From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jason Wang <jasowang@redhat.com>
Subject: Re: [PATCH net-next] virtio-net: invoke zerocopy callback on xmit
	path if no tx napi
Date: Tue, 22 Aug 2017 19:47:35 +0800
Message-ID: <4f70e086-7efd-ef23-8940-e86ec06ad74d@redhat.com>
References: <20170819063854.27010-1-den@klaipeden.com>
	<5352c98a-fa48-fcf9-c062-9986a317a1b0@redhat.com>
	<CAF=yD-LZ4=WAYfUtY7xRWi50FRSkrcOa+b7uc46xRnC4sbDCzQ@mail.gmail.com>
	<64d451ae-9944-e978-5a05-54bb1a62aaad@redhat.com>
	<CAF=yD-L-9QnxV2kM_j2BxVk=h7i3wvMZxG-3_=0Q=jDPgeT=VQ@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <virtualization-bounces@lists.linux-foundation.org>
In-Reply-To: <CAF=yD-L-9QnxV2kM_j2BxVk=h7i3wvMZxG-3_=0Q=jDPgeT=VQ@mail.gmail.com>
Content-Language: en-US
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/virtualization>,
	<mailto:virtualization-request@lists.linux-foundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/virtualization/>
List-Post: <mailto:virtualization@lists.linux-foundation.org>
List-Help: <mailto:virtualization-request@lists.linux-foundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/virtualization>,
	<mailto:virtualization-request@lists.linux-foundation.org?subject=subscribe>
Sender: virtualization-bounces@lists.linux-foundation.org
Errors-To: virtualization-bounces@lists.linux-foundation.org
To: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Network Development <netdev@vger.kernel.org>, virtualization@lists.linux-foundation.org, Koichiro Den <den@klaipeden.com>, "Michael S. Tsirkin" <mst@redhat.com>
List-Id: virtualization@lists.linuxfoundation.org
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