Re: [Xen-devel] [PATCH] xenpaging: track number of paged pages i

To:	Tim Deegan <tim@xxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] xenpaging: track number of paged pages in struct domain
From:	Olaf Hering <olaf@xxxxxxxxx>
Date:	Fri, 16 Sep 2011 13:32:54 +0200
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On Fri, Sep 16, Tim Deegan wrote:

> At 14:26 +0200 on 15 Sep (1316096767), Olaf Hering wrote:
> > # HG changeset patch
> > # User Olaf Hering <olaf@xxxxxxxxx>
> > # Date 1316089500 -7200
> > # Node ID 13b4be345ebac016abe26386417824a0c47d762d
> > # Parent  e90438f6e6d1585a71b18784a99c162b5d95f390
> > xenpaging: track number of paged pages in struct domain
> > 
> > The toolstack should know how many pages are paged-out at a given point
> > in time so it could make smarter decisions about how many pages should
> > be paged or ballooned.
> > 
> > Add a new member to xen_domctl_getdomaininfo and bump interface version.
> > Use the new member in xc_dominfo_t.
> > The SONAME of libxc should be changed if this patch gets applied.
> > 
> > Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
> 
> For the xen parts, Acked-by: Tim Deegan <tim@xxxxxxx>
> 
> Again, I'd like the tools maintainers to ack/nack the change to the domctl
> interface and associated libxc plumbing.  

Thanks, but please wait a bit before applying it.
Eventually a new XENMEM op is required as well to export that value for
a guests balloon driver. I'm not finished yet with browsing the
codepaths which make use of tot_pages.

Olaf

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Re: [Xen-devel] [PATCH] xenpaging: track number of paged pages in struct