From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Subject: Re: [PATCH] vhost: Introduce vhost-user's REPLY_ACK
	feature
Date: Tue, 13 Dec 2016 18:03:06 +0800
Message-ID: <20161213100306.GD18991@yliu-dev.sh.intel.com>
References: <20161212175400.7978-1-maxime.coquelin@redhat.com>
 <20161213095602.GC18991@yliu-dev.sh.intel.com>
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To: Maxime Coquelin <maxime.coquelin@redhat.com>
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On Tue, Dec 13, 2016 at 10:57:10AM +0100, Maxime Coquelin wrote:
> 
> 
> On 12/13/2016 10:56 AM, Yuanhan Liu wrote:
> >On Mon, Dec 12, 2016 at 06:54:00PM +0100, Maxime Coquelin wrote:
> >>REPLY_ACK features provide a generic way for QEMU to ensure both
> >>completion and success of a request.
> >>
> >>As described in vhost-user spec in QEMU repository, QEMU sets
> >>VHOST_USER_NEED_REPLY flag (bit 3) when expecting a reply_ack from
> >>the backend. Backend must reply with 0 for success or non-zero
> >>otherwise when flag is set.
> >>
> >>Currently, only VHOST_USER_SET_MEM_TABLE request implements reply_ack,
> >>in order to synchronize mapping updates.
> >>
> >>This patch enables REPLY_ACK feature generally, but only checks error
> >>code for VHOST_USER_SET_MEM_TABLE.
> >>
> >>Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> >
> >Thanks for the patch: it looks good and straightforward to me.
> Good!
> 
> >
> >>---
> >>Hi,
> >>
> >>The intend of this patch is not to fix a known issue, but it is
> >>nice to have this feature, and it will be used by upcoming MTU
> >>feature if it remains in its current form.
> >
> >Just asking, when do you plan to send out the patches?
> As soon as QEMU part is accepted, because changes in QEMU series
> may impact DPDK's one.

But maybe you could send them out earlier, so that we could have
understand it better?

	--yliu