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xen-devel
Re: [Xen-devel] UML->Xen laundry list
Matthew Bloch wrote:
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?
At the moment you can't - the vif interfaces in dom0 are created by
the back-end network drivers. You could modify /etc/xen/scripts/vif-bridge
or configure a different script if you need to do stuff to the vif.
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)
You can't. Xen doesn't know the names of domains (well not the full names
anyway), only xend knows what the domain names are.
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.
It's documented in docs/misc/xen_config.html (and possibly elsewhere).
Basically it's a lisp coding of xml.
Mike
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