From owner-freebsd-bugs@FreeBSD.ORG Wed Jul 21 06:20:01 2010 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A46951065673 for ; Wed, 21 Jul 2010 06:20:01 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 679578FC13 for ; Wed, 21 Jul 2010 06:20:01 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o6L6K1Vu081711 for ; Wed, 21 Jul 2010 06:20:01 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o6L6K1GN081710; Wed, 21 Jul 2010 06:20:01 GMT (envelope-from gnats) Resent-Date: Wed, 21 Jul 2010 06:20:01 GMT Resent-Message-Id: <201007210620.o6L6K1GN081710@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Mike Andrews Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C0AC41065781 for ; Wed, 21 Jul 2010 06:16:10 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id AF0148FC16 for ; Wed, 21 Jul 2010 06:16:10 +0000 (UTC) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id o6L6GAb7006773 for ; Wed, 21 Jul 2010 06:16:10 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id o6L6GAjS006772; Wed, 21 Jul 2010 06:16:10 GMT (envelope-from nobody) Message-Id: <201007210616.o6L6GAjS006772@www.freebsd.org> Date: Wed, 21 Jul 2010 06:16:10 GMT From: Mike Andrews To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/148807: 8.1-RELEASE "panic: sbdrop" and "panic: sbsndptr: sockbuf _ and mbuf _ clashing" under heavy load X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jul 2010 06:20:01 -0000 >Number: 148807 >Category: kern >Synopsis: 8.1-RELEASE "panic: sbdrop" and "panic: sbsndptr: sockbuf _ and mbuf _ clashing" under heavy load >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jul 21 06:20:01 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Mike Andrews >Release: 8.1-RELEASE amd64 >Organization: >Environment: FreeBSD bourbon.fark.com 8.1-RELEASE FreeBSD 8.1-RELEASE #6: Sat Jul 17 18:30:12 EDT 2010 root@beer.int.fark.com:/usr/obj/usr/src/sys/FARK64 amd64 >Description: Under heavy load (i.e. enough to make an 8 GB machine start to swap) I'm seeing multiple (identical) machines panic repeatedly with the above panic messages. The panics go away once load goes down. Also very occasionally seeing "em0: discard frame w/o packet header" before the panics, though not very often. Hardware is five identical Supermicro PDSMI+ systems, Q6600, 8 GB ECC memory. The only references I'm finding to these panics on Google seem to point at either IPv6 or em as potential issues, and we're using both. :) Specifically http://groups.google.com/group/mailing.freebsd.net/browse_thread/thread/28db45413a889411 looks VERY similar. I have not yet tried shutting off IPv6 or at least switching some services back to IPv4. (Our v6 usage is all internal-only.) core.txt.* files are at http://www.bit0.com/tmp/core.txt.20100721.tar.gz I have minidumps as well but as they may contain some proprietary data I'd rather not post 'em online, however I can run whatever kgdb commands are needed to help troubleshoot. :) >How-To-Repeat: See above >Fix: Unknown >Release-Note: >Audit-Trail: >Unformatted: