From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Ahern Subject: Re: 2.6.32 guest with paravirt clock enabled hangs on 2.6.37.6 host (w qemu-kvm-0.13.0) Date: Sun, 08 May 2011 21:06:18 -0600 Message-ID: <4DC75A2A.70406@gmail.com> References: <20110508183303.GA7918@nik-comp.lan> <4DC6E6C4.4030103@msgid.tls.msk.ru> <20110508190637.GB7918@nik-comp.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Michael Tokarev , kvm@vger.kernel.org To: Nikola Ciprich Return-path: Received: from mail-pv0-f174.google.com ([74.125.83.174]:41905 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751565Ab1EIDGd (ORCPT ); Sun, 8 May 2011 23:06:33 -0400 Received: by pvg12 with SMTP id 12so2169691pvg.19 for ; Sun, 08 May 2011 20:06:32 -0700 (PDT) In-Reply-To: <20110508190637.GB7918@nik-comp.lan> Sender: kvm-owner@vger.kernel.org List-ID: On 05/08/11 13:06, Nikola Ciprich wrote: > OK, > I see.. the problem is, that I'm trying to hunt down bug causing hangs > when 2.6.32 guests try to run tcpdump - this seems to be reproducible even on latest 2.6.32.x, and seems like it depends on kvm-clock.. > So I was thinking about bisecting between 2.6.32 and latest git which doesn't seem to suffer this problem but hitting another (different) problem in 2.6.32 complicates thinks a bit :( > If somebody would have some hint on how to proceed, I'd be more then grateful.. > cheers Have you tried enabling gdbserver in the qemu monitor and then attaching gdb to the guest once it hangs? David