From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54321) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gW02W-00071G-3Y for qemu-devel@nongnu.org; Sun, 09 Dec 2018 09:26:36 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gW02R-0004Co-Bl for qemu-devel@nongnu.org; Sun, 09 Dec 2018 09:26:36 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57826) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gW02R-0004CH-4i for qemu-devel@nongnu.org; Sun, 09 Dec 2018 09:26:31 -0500 Date: Sun, 9 Dec 2018 09:26:24 -0500 From: "Michael S. Tsirkin" Message-ID: <20181209092558-mutt-send-email-mst@kernel.org> References: <7CECC2DFC21538489F72729DF5EFB4D908ABD3A4@dggemm521-mbs.china.huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7CECC2DFC21538489F72729DF5EFB4D908ABD3A4@dggemm521-mbs.china.huawei.com> Subject: Re: [Qemu-devel] [BUG]Unassigned mem write during pci device hot-plug List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xuyandong Cc: "marcel@redhat.com" , Paolo Bonzini , "qemu-devel@nongnu.org" , Zhanghailiang , "wangxin (U)" , "Huangweidong (C)" On Sat, Dec 08, 2018 at 11:58:59AM +0000, xuyandong wrote: > Hi all, > > > > In our test, we configured VM with several pci-bridges and a virtio-net nic > been attached with bus 4, > > After VM is startup, We ping this nic from host to judge if it is working > normally. Then, we hot add pci devices to this VM with bus 0. > > We found the virtio-net NIC in bus 4 is not working (can not connect) > occasionally, as it kick virtio backend failure with error below: > > Unassigned mem write 00000000fc803004 = 0x1 Thanks for the report. Which guest was used to produce this problem? -- MST