From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37544) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YLwmq-0005io-9F for qemu-devel@nongnu.org; Thu, 12 Feb 2015 11:38:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YLwmm-00063F-TA for qemu-devel@nongnu.org; Thu, 12 Feb 2015 11:38:44 -0500 Received: from mx1.redhat.com ([209.132.183.28]:40386) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YLwmm-00062q-MN for qemu-devel@nongnu.org; Thu, 12 Feb 2015 11:38:40 -0500 Date: Thu, 12 Feb 2015 17:38:29 +0100 From: "Michael S. Tsirkin" Message-ID: <20150212163829.GC24371@redhat.com> References: <1423547293-8448-1-git-send-email-haifeng.lin@huawei.com> <20150210084632.GA8397@redhat.com> <54D9DCF8.2000106@huawei.com> <20150210104126.GE9505@redhat.com> <54D9F294.2090000@huawei.com> <20150210120422.GA5339@redhat.com> <54DAB29A.8010202@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <54DAB29A.8010202@huawei.com> Subject: Re: [Qemu-devel] [PATCH v1 1/2] vhost-user: support SET_MEM_TABLE waite the result of mmap List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Linhaifeng Cc: arei.gonglei@huawei.com, qemu-devel@nongnu.org On Wed, Feb 11, 2015 at 09:38:34AM +0800, Linhaifeng wrote: > > > On 2015/2/10 20:04, Michael S. Tsirkin wrote: > > So that's not good. We need a way to negotiate the capability, > > we can't just deadlock with legacy slaves. > > Should we wait many seconds if slave not reply we just return error? I would prefer something more robust. Isn't there a version field we can use? > -- > Regards, > Haifeng