Re: [Xen-users] intermittent domU issue: related to udev?

["Iain J. Watson" <iain@xxxxxxxxxxxxxxx>]

On Sun, Apr 19, 2009 at 3:31 PM, Eric Lenio <eric@xxxxxxxxx> wrote:
> Hello list.  My server:
>
> Gentoo 2.6.21-xen dom0
> xen-tools 3.2.1
> lvm 2.02.28-r2
> udev-115-r1
>
>
> Symptoms: normally I run 4 domUs.  About once a week I have a need to
> restart a domU.  Sometimes it works just fine, but other times it does
> not and I'll get a message back saying "Error: Device 0 (vif) could not
> be connected. Hotplug scripts not working".  The domU config file has
> not been changed so I'm fairly certain it is configured properly.  I
> think it comes down to the domU not being able to "talk" with udevd.  I
> know udevd is still running and is responsive (if I run udevmonitor and
> mount/umount a disk I see normal output).  When I attempt to start my
> domU I normally see udevmonitor output like this:
>
> UEVENT[1240149226.992189] add      /devices/xen-backend/vbd-9-2048 
> (xen-backend)
> UDEV  [1240149226.993163] add      /devices/xen-backend/vbd-9-2048 
> (xen-backend)
> UEVENT[1240149227.012202] add      /devices/xen-backend/vbd-9-2064 
> (xen-backend)
> UDEV  [1240149227.013301] add      /devices/xen-backend/vbd-9-2064 
> (xen-backend)
> UEVENT[1240149227.045410] add      /devices/xen-backend/vif-9-0 (xen-backend)
> UDEV  [1240149227.048638] add      /devices/xen-backend/vif-9-0 (xen-backend)
> UEVENT[1240149227.051320] add      /devices/virtual/net/vif9.0 (net)
> UEVENT[1240149227.051805] online   /devices/xen-backend/vif-9-0 (xen-backend)
> UDEV  [1240149227.054369] online   /devices/xen-backend/vif-9-0 (xen-backend)
> UDEV  [1240149227.062738] add      /devices/virtual/net/vif9.0 (net)
> UEVENT[1240149227.108918] add      /devices/xen-backend/console-9-0 
> (xen-backend)
> UDEV  [1240149227.110112] add      /devices/xen-backend/console-9-0 
> (xen-backend)
>
>
> But when the issue happens I see no udevmonitor output.  Restarting
> udevd did not help.  The problem does not seem specific to any
> particular domU -- once the condition happens, none of the domUs will
> restart.  My only solution so far has been to restart dom0.
> Suggestions?
>

I am having a similar problem. I don't know about the complete lack of
udevd activity as I didn't know about that command but I'll be
checking tomorrow.

Did you have any luck chasing this problem down?

Regards,
Iain Watson

-- 
"Just think how stupid the average person is,
and then realize that half of them are even stupider!"
--George Carlin

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users