Re: [Xen-users] xen save error

[Steven Hand <Steven.Hand@xxxxxxxxxxxx>]

>If there is any additional probing around you want me to do let me know.
> I'm willing to help get more information.

Thanks - one interesting fact would be what workload (if any) is running
within your guest? 

I've now managed to repro it about 3 times (out of probably a thousand
live relocations) so it's definitely rarer for me... but one possible
common cause is that the guest was 'quiet' just prior to the hang (I 
have a workload script that alternates beween disk I/O, cpu load, 
network load + sleep with random timeouts).

As you had identified, the domain is not entering __do_shutdown() 
at all in the 'hang' case which points to some relatively low level
issue at iether ctrl_if or xen level. 

Have an instrumented system now and will rerun overnight ; hopefully
some useful data will come out in the morning. 

cheers,

S.

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