phy:/dev/storage/domain.server.net-home,sda3,w',
'phy:/dev/storage/domain.server.net-home2,sda4,w',
'phy:/dev/storage/domain.server.net-home3,sda5,w',
'phy:/dev/storage/domain.server.net-mails,sda6,w',
'phy:/dev/storage/domain.server.net-exim,sda7,w',
'phy:/dev/storage/domain.server.net-var,sda8,w',
'phy:/dev/storage/domain.server.net-pgsql,sda9,w',
'phy:/dev/storage/domain.server.net-mysql,sda10,w',
'phy:/dev/storage/domain.server.net-apache,sda11,w',
'phy:/dev/storage/domain.server.net-tmp,sda12,w',
'phy:/dev/storage-backup/backup,sda13,w',
]

# Hostname
name = 'domain.server.net'

# Networking
vif = [ 'ip=190.***.***.***,mac=**:**:**' ]

root = "/dev/sda2 ro"
extra = "3 xencons=tty"

# Behaviour
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'


Any help would be much appreciated.

Regards, Alejandro


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