UML->Xen laundry list

[Matthew Bloch <matthew@bytemark.co.uk>]

Hello,

I'm nearly finished converting our hosting scripts (in Ruby) to work 
with Xen as well as UML so wondered whether I could solicit some 
miscellaneous comments on my remaining jobs.   I appreciate there may be 
(yet) no official way to do any of these, but I'd appreciate pointers to 
the relevant bits of source or any other relevant discussion.  The 
reason is I'm keen to make a few hacks to the user-space tools to better 
integrate with our existing scripts, not because I'm just poking around 
in lower level interfaces for fun (though I am having fun :) ).

How to send a Ctrl+Alt+Delete (or sysrq) to a XenLinux guest kernel?

How to create a vif interface from dom0, supply it pre-configured to a 
domain?

Disc synchronisation: when specifying a block device as a file: from a 
Linux domain 0, does the back-end driver in dom0 cache disc writes from 
other domains?  i.e. if power is lost, could the journalled filesystems 
in other domains become corrupted?  I'm guessing the answer is "no" but 
this is just one of those avoidable hazards of UML that I wish to avoid 
again if possible.

Where in the libxc C interface can I find the name of a domain?  I know 
I probably shouldn't be using this interface, I'm just curious.  (there 
must be a better way than grovelling around in /var/xen)

Finally any docs on the sxp libraries: purpose and formats would be 
greatly appreciated.  I assume it's a light cross-language data 
serialization library but haven't dug very deeply yet.

cheers,

-- 
Matthew



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