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 ([170.10.133.124])
 by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux))
 id 1ne9Ta-00Bnn8-Cf
 for linux-um@lists.infradead.org; Tue, 12 Apr 2022 05:54:07 +0000
Received: by mail-pg1-f197.google.com with SMTP id
 78-20020a630651000000b0039d993c3c55so445207pgg.14
 for <linux-um@lists.infradead.org>; Mon, 11 Apr 2022 22:54:02 -0700 (PDT)
Message-ID: <f79fc367-7ac5-961b-83c5-90f3d097c672@redhat.com>
Date: Tue, 12 Apr 2022 13:53:44 +0800
MIME-Version: 1.0
Subject: Re: [PATCH v9 11/32] virtio_ring: split: introduce
 virtqueue_resize_split()
References: <20220406034346.74409-1-xuanzhuo@linux.alibaba.com>
 <20220406034346.74409-12-xuanzhuo@linux.alibaba.com>
From: Jason Wang <jasowang@redhat.com>
In-Reply-To: <20220406034346.74409-12-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: Jeff Dike <jdike@addtoit.com>, Richard Weinberger <richard@nod.at>, Anton Ivanov <anton.ivanov@cambridgegreys.com>, "Michael S. Tsirkin" <mst@redhat.com>, "David S. Miller" <davem@davemloft.net>, Jakub Kicinski <kuba@kernel.org>, 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>, Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Alexander Gordeev <agordeev@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>, Johannes Berg <johannes.berg@intel.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
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