From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Tim Sander" Subject: Re: infinite spin in RT when booting with DHCP on Date: Mon, 6 Feb 2012 15:49:57 +0100 Message-ID: <201202061549.57382.tim.sander@hbm.com> References: <4F292FE0.7090302@digi.com> <20120202201336.GF25594@pengutronix.de> <1328218466.5882.119.camel@gandalf.stny.rr.com> Mime-Version: 1.0 Content-Type: text/Plain; charset=ISO-8859-15 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: =?ISO-8859-15?Q?Uwe_Kleine-K=F6nig?= , "Hector Palacios" , , , To: "Steven Rostedt" Return-path: Received: from relay.medianet-world.de ([213.157.0.172]:14934 "HELO relay.medianet-world.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753135Ab2BFOuw convert rfc822-to-8bit (ORCPT ); Mon, 6 Feb 2012 09:50:52 -0500 Content-Class: urn:content-classes:message In-reply-to: <1328218466.5882.119.camel@gandalf.stny.rr.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hi=20 Am Donnerstag, 2. Februar 2012, 22:34:26 schrieb Steven Rostedt: > On Thu, 2012-02-02 at 21:13 +0100, Uwe Kleine-K=F6nig wrote: > > enabled the ksoftirq is also running wild with 3.0-rt. This also ha= ppens > > when I fail to reproduce that on a pcm043 machine using 3.0.18-rt34= =2E Can > > you provide me your config. Does the problem occur on every boot fo= r > > you? If not, how often do I need to reboot? >=20 > Note, you also said (on IRC) that you boot off this card via NFS root= =2E > I'm not sure Tim has the same setup, and that may be a big difference= in > how this bug comes about. As i said, it is not to easy to trigger. I needed to start connmand and= =20 dhclient in parallel and then do "ifconfig eth0 up/down" to trigger it=20 sometimes. It is easier to trigger when the ubifs background task is ru= nning.=20 But that apears normal "behaviour" for a race condition like this. =20 > It's a race issue, and it may require enabling the network interface > after the system is up and running. Yep, it's "hard" to hit this error on the first time. We have this erro= r for=20 more than a year now, and it only came to my attention after we had our= qa=20 test rack up and running. Best regards Tim Hottinger Baldwin Messtechnik GmbH, Im Tiefen See 45, 64293 Darmstadt, = Germany | www.hbm.com=20 Registered as GmbH (German limited liability corporation) in the commer= cial register at the local court of Darmstadt, HRB 1147 =20 Company domiciled in Darmstadt | CEO: Andreas Huellhorst | Chairman of = the board: James Charles Webster Als Gesellschaft mit beschraenkter Haftung eingetragen im Handelsregist= er des Amtsgerichts Darmstadt unter HRB 1147=20 Sitz der Gesellschaft: Darmstadt | Geschaeftsfuehrung: Andreas Huellhor= st | Aufsichtsratsvorsitzender: James Charles Webster The information in this email is confidential. It is intended solely fo= r the addressee. If you are not the intended recipient, please let me k= now and delete this email. Die in dieser E-Mail enthaltene Information ist vertraulich und ledigli= ch f=FCr den Empfaenger bestimmt. Sollten Sie nicht der eigentliche Emp= faenger sein, informieren Sie mich bitte kurz und loeschen diese E-Mail= =2E -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html