Re: [Xen-devel] [PATCH v3] tools/libxc: Batch memory allocations for PV guests

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, Jun 17, 2015 at 12:14:03PM +0100, Ian Campbell wrote:
> On Mon, 2015-06-15 at 17:08 +0100, Wei Liu wrote:
> > On Mon, Jun 15, 2015 at 11:12:07AM +0100, Ross Lagerwall wrote:
> > > The current code for allocating memory for PV guests batches the
> > > hypercalls to allocate memory by allocating 1024*1024 extents of order 0
> > > at a time. To make this faster, first try allocating extents of order 9
> > > (2 MiB) before falling back to the order 0 allocating if the order 9
> > > allocation fails.
> > > 
> > > On my test machine this reduced the time to start a 128 GiB PV guest by
> > > about 60 seconds.
> 
> >From 61s or from 600s?
> 
> > > 
> > > Signed-off-by: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
> > 
> > Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
> 
> Applied. There were some rejects due to "libxc: unify handling of vNUMA
> layout" having gone in first, I think they were just contextual and they
> seemed trivial to resolve, but please do (both) check.
> 

The patch looks good to me.

Wei.

> Ian.

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