From mboxrd@z Thu Jan 1 00:00:00 1970 From: folkert Subject: Re: FAQ on linux-kvm.org has broken link Date: Tue, 3 Sep 2013 19:03:10 +0200 Message-ID: <20130903170309.GL8115@belle.intranet.vanheusden.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> <20130806081358.GH27705@stefanha-thinkpad.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm To: Stefan Hajnoczi Return-path: Received: from keetweej.vanheusden.com ([80.101.105.103]:45575 "EHLO keetweej.vanheusden.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754499Ab3ICRDN (ORCPT ); Tue, 3 Sep 2013 13:03:13 -0400 Content-Disposition: inline In-Reply-To: <20130806081358.GH27705@stefanha-thinkpad.redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: > > > 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. It seems some of perf is in the debian kernel and some isn't. So I have to request them to include that. That might take a while. I have a feeling but I did not write it down so I'm not 100% sure that this problem mosly happens (starts at) 18:30 and also past 00:00. That would make one say: then the problem is with that vm. I don't think it is also at least one other vm/guest has this problem. Only very very much less than this problem vm. I'm going to make a list for when it happens. Folkert van Heusden -- Feeling generous? -> http://www.vanheusden.com/wishlist.php ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com