From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1N34K1-0002Nj-6d for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:56:01 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1N34Jw-0002HW-7d for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:56:00 -0400 Received: from [199.232.76.173] (port=33993 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1N34Jv-0002HF-U0 for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:55:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:31565) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1N34Jv-0003o8-Dc for qemu-devel@nongnu.org; Wed, 28 Oct 2009 04:55:55 -0400 Message-ID: <4AE80716.3040102@redhat.com> Date: Wed, 28 Oct 2009 10:55:50 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] accidental mistyping of command line kills networking References: <4AE7460D.7050807@us.ibm.com> <4AE761D9.7040401@us.ibm.com> <4AE769A3.9080205@codemonkey.ws> <4AE7E4D6.1000008@redhat.com> <20091028083429.GS29477@redhat.com> In-Reply-To: <20091028083429.GS29477@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gleb Natapov Cc: Beth Kon , qemu-devel On 10/28/2009 10:34 AM, Gleb Natapov wrote: > >> It shouldn't kill networking though. If a guest has two nics >> connected to the same host bridge (a reasonable configuration), and >> then connects these two nics through its own bridge, it creates the >> same sort of loop. If that kills networking, we have a >> guest-initiated DoS (not that the userspace-initiated DoS was much >> better). >> >> > That's what STP is for. > > The guest need not respect it. The host must survive network loopbacks. -- error compiling committee.c: too many arguments to function