From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Hartkopp Subject: Re: sja1000 interrupt problem Date: Sat, 21 Dec 2013 14:12:32 +0100 Message-ID: <52B593C0.1010004@hartkopp.net> References: <333c0fd4238558062478212eb0704b04@grandegger.com> <52A71B6C.3050600@hartkopp.net> <8e5f03acb59e16a0ebcd31499a533f15@grandegger.com> <52A73BB1.7070701@hartkopp.net> <52A783B2.5020002@grandegger.com> <52A89A0A.7010803@hartkopp.net> <52A8BC94.6010805@grandegger.com> <52A953F3.3000605@hartkopp.net> <52A9F491.3060406@hartkopp.net> <52AA3F16.3070309@grandegger.com> <52AAD5A9.5030607@hartkopp.net> <52AADC61.6010807@pengutronix.de> <52AB345A.6020203@hartkopp.net> <5 2AB407B.4040700@hartkopp.net> <52AB78BE.6010905@hartkopp.net> <52AC2A0A.1040201@hartkopp.net> <52B55184.901@grandegger.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mo-p00-ob.rzone.de ([81.169.146.160]:32741 "EHLO mo-p00-ob.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752860Ab3LUNMf (ORCPT ); Sat, 21 Dec 2013 08:12:35 -0500 In-Reply-To: <52B55184.901@grandegger.com> Sender: linux-can-owner@vger.kernel.org List-ID: To: Wolfgang Grandegger Cc: Austin Schuh , Pavel Pisa , Marc Kleine-Budde , linux-can@vger.kernel.org On 21.12.2013 09:29, Wolfgang Grandegger wrote: > Hi Austin, > > On 12/21/2013 12:13 AM, Austin Schuh wrote: >> I have applied the fix proposed in https://lkml.org/lkml/2013/3/7/222 >> for the note_interrupt function right now, and will run a test this >> weekend to see if it fixes it for sure. I am now consistently seeing >> only 1 / 100000 of the IRQ handler calls being counted as unhandled, >> which is a lot better. > > The patch confirms our observations and I was already thinking of > reporting it on the Linux-RT mailing list (or directly to Thomas). Well, > next time I will hesitate less. > :-) I have a spurious problem with my USB on my i7 Laptop with Intel graphics when my 8 year old mouse is attached at boot time. I'll test this patch on the latest 3.13-rc4 too. Maybe this non-deterministic issue is fixed also. Best regards, Oliver