Russ Blaine russell.blaine at sun.com
Tue Jan 29 18:01:35 UTC 2008

Daniel P. Berrange wrote:
> Can you edit the src/xen_internal.c file and in the xenHypervisorGetDomInfo()
> method, add a printf() for the 'domain_flags' flags variable.  IMHO the
> way we deal with this isn't quite correct. We merely mask out the high 
> bits and then switch on the resulting value. This isn't the way the Xen
> hypervisor uses this field though. Xen more or less uses the whole thing
> as as bitmask, allowing near arbitrary combinations of bits to be set.
> So I think what is happening is there's a combo of bits set which cause
> the switch() statement to fail all cases, resulting in NOSTATE.
> We'll probably need to replace the switch(domain_flags) with something 
> which explicitly tests for the bits we're interested in, rather than
> looking at the value as a whole.

when xenHypervisorGetDomInfo() returns VIR_DOMAIN_NONE, domain_flags is 0 
(sampled after the HVM bit has been masked out). So is there some other 
state implied by domain_flags being 0? In all cases I have seen, the domain 
is actually running -- accumulating CPU time, etc.

Russ Blaine | Solaris Kernel | russell.blaine at sun.com

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