Re: [Xen-devel] [RFC PATCH 8/8]: PVH: privcmd changes

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

On Wed, 12 Sep 2012 08:36:59 +0100
Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:

> On Wed, 2012-09-12 at 02:32 +0100, Mukesh Rathor wrote:
> > On Tue, 11 Sep 2012 15:10:23 +0100
> > Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> > 
> > > On Thu, 2012-08-16 at 02:07 +0100, Mukesh Rathor wrote:
> > > > ---
> > > >  drivers/xen/privcmd.c |   68
> > > > +       if (rc != 0) {
> > > > +               pr_warn("%s Could not alloc %d pfns rc:%d\n",
> > > > __FUNCTION__,
> > > > +                       numpgs, rc);
> > > > +               kfree(savp->sp_paga);
> > > > +               kfree(savp);
> > > > +               return -ENOMEM;
> > > > +       }
> > > 
> > > I've just been building on this patch to make proper mmap foreign
> > > support on ARM and I was looking for the place which freed this,
> > > both the pages back to the balloon and then the array itself.
> > > There is code in privcmd_close which unmaps the P2M, but I can't
> > > find the code which frees things back to the balloon. Have I
> > > missed something?
> > 
> > You are right, I missed the free. Let me revisit it and make some
> > changes.
> 
> Thanks.
> 
> Any comments on the rest of my mail? We need to agree what the
> interface between the generic and the per-arch code is going to look
> like here.
> 
> Ian.

Right, I am paging it all in the brain right now, as I made the changes
a while ago :). I will attempt to change the code according to
your email, to come up with generic interface. Also I am going to come
up with xen_unmap_domain_mfn_range. Mostly agree with your email. More
soon.

thanks,
Mukesh

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