From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robin Lee Powell Subject: Re: tcpdump locks up kvm host for a while. Date: Thu, 29 Sep 2011 12:07:13 -0700 Message-ID: <20110929190712.GT11528@stodi.digitalkingdom.org> References: <20110928020137.GK21223@stodi.digitalkingdom.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: kvm@vger.kernel.org Return-path: Received: from 173-13-139-236-sfba.hfc.comcastbusiness.net ([173.13.139.236]:35410 "EHLO stodi.digitalkingdom.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753949Ab1I2THN (ORCPT ); Thu, 29 Sep 2011 15:07:13 -0400 Received: from rlpowell by stodi.digitalkingdom.org with local (Exim 4.76) (envelope-from ) id 1R9Lwv-0008V0-3B for kvm@vger.kernel.org; Thu, 29 Sep 2011 12:07:13 -0700 Content-Disposition: inline In-Reply-To: <20110928020137.GK21223@stodi.digitalkingdom.org> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Sep 27, 2011 at 07:01:37PM -0700, Robin Lee Powell wrote: > > I can essentially test this at will, so feel free to ask for > debugging steps. > > My host and VMs are all Fedora 15. > > Every time I run tcpdump on a VM, it hangs for a while. It uses > all available CPU, "virsh list" hangs trying to show it, and I > can't shut it down except by killing the qemu-kvm process. > > After a few minutes, which amount of time seems to be > proportionate to how long it's been since I last ran tcpdump (the > longer it's been, the longer I have to wait) everything goes back > to normal if I don't kill the VM. > > Any idea what's going on there? Nobody else has this problem? How odd. -Robin