[Libvir] can't start windows guest domains

[Richard W.M. Jones]

Thomas Antony wrote:
> Mon, 10 Sep 2007 20:38:31 ERROR    virDomainCreateLinux() failed POST 
> operation failed: (xend.err "Error creating domain: (12, 'Cannot 
> allocate memory')")

I think I've seen this one, and if so then it has been fixed but the 
problem may not have made it out to Fedora yet (it was a bug in Xen itself).

It was caused by Domain-0 not being able to balloon down its memory 
usage by enough to accomodate the new domain.  The workaround is to 
reduce the amount of memory allocated to Domain-0 manually first, eg:

   virsh setmaxmem 0 128000

but you'll have to modify '128000' to be some amount of memory in 
kilobytes which is the current Domain-0 allocation, less what is needed 
for your new domain, less a bit more for good luck...

Rich.

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