Re: [Xen-devel] Re: almost working

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>]

> > I suspect adding devfs support wouldn't be too hard, but its
> > probably not high on the list of priorities for us. Do any
> > common distros use it by default?
> > 
> > > having booted my new domain, 'xm list' in dom0 hung for ages with 100% 
> > > cpu time until I hit ctrl-C. trying it again worked fine though.
> > 
> > Not good. I think xend is getting more robust over time.
> > 
> 
> I have seen a number of ''heisenbugs" with xend. They especially occur
> when I stop xend and start it again. Every now and then a 'xend start'
> does nothing and sends no output to console. Commands such as 'xm
> list' will give a 'Connection refused' error. A 'xend stop' followed
> by a 'xend start' usually fixes this but there have been a few times
> where I have had to repeat the cycle a couple of times.

Could you try running xend with "xend start_trace". It might give
a clue as to what is going wrong if you compare traces.

It would be nice to get this nailed.

Thanks,
Ian

> Also, sometimes after a reboot, a domain creation just fails and the
> 'xm create' command does not return. There are no error messages from
> xend. Even though I suspect that things are hosed at this point in
> time, a 'xend stop' works. However xend will not startup again and
> gives a 'IOError: [Errno 16] Device or resource busy' error. The
> problem cannot be reproduced as the  same create command works after
> another reboot.
> 
> Niraj
> 
> 
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