From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35469) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZC11P-0007Q2-7R for qemu-devel@nongnu.org; Mon, 06 Jul 2015 03:40:59 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZC11M-0002Gs-20 for qemu-devel@nongnu.org; Mon, 06 Jul 2015 03:40:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35107) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZC11L-0002Gc-SS for qemu-devel@nongnu.org; Mon, 06 Jul 2015 03:40:55 -0400 Date: Mon, 6 Jul 2015 15:40:52 +0800 From: Fam Zheng Message-ID: <20150706074052.GD9051@ad.nay.redhat.com> References: <20150706015557.GA8444@ad.nay.redhat.com> <20150706073618.GC9051@ad.nay.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150706073618.GC9051@ad.nay.redhat.com> Subject: Re: [Qemu-devel] TAP network breaks after debugger break-in List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Max Filippov Cc: qemu-devel , Stefan Hajnoczi On Mon, 07/06 15:36, Fam Zheng wrote: > On Mon, 07/06 10:27, Max Filippov wrote: > > On Mon, Jul 6, 2015 at 4:55 AM, Fam Zheng wrote: > > > On Sat, 07/04 10:47, Max Filippov wrote: > > >> Hello, > > >> > > >> I'm using QEMU with TAP network and after the commit > > >> 0a2df857a703 "Merge remote-tracking branch > > >> 'remotes/stefanha/tags/net-pull-request' into staging" > > >> I've noticed that activation of debugger connected to QEMU's > > >> gdbstub during network I/O almost always breaks network > > >> connection: network stops working completely after return > > >> from the debugger. > > >> > > >> Stefan, Fam, any hint on where to start debugging it? > > >> > > > > > > Which NIC are you using? > > > > opencores_eth. > > > > Does reverting a90a7425cf592a3afeff3eaf32f543b83050ee5c work? > Sorry, there are dependencies, I should say "bisect between a90a7425cf5 and a90a7425cf5^" :) Fam