Re: [Xen-devel] [PATCH 4/6] xc: XENMEM_claim_pages outstanding claims value

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, Mar 13, 2013 at 10:43:28AM +0000, Ian Campbell wrote:
> On Mon, 2013-03-11 at 14:20 +0000, Konrad Rzeszutek Wilk wrote:
> > From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
> > 
> > This is patch provides the value of claimed pages but
> > not yet accounted for in a domain (outstanding). This is a
> > total global value that influences the hypervisors' MM system.
> > This value - when the guest has finally been created and is
> > running - ends up having the value zero. But during the
> > memory populate calls the contents of this value will
> > decrease.
> 
> I think you are trying to say that it jumps to some large value when a
> claim is made, and then reduces as the domain's memory is populated and
> eventually reaches zero (either through allocations or the claim being
> released)?

<laughs>
Yes. That is what I was trying to say :-)
> 
> > 
> > Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
> > [v2: s/unclaimed_pages/outstanding_pages/ per Tim's suggestion]
> > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > ---
> >  tools/libxc/xc_domain.c | 1 +
> >  tools/libxc/xenctrl.h   | 1 +
> >  2 files changed, 2 insertions(+)
> > 
> > diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
> > index b8a345c..ab6dde5 100644
> > --- a/tools/libxc/xc_domain.c
> > +++ b/tools/libxc/xc_domain.c
> > @@ -234,6 +234,7 @@ int xc_domain_getinfo(xc_interface *xch,
> >  
> >          info->ssidref  = domctl.u.getdomaininfo.ssidref;
> >          info->nr_pages = domctl.u.getdomaininfo.tot_pages;
> > +        info->nr_outstanding_pages = 
> > domctl.u.getdomaininfo.outstanding_pages;
> >          info->nr_shared_pages = domctl.u.getdomaininfo.shr_pages;
> >          info->nr_paged_pages = domctl.u.getdomaininfo.paged_pages;
> >          info->max_memkb = domctl.u.getdomaininfo.max_pages << 
> > (PAGE_SHIFT-10);
> > diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h
> > index e695456..2a4d4df 100644
> > --- a/tools/libxc/xenctrl.h
> > +++ b/tools/libxc/xenctrl.h
> > @@ -364,6 +364,7 @@ typedef struct xc_dominfo {
> >                    hvm:1, debugged:1;
> >      unsigned int  shutdown_reason; /* only meaningful if shutdown==1 */
> >      unsigned long nr_pages; /* current number, not maximum */
> > +    unsigned long nr_outstanding_pages;
> >      unsigned long nr_shared_pages;
> >      unsigned long nr_paged_pages;
> >      unsigned long shared_info_frame;
> 
> 
> 
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