From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Hajnoczi Subject: Re: FAQ on linux-kvm.org has broken link Date: Tue, 6 Aug 2013 10:13:58 +0200 Message-ID: <20130806081358.GH27705@stefanha-thinkpad.redhat.com> References: <20130730011852.GC27878@belle.intranet.vanheusden.com> <20130730122546.GA7239@stefanha-thinkpad.redhat.com> <20130730204514.GA9179@belle.intranet.vanheusden.com> <20130731084624.GA20915@stefanha-thinkpad.muc.redhat.com> <20130802113753.GA8801@belle.intranet.vanheusden.com> <20130802180657.GB8801@belle.intranet.vanheusden.com> <20130805113154.GD14592@stefanha-thinkpad.muc.redhat.com> <20130805205944.GP8801@belle.intranet.vanheusden.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm To: folkert Return-path: Received: from mail-wg0-f43.google.com ([74.125.82.43]:62451 "EHLO mail-wg0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752265Ab3HFIOD (ORCPT ); Tue, 6 Aug 2013 04:14:03 -0400 Received: by mail-wg0-f43.google.com with SMTP id z12so75215wgg.10 for ; Tue, 06 Aug 2013 01:14:01 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20130805205944.GP8801@belle.intranet.vanheusden.com> Sender: kvm-owner@vger.kernel.org List-ID: On Mon, Aug 05, 2013 at 10:59:45PM +0200, folkert wrote: > > Two approaches to get closer to the source of the problem: > > 1. Try the latest vanilla kernel on the host (Linux 3.10.5). This way > > you can rule out fixed bugs in vhost_net or tap. > > 2. Get the system into the bad state and then do some deeper. Start > > with outgoing ping, instrument guest driver and host vhost_net > > functions to see what the drivers are doing, inspect the transmit > > vring, etc. > > > > #1 is probably the best next step. If it fails and you still have time > > to work on a solution we can start digging deeper with #2. > > I can upgrade now to 3.10.3 as that is the current version in debian. Sounds good. That way you'll also have access to the latest perf for instrumenting vhost_net if it still fails. Stefan