From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47724) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XCrxb-0003Dt-J4 for qemu-devel@nongnu.org; Thu, 31 Jul 2014 11:08:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XCrxS-0001EO-IC for qemu-devel@nongnu.org; Thu, 31 Jul 2014 11:08:03 -0400 Received: from mail-qa0-x22d.google.com ([2607:f8b0:400d:c00::22d]:53970) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XCrxS-0001E7-D2 for qemu-devel@nongnu.org; Thu, 31 Jul 2014 11:07:54 -0400 Received: by mail-qa0-f45.google.com with SMTP id cm18so2404378qab.32 for ; Thu, 31 Jul 2014 08:07:54 -0700 (PDT) Sender: Paolo Bonzini Message-ID: <53DA5BC6.7040404@redhat.com> Date: Thu, 31 Jul 2014 17:07:50 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <53D93EF9.3020505@windriver.com> <20140731093224.GB14001@redhat.com> <53DA5675.6010607@windriver.com> In-Reply-To: <53DA5675.6010607@windriver.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] questions about host side of virtio-serial List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Chris Friesen , "Richard W.M. Jones" Cc: Amit Shah , "qemu-devel@nongnu.org" Il 31/07/2014 16:45, Chris Friesen ha scritto: > With qemu 1.4.2 it blocks or returns EAGAIN if the guest tries to write > to the char device, but the behaviour is different if the host tries to > write to the unix socket. See 4 below. 1.4.2 is too old. Even CentOS 6's franken-0.12 would be preferrable to such an old release, in particular it had the flow control patches from 1.5.0 backported. Paolo