Re: [libvirt] [PATCH] add flag to enforce hugepage backing of guest RAM
On 02/04/2014 07:42 PM, Marcelo Tosatti wrote:
>
> <hugepages>
> <size strict='yes' unit='G'>1</size>
> </hugepages>
>
> where strict could be no if we are giving a hint but don't care if the
> hint cannot be honored (default yes if omitted), and where unit + value
Its awkward because you'd always want the largest hugepages size
possible, to reduce TLB pressure. So its hard to find use for
<size strict='no' unit='G'>1</size>
So what about <size strict unit='K/G/M'>x</size> ?
XML attributes don't work that way. Either you have strict='yes' or you
omit it; but if there is no reason to ever not have strict, then it
would be sufficient to have:
<hugepages>
<size unit='K/G/M'>x</size>
</hugepages>
where omitting the <size> subelement is a sign that it doesn't matter.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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