linux-kernel - Re: [PATCH v4 6/6] virtio-balloon: Add support for providing unused page reports to host

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Date:   Mon, 12 Aug 2019 08:20:43 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     Nitesh Narayan Lal <nitesh@...hat.com>,
        kvm list <kvm@...r.kernel.org>,
        David Hildenbrand <david@...hat.com>,
        Dave Hansen <dave.hansen@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Yang Zhang <yang.zhang.wz@...il.com>, pagupta@...hat.com,
        Rik van Riel <riel@...riel.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Matthew Wilcox <willy@...radead.org>, lcapitulino@...hat.com,
        wei.w.wang@...el.com, Andrea Arcangeli <aarcange@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>, dan.j.williams@...el.com,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Subject: Re: [PATCH v4 6/6] virtio-balloon: Add support for providing unused
 page reports to host

On Mon, Aug 12, 2019 at 2:53 AM Michael S. Tsirkin <mst@...hat.com> wrote:
>
> On Wed, Aug 07, 2019 at 03:42:19PM -0700, Alexander Duyck wrote:
> > From: Alexander Duyck <alexander.h.duyck@...ux.intel.com>

<snip>

> > --- a/include/uapi/linux/virtio_balloon.h
> > +++ b/include/uapi/linux/virtio_balloon.h
> > @@ -36,6 +36,7 @@
> >  #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM      2 /* Deflate balloon on OOM */
> >  #define VIRTIO_BALLOON_F_FREE_PAGE_HINT      3 /* VQ to report free pages */
> >  #define VIRTIO_BALLOON_F_PAGE_POISON 4 /* Guest is using page poisoning */
> > +#define VIRTIO_BALLOON_F_REPORTING   5 /* Page reporting virtqueue */
> >
> >  /* Size of a PFN in the balloon interface. */
> >  #define VIRTIO_BALLOON_PFN_SHIFT 12
>
> Just a small comment: same as any feature bit,
> or indeed any host/guest interface changes, please
> CC virtio-dev on any changes to this UAPI file.
> We must maintain these in the central place in the spec,
> otherwise we run a risk of conflicts.
>

Okay, other than that if I resubmit with the virtio-dev list added to
you thing this patch set is ready to be acked and pulled into either
the virtio or mm tree assuming there is no other significant feedback
that comes in?

Thanks.

- Alex