[Libvir] virDomainDump() API (equivalent to xm dump) in libvirt?
Lon Hohberger
lhh at redhat.com
Fri Nov 3 16:36:32 UTC 2006
On Fri, 2006-11-03 at 10:53 -0500, Daniel Veillard wrote:
> Okay I can see how this would be useful, the questions I would have would be:
> - how generic is this, i.e. suppose a different hypervisor back-end
> would this still make sense. I guess yes, for example with an UML
> back-end we could check the process status and force a dump with a
> signal and move the core to the given file not trivial but same semantic
> would be doable.
This I don't know a lot about. I hadn't considered the implications of
using this on non-Xen guests. :o I think I agree with you, though. The
only weird part I can think of with UML is that because it behaves like
a normal process, we'd have to tweak the process's core limit before
causing it to dump...?
> - can we implement it with current xen, again yes, we should be able
> if we have a full connection (root) to do the same as 'xm dump-core'
Yes, given that xm dump-core can do it ;)
> - is the API clean enough, I guess the semantic is relatively clear
> instead of stating 'If you set the lowest-bit in flags' I would rather
> define a DumpFlags enum and state that flags is an or'ing of any of them
> I would probably name the function virDomainDumpCore though to not
> confuse with virDomainSave
Totally correct here, it should be an enum of flags (with only one
defined initially; I don't know what other flags there might be.
> So yes, why not, you want to work on it ? Or should I (or any candidate).
Give me a few; I'll check on this. I don't have problems trying it, but
I will have a learning curve of course.
-- Lon
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