From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 19 Nov 2007 18:48:41 +0000 (GMT) Received: from localhost.localdomain ([127.0.0.1]:61155 "EHLO dl5rb.ham-radio-op.net") by ftp.linux-mips.org with ESMTP id S20033904AbXKSSsj (ORCPT ); Mon, 19 Nov 2007 18:48:39 +0000 Received: from denk.linux-mips.net (denk.linux-mips.net [127.0.0.1]) by dl5rb.ham-radio-op.net (8.14.1/8.13.8) with ESMTP id lAJImcbF014446; Mon, 19 Nov 2007 18:48:38 GMT Received: (from ralf@localhost) by denk.linux-mips.net (8.14.1/8.14.1/Submit) id lAJImbnH014445; Mon, 19 Nov 2007 18:48:37 GMT Date: Mon, 19 Nov 2007 18:48:37 +0000 From: Ralf Baechle To: Kaz Kylheku Cc: linux-mips@linux-mips.org Subject: Re: futex_wake_op deadlock? Message-ID: <20071119184837.GA12287@linux-mips.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17 (2007-11-01) Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 17531 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: ralf@linux-mips.org Precedence: bulk X-list: linux-mips On Fri, Nov 16, 2007 at 03:52:47PM -0800, Kaz Kylheku wrote: > From time to time, on 2.6.17.7, I see a deadlock situation go off. The > soft lockup tick occurs in the middle of do_futex, which is heavily > inlined. The system is actually hosed; it's not one of those > recoverable CPU busy situations that can sometimes trigger the lockup > detector. Can you reproduce thing hang also if you're not running in a binary compat mode, that is either running o32 binaries on a 32-bit kernel or 64-bit binaries on a 64-bit kernel? Ralf