From owner-cvs-src@FreeBSD.ORG Thu Apr 13 16:44:52 2006 Return-Path: X-Original-To: cvs-src@FreeBSD.org Delivered-To: cvs-src@FreeBSD.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5791F16A401; Thu, 13 Apr 2006 16:44:52 +0000 (UTC) (envelope-from imp@bsdimp.com) Received: from harmony.bsdimp.com (vc4-2-0-87.dsl.netrack.net [199.45.160.85]) by mx1.FreeBSD.org (Postfix) with ESMTP id E723743D49; Thu, 13 Apr 2006 16:44:51 +0000 (GMT) (envelope-from imp@bsdimp.com) Received: from localhost (localhost.village.org [127.0.0.1] (may be forged)) by harmony.bsdimp.com (8.13.4/8.13.4) with ESMTP id k3DGgcFw098462; Thu, 13 Apr 2006 10:42:38 -0600 (MDT) (envelope-from imp@bsdimp.com) Date: Thu, 13 Apr 2006 10:42:49 -0600 (MDT) Message-Id: <20060413.104249.18309735.imp@bsdimp.com> To: sam@errno.com From: "M. Warner Losh" In-Reply-To: <443E7B68.50807@errno.com> References: <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE> <20060412.160552.35796990.imp@bsdimp.com> <443E7B68.50807@errno.com> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org, brueffer@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/pccbb pccbb.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Apr 2006 16:44:52 -0000 In message: <443E7B68.50807@errno.com> Sam Leffler writes: : M. Warner Losh wrote: : > In message: <20060412212843.GH1258@haakonia.hitnet.RWTH-Aachen.DE> : > Christian Brueffer writes: : > : On Thu, Mar 30, 2006 at 04:25:45AM +0000, Warner Losh wrote: : > : > imp 2006-03-30 04:25:45 UTC : > : > : > : > FreeBSD src repository : > : > : > : > Modified files: : > : > sys/dev/pccbb pccbb.c : > : > Log: : > : > On some laptops, under very high loads, the socket event register read : > : > in the ISR doesn't read the actual socket event register, but instead : > : > reads garbage (usually 0xffffffff, but other times other things). : > : > This totally violates the PCI spec, but happens rarely enough that a : > : > workaround is in order. This adds one test when we have a real : > : > interrupt to service (which is very rare), and doesn't affect the : > : > usualy 'nothing to see here' case at all. : > : > : > : > Problem reported by many, but sam@ gave me this workaround after : > : > diagnosing the problem. : > : > : > : : > : This breaks pccard/cardbus support on my Thinkpad T41p (confirmed by : > : backing this change out). With this change, I just get an "Interrupt : > : storm detected on irq 5; throttling" message. : > : : > : What kind of debug info can I provide? : > : > A Thinkpad T41p. :-) : > : > Failing that, can you set hw.cbb.debug=1 and provide me with the : > output. : : We should just back this out until we can resolve the issue. For other : folks: the change was originally done for an hp nx6125 laptop where : running a wireless card in monitor mode would cause spontaneous : interface detach's under load. It sounds like the root cause is elsewhere. OK. Warner