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Date: Wed, 27 Jul 2016 07:21:15 +0300
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v3 0/2] vhost-user: Extend protocol to
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To: =?iso-8859-1?Q?Marc-Andr=E9?= Lureau <marcandre.lureau@gmail.com>
Cc: Prerna <saxenap.ltc@gmail.com>, Prerna Saxena <prerna.saxena@nutanix.com>, Anil Kumar Boggarapu <anilkumar.boggarapu@nutanix.com>, QEMU <qemu-devel@nongnu.org>, Felipe Franciosi <felipe@nutanix.com>

On Mon, Jul 25, 2016 at 02:27:18PM +0400, Marc-Andr=E9 Lureau wrote:
> Hi
>=20
> On Mon, Jul 25, 2016 at 10:41 AM, Prerna <saxenap.ltc@gmail.com> wrote:
> >
> >
> > On Thu, Jul 7, 2016 at 12:04 PM, Prerna Saxena <saxenap.ltc@gmail.com=
>
> > wrote:
> >>
> >> From: Prerna Saxena <prerna.saxena@nutanix.com>
> >>
> >> The current vhost-user protocol requires the client to send response=
s to
> >> only a
> >> few commands. For the remaining commands, it is impossible for QEMU =
to
> >> know the
> >> status of the requested operation -- ie, did it succeed? If so, by w=
hat
> >> time?
> >>
> >> This is inconvenient, and can also lead to races. As an example:
> >>  [..snip..]
> >>
> >> References:
> >> v1 : https://lists.gnu.org/archive/html/qemu-devel/2016-06/msg07152.=
html
> >> v2 : https://lists.gnu.org/archive/html/qemu-devel/2016-07/msg00048.=
html
> >>
> >>
> >> Prerna Saxena (2):
> >>   vhost-user: Introduce a new protocol feature REPLY_ACK.
> >>   vhost-user: Attempt to fix a race with set_mem_table.
> >>
> >>  docs/specs/vhost-user.txt |  44 +++++++++++++++
> >>  hw/virtio/vhost-user.c    | 133
> >> ++++++++++++++++++++++++++++++----------------
> >>  2 files changed, 130 insertions(+), 47 deletions(-)
> >>
> >
> > Ping !
> > Michael, MarcAndre, Did you have a chance to look at this patch serie=
s?
> >
>=20
> That's not going to make it in 2.7 I am afraid.

It's a bugfix so - depends on how quickly can comments be addressed.

--=20
MST