From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: tun mq failure Date: Wed, 23 Jan 2013 15:18:45 +0200 Message-ID: <20130123131845.GB18276@redhat.com> References: <20130123100516.GB8108@redhat.com> <20130123110640.GC7005@order.stressinduktion.org> <50FFD2A7.6010402@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org To: Jason Wang Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63758 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752463Ab3AWNOh (ORCPT ); Wed, 23 Jan 2013 08:14:37 -0500 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r0NDEaQH014497 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 23 Jan 2013 08:14:36 -0500 Content-Disposition: inline In-Reply-To: <50FFD2A7.6010402@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, Jan 23, 2013 at 08:08:07PM +0800, Jason Wang wrote: > On 01/23/2013 07:06 PM, Hannes Frederic Sowa wrote: > > On Wed, Jan 23, 2013 at 12:05:16PM +0200, Michael S. Tsirkin wrote: > >> This is when trying to start a VPN using some old openvpn binary so MQ > >> is not set. > >> > >> So > >> 1. I think we should limit allocation of MQ to when MQ flag is set in SETIFF. > >> 2. order 7 allocation is 2^^7 pages - about half a megabyte of contigious > >> memory. This is quite likely to fail. > >> Let's start with a small limit on number of queues, like 8? > >> Then we know it will succeed. > >> Longer term we might want to solve it differently. > > This has been come up before: > > http://thread.gmane.org/gmane.linux.network/255647/focus=255902 > > > > I think a solution to this problem is still outstanding. > > > I draft a patch in the reply of in that thread, but didn't get feedback > from reporter. Yes it's essentialy same. So can you please submit an official patch with proper subject commit log and signature?