From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Fitzhardinge Subject: Re: Re: new netfront and occasional receive path lockup Date: Mon, 13 Sep 2010 12:36:19 -0700 Message-ID: <4C8E7D33.7090902@goop.org> References: <87aannepx2.fsf@headboard.unzane.com> <4C8C9594.1010501@goop.org> <87k4mqd1re.fsf@headboard.unzane.com> <87bp82cxwn.fsf@headboard.unzane.com> <877hiqcrxt.fsf@headboard.unzane.com> <8739tecl6i.fsf@headboard.unzane.com> <87vd69bpje.fsf@headboard.unzane.com> <20100913160840.GC2804@reaktio.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20100913160840.GC2804@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: =?ISO-8859-1?Q?Pasi_K=E4rkk=E4inen?= Cc: "Xu, Dongxiao" , "xen-devel@lists.xensource.com" , Gerald Turner List-Id: xen-devel@lists.xenproject.org On 09/13/2010 09:08 AM, Pasi K=E4rkk=E4inen wrote: > On Mon, Sep 13, 2010 at 09:01:57AM -0700, Gerald Turner wrote: >> Gerald Turner writes: >> >>> "Xu, Dongxiao" writes: >>> >>>> Thanks for your detail information. >>>> >>>> Unfortunately I don't have such platform that could launch more than >>>> 10 guests in hand. >>>> >>>> Here is another patch (see attached file) that fix another potential >>>> race. >>>> >>>> Do you have bandwidth to have a try? Thanks in advance! >>>> >>> I built a kernel with your additional patch. >>> >>> I have it running on all 13 domU's with use_smartpoll=3D1. >>> >>> I'll report tomorrow morning whether there were any lockups. >>> >>> FYI, total today I had 6 lockups with use_smartpoll=3D1 and the previ= ous >>> patch. >>> >> Sorry bad news again... >> >> Had 5 lockups within 4 hours. >> >> Then I restarted all domUs with use_smartpoll=3D0 and haven't had any >> lockups in 7 hours. >> > I think we should default xen/stable-2.6.32.x to use_smartpoll=3D0 for = the time being > until this is sorted out.. Agreed. J