RE: [Xen-devel] pre-reservation of memory for domain creation

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> "Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx> 14.01.10 08:19 >>>
>    Currently guest initialization process in xend (XendDomainInfo.py) is: 
>
>    _constructDomain() --> domain_create() --> domain_max_vcpus() ... -->
>    _initDomain() --> shadow_mem_control() ...

While the patch certainly matches what I had in mind, with this sequence
it is clear that the tools still will need adjustment: The full ballooning only
happens from _initDomain(), and hence the pre-reservation (from
_constructDomain) of 4Mb would still be too small for large vCPU counts.

I wonder though what all this memory is needed for before the domain
(not to speak of secondary CPUs) actually gets started. If that could be
got under control, tools side adjustment would not be necessary. Tim?

Jan


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