From owner-freebsd-ppc@FreeBSD.ORG Thu May 22 07:51:34 2014 Return-Path: Delivered-To: freebsd-ppc@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id CF4CF9A8 for ; Thu, 22 May 2014 07:51:34 +0000 (UTC) Received: from mx.nsu.ru (mx.nsu.ru [84.237.50.39]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 772D224C6 for ; Thu, 22 May 2014 07:51:33 +0000 (UTC) Received: from regency.nsu.ru ([193.124.210.26]) by mx.nsu.ru with esmtp (Exim 4.72) (envelope-from ) id 1WnNmW-0007a3-EF; Thu, 22 May 2014 14:51:21 +0700 Received: from regency.nsu.ru (localhost [127.0.0.1]) by regency.nsu.ru (8.14.2/8.14.2) with ESMTP id s4M7p9xr022281; Thu, 22 May 2014 14:51:19 +0700 (NOVT) (envelope-from danfe@regency.nsu.ru) Received: (from danfe@localhost) by regency.nsu.ru (8.14.2/8.14.2/Submit) id s4M7p4TI022250; Thu, 22 May 2014 14:51:04 +0700 (NOVT) (envelope-from danfe) Date: Thu, 22 May 2014 14:51:04 +0700 From: Alexey Dokuchaev To: Justin Hibbits Subject: Re: DSI when in dhclient Message-ID: <20140522075104.GA19283@regency.nsu.ru> References: <20140511175007.721425b1@zhabar.att.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140511175007.721425b1@zhabar.att.net> User-Agent: Mutt/1.4.2.1i X-KLMS-Rule-ID: 1 X-KLMS-Message-Action: clean X-KLMS-AntiSpam-Lua-Profiles: 61504 [May 22 2014] X-KLMS-AntiSpam-Version: 5.3.6 X-KLMS-AntiSpam-Envelope-From: danfe@regency.nsu.ru X-KLMS-AntiSpam-Rate: 0 X-KLMS-AntiSpam-Status: not_detected X-KLMS-AntiSpam-Method: none X-KLMS-AntiSpam-Moebius-Timestamps: 2940635, 2940657, 0 X-KLMS-AntiSpam-Interceptor-Info: scan successful X-KLMS-AntiVirus: Kaspersky Security 8.0 for Linux Mail Server 8.0.0.455, not checked X-KLMS-AntiVirus-Status: NotChecked: not checked, skipped Cc: FreeBSD PowerPC ML X-BeenThere: freebsd-ppc@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Porting FreeBSD to the PowerPC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 May 2014 07:51:34 -0000 On Sun, May 11, 2014 at 05:50:07PM -0700, Justin Hibbits wrote: > Something odd I've been running into lately on 32-bit powerpc, when I > run dhclient on an interface, I get a Data Storage Interrupt dropping > me to ddb. It happens when dhclient is spawning /usr/sbin/arp, and I > don't know why. I can write directly to the page it's trying to write > into. [...] Does anyone else see this? I sometimes get dropped to ddb(4) due to DSI on Mac mini G4 but unrelated to dhclient(8); however, I have a question about kernel debugging, so I'd chime in. :) While at db> prompt, I can see the backtrace and even "call doadump" to save some 37MB of memory. On subsequent reboot, usual set of files under /var/crash is generated, but running kgdb(1) on them for postmortem shows nothing except couple of question marks. Is crashdump saving/reading is broken on PowerPC these days, or I'm just doing it wrongly? ./danfe