Xen on Ubuntu: DomU hangs on boot

[Victor Padro]

On Nov 30, 2007 11:04 AM, Allen Fowler <allen.fowler at yahoo.com> wrote:

>
> >
> > I've heard rumors that a DomU might hang when trying
> > to access the
> > hwclock. Try disabling the relevant start scrips /
> > udev rules in the DomU.
> >
>
> Interesting....
>
> I just checked a DomU (with new disk image) that I
> left "hung" pegging the CPU at 99% for 6+ hours.
>
> Guess what?  It finally booted, and "top" shows a
> process 'hwclock' using all the CPU.
>
> I was able to kill the process and the DomU CPU usage
> fell to expected levels.
>
> How do I disable the "hwclock" at boot up, and is it
> safe to do so?
>
> What does "hwclock" do?
>

Acording to the Linux
Dictionary<http://www.tldp.org/LDP/Linux-Dictionary/html/h.html>
:
* hwclock *

query and set the hardware clock (RTC) From whatis
http://www.tldp.org/LDP/Linux-Dictionary/html/index.html


>
> I am not at all familiar with the way Unix/Linux
> handles the boot and startup process.
>
>
> > BTW: it would be nice if you could stop top posting.
> > And it would be
> > even nicer if you could get a mail client that
> > doesn't break threading.
> >
>
> Sorry about that.. How is the treading now?
>
> I had switched to the new Yahoo Mail interface that
> seems to not allow (?) in-line quoting.
>
> p.s. I am going to also post this to the ubuntu-server
> list, as it would seem relevant for those users, too.
>
>
>
>
>
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