From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-um-bounces+geert=linux-m68k.org@lists.infradead.org>
Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124])
	by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux))
	id 1o7BzA-003dwX-JC
	for linux-um@lists.infradead.org; Fri, 01 Jul 2022 08:26:48 +0000
Received: by mail-pg1-f199.google.com with SMTP id a15-20020a65604f000000b00401a9baf7d5so993643pgp.0
        for <linux-um@lists.infradead.org>; Fri, 01 Jul 2022 01:26:40 -0700 (PDT)
Message-ID: <3e36e44f-1f37-ad02-eb89-833a0856ec4e@redhat.com>
Date: Fri, 1 Jul 2022 16:26:25 +0800
MIME-Version: 1.0
Subject: Re: [PATCH v11 08/40] virtio_ring: split: extract the logic of alloc
 queue
References: <20220629065656.54420-1-xuanzhuo@linux.alibaba.com>
 <20220629065656.54420-9-xuanzhuo@linux.alibaba.com>
From: Jason Wang <jasowang@redhat.com>
In-Reply-To: <20220629065656.54420-9-xuanzhuo@linux.alibaba.com>
Content-Language: en-US
List-Id: <linux-um.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-um>,
 <mailto:linux-um-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-um/>
List-Post: <mailto:linux-um@lists.infradead.org>
List-Help: <mailto:linux-um-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-um>,
 <mailto:linux-um-request@lists.infradead.org?subject=subscribe>
Content-Transfer-Encoding: base64
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Sender: "linux-um" <linux-um-bounces@lists.infradead.org>
Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org
To: Xuan Zhuo <xuanzhuo@linux.alibaba.com>, virtualization@lists.linux-foundation.org
Cc: Richard Weinberger <richard@nod.at>, Anton Ivanov <anton.ivanov@cambridgegreys.com>, Johannes Berg <johannes@sipsolutions.net>, "Michael S. Tsirkin" <mst@redhat.com>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, Hans de Goede <hdegoede@redhat.com>, Mark Gross <markgross@kernel.org>, Vadim Pasternak <vadimp@nvidia.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Cornelia Huck <cohuck@redhat.com>, Halil Pasic <pasic@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Alexander Gordeev <agordeev@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Sven Schnelle <svens@linux.ibm.com>, Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, Jesper Dangaard Brouer <hawk@kernel.org>, John Fastabend <john.fastabend@gmail.com>, Vincent Whitchurch <vincent.whitchurch@axis.com>, linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org, kangjie.xu@linux.alibaba.com
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