Re: [PATCH] vhost: remove a hack on queue allocation

[Yuanhan Liu <yuanhan.liu@linux.intel.com>]

On Sat, Apr 01, 2017 at 04:32:58PM +0800, Yuanhan Liu wrote:
> On Wed, Mar 22, 2017 at 04:56:12PM +0800, Yuanhan Liu wrote:
> > On Wed, Mar 22, 2017 at 09:41:07AM +0100, Maxime Coquelin wrote:
> > > 
> > > 
> > > On 03/02/2017 07:16 AM, Yuanhan Liu wrote:
> > > >We used to allocate queues based on the index from SET_VRING_CALL
> > > >request: if corresponding queue hasn't been allocated, allocate it.
> > > >
> > > >Though it's pratically right (it's the first per-vring request we
> > > >will get from QEMU for vhost-user negotiation), but it's not technically
> > > >right: it's not documented in the vhost-user spec that it will always
> > > >be the first per-vring request. For example, SET_VRING_ADDR could also
> > > >be the first per-vring request.
> > > >
> > > >Thus, we should not depend the SET_VRING_CALL on queue allocation.
> > > >Instead, we could catch all the per-vring messages at the entrance of
> > > >request handler, and allocate one if it hasn't been allocated before.
> > > >
> > > >By that, we could remove a hack.
> > > >
> > > >Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> > > >---
> > > >
> > > >v2: add missing break
> > > >---
> > > > lib/librte_vhost/vhost_user.c | 61 ++++++++++++++++++++++++++++++++++---------
> > > > 1 file changed, 48 insertions(+), 13 deletions(-)
> > > 
> > > 
> > > Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> > 
> > Thanks.
> > 
> > Applied to dpdk-next-virtio.
> 
> Reworked, as there is a silly error that cause crash.

Re-applied.

	--yliu

> -- >8 --
> >From 269ba9b3a6a1671f463b9f9d4cc0d51954f7a2f5 Mon Sep 17 00:00:00 2001
> From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
> Date: Thu, 2 Mar 2017 14:16:07 +0800
> Subject: [PATCH v3] vhost: remove a hack on queue allocation