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Old 12-04-2008, 12:06 PM
Ivan Savcic
Default Bug#507785: xen-linux-system: Xen domU clock frozen on dom0 boot

Package: xen-linux-system-2.6.26-1-xen-686
Version: 2.6.26-10
Severity: important
File: xen-linux-system

When dom0 boots up, all restored domUs (2 x etch and 1 x lenny) have their clocks set to the time when they were restored and their
clocks are "frozen" in that time, with following error appearing in all domUs' dmesg:

clocksource/0: Time went backwards: ret=b01d2985eb delta=-929476120446 shadow=b00552031d offset=17d7f610

(ret, delta, shadow and offset vary over time)

"xm destroy domU && xm create domU.cfg" seems to fix the problem, but only until I reboot/shutdown dom0 again.

Manual "/etc/init.d/xendomains restart" doesn't fix the problem, but it doesn't reintroduce it either once the domUs have been manually
recreated with xm destroy/create.

This happens on every dom0 boot.

domU.cfg (Created with xen-tools, other domUs have pretty much similar config. "virtual" is the name of LVM VG.):

kernel = '/boot/vmlinuz-2.6.26-1-xen-686'
ramdisk = '/boot/initrd.img-2.6.26-1-xen-686'
memory = '256'
root = '/dev/sda2 ro'
disk = [ 'phy:virtual/vm2-swap,sda1,w', 'phy:virtual/vm2-root,sda2,w', ]
name = 'domU'
vif = [ 'ip=,mac=00:16:3E:C9:B2:1C' ]
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'

I'm sorry if I filed this bug under the wrong package, but it seemed correct since xen-linux-system covers pretty much everything xen* .

Ivan Savcic

-- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-xen-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages xen-linux-system-2.6.26-1-xen-686 depends on:
ii linux-image-2.6.26-1-xen-686 2.6.26-10 Linux 2.6.26 image on i686
ii xen-hypervisor-3.2-1-i386 3.2.1-2 The Xen Hypervisor on i386

xen-linux-system-2.6.26-1-xen-686 recommends no packages.

xen-linux-system-2.6.26-1-xen-686 suggests no packages.

-- no debconf information

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