Re: 1G huge pages in Linux guest VM

[Sriram Murthy <sriramsm@yahoo.com>]

If I have a mix of 2M and 1G pages on the host, how will I be able to pass the same to the guest?. Does KVM and Libvirtd allow multiple -mem-path options?. 
Also, where in the source can I find more info about hugepage support in KVM?
Thanks and regards,
Sriram

--- On Wed, 5/9/12, Avi Kivity <avi@redhat.com> wrote:

> From: Avi Kivity <avi@redhat.com>
> Subject: Re: 1G huge pages in Linux guest VM
> To: "Sriram Murthy" <sriramsm@yahoo.com>
> Cc: kvm@vger.kernel.org
> Date: Wednesday, May 9, 2012, 2:55 AM
> On 05/08/2012 09:38 PM, Sriram Murthy
> wrote:
> > Hi,
> >    I wanted to know if we can pass a
> hugetlbfs with pagesize=1G created on the host to a Linux
> guest (The host is running RHEL 6.2 - x86_64 on Intel
> Westmere)?. 
> 
> Yes, this is supported.
> 
> >    I am using RHEL 6.2 on the host and guest
> and the processor that has been passed by KVM to the guest
> is Intel Westmere and has the pdpe1gb flag set. Does this
> mean that the guest supports 1G huge pages?
> 
> Yes.  Note 1gb hugepages on the guest are supported
> even if not provided
> by the host (of course the performance improvement will be
> smaller).
> 
> -- 
> error compiling committee.c: too many arguments to function
> 
>