From owner-freebsd-alpha Wed May 15 20:55:51 2002 Delivered-To: freebsd-alpha@freebsd.org Received: from mail.speakeasy.net (mail17.speakeasy.net [216.254.0.217]) by hub.freebsd.org (Postfix) with ESMTP id BD4E137B40B for ; Wed, 15 May 2002 20:55:47 -0700 (PDT) Received: (qmail 18003 invoked from network); 16 May 2002 03:55:46 -0000 Received: from unknown (HELO server.baldwin.cx) ([216.27.160.63]) (envelope-sender ) by mail17.speakeasy.net (qmail-ldap-1.03) with DES-CBC3-SHA encrypted SMTP for ; 16 May 2002 03:55:46 -0000 Received: from laptop.baldwin.cx (laptop.baldwin.cx [192.168.0.4]) by server.baldwin.cx (8.11.6/8.11.6) with ESMTP id g4G3tjF68957; Wed, 15 May 2002 23:55:45 -0400 (EDT) (envelope-from jhb@FreeBSD.org) Message-ID: X-Mailer: XFMail 1.5.2 on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <20020515204816.B302@xor.obsecurity.org> Date: Wed, 15 May 2002 23:55:35 -0400 (EDT) From: John Baldwin To: Kris Kennaway Subject: Re: memory management fault during netbooting on 4.6-PRERELEASE Cc: Andrew Gallatin , alpha@FreeBSD.org Sender: owner-freebsd-alpha@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On 16-May-2002 Kris Kennaway wrote: > On Wed, May 15, 2002 at 11:40:48PM -0400, John Baldwin wrote: > >> > (gdb) l *0xfffffc000056bcc0 >> > No source file for address 0xfffffc000056bcc0. >> >> Ok, can you do a nm kernel.debug | sort | less and find the two >> symbols that that address falls between? > > fffffc000056bca0 t swi_net > fffffc000056bd20 T do_sir Ok, swi_net() looks like so (alpha/alpha/iplfuncs.c) static void swi_net() { u_int32_t bits = atomic_readandclear(&netisr); int i; for (i = 0; i < 32; i++) { if (bits & 1) netisrs[i](); bits >>= 1; } } My guess then is that we tried to execute a netisr() that was NULL. Is this reproducible? If so, you could try adding a a hack to not execute the isr if it's null, i.e.: if ((bits & 1) != 0 && netisrs[i] != NULL) netisrs[i](); > Kris -- John Baldwin <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message