From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by dpdk.org (Postfix) with ESMTP id 8A3AE1B19; Tue, 11 Sep 2018 14:52:31 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A031540216E7; Tue, 11 Sep 2018 12:52:30 +0000 (UTC) Received: from [10.36.112.31] (ovpn-112-31.ams2.redhat.com [10.36.112.31]) by smtp.corp.redhat.com (Postfix) with ESMTPS id F35522027EA4; Tue, 11 Sep 2018 12:52:28 +0000 (UTC) To: Tiwei Bie , zhihong.wang@intel.com, dev@dpdk.org Cc: seanbh@gmail.com, anatoly.burakov@intel.com, stable@dpdk.org References: <20180905042852.6212-1-tiwei.bie@intel.com> <20180905042852.6212-2-tiwei.bie@intel.com> From: Maxime Coquelin Message-ID: Date: Tue, 11 Sep 2018 14:52:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180905042852.6212-2-tiwei.bie@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Tue, 11 Sep 2018 12:52:30 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.5]); Tue, 11 Sep 2018 12:52:30 +0000 (UTC) for IP:'10.11.54.4' DOMAIN:'int-mx04.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'maxime.coquelin@redhat.com' RCPT:'' Subject: Re: [dpdk-stable] [PATCH 1/3] net/virtio-user: fix deadlock in memory events callback X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Sep 2018 12:52:31 -0000 On 09/05/2018 06:28 AM, Tiwei Bie wrote: > Deadlock can occur when allocating memory if a vhost-kernel > based virtio-user device is in use. To fix the deadlock, > we will take memory hotplug lock explicitly in virtio-user > when necessary, and always call the _thread_unsafe memory > functions. > > Bugzilla ID: 81 > Fixes: 12ecb2f63b12 ("net/virtio-user: support memory hotplug") > Cc: stable@dpdk.org > > Reported-by: Seán Harte > Signed-off-by: Tiwei Bie > --- > drivers/net/virtio/virtio_user/vhost_kernel.c | 6 +++++- > .../net/virtio/virtio_user/virtio_user_dev.c | 19 +++++++++++++++++++ > 2 files changed, 24 insertions(+), 1 deletion(-) > Reviewed-by: Maxime Coquelin Thanks, Maxime