From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261517AbVGYGqD (ORCPT ); Mon, 25 Jul 2005 02:46:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261604AbVGYGpy (ORCPT ); Mon, 25 Jul 2005 02:45:54 -0400 Received: from smtp.osdl.org ([65.172.181.4]:18395 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S261218AbVGYGns (ORCPT ); Mon, 25 Jul 2005 02:43:48 -0400 Date: Sun, 24 Jul 2005 23:42:38 -0700 From: Andrew Morton To: Richard Purdie Cc: dirk@opfer-online.de, linux-kernel@vger.kernel.org Subject: Re: 2.6.13-rc3-mm1 Message-Id: <20050724234238.2141e828.akpm@osdl.org> In-Reply-To: <1122222021.7585.64.camel@localhost.localdomain> References: <20050715013653.36006990.akpm@osdl.org> <1122222021.7585.64.camel@localhost.localdomain> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Richard Purdie wrote: > > On Fri, 2005-07-15 at 01:36 -0700, Andrew Morton wrote: > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc3/2.6.13-rc3-mm1/ > > On the Zaurus I'm seeing a couple of false "BUG: soft lockup detected on > CPU#0!" reports. These didn't show under 2.6.12-mm1 which was the last > -mm kernel I tested. softlockup.c seems identical between these versions > so it looks like some other change has caused this to appear... > > Both of these are triggered from the nand driver. The functions > concerned (nand_wait_ready and nand_read_buf) are known to be slow (they > wait on hardware). OK, thanks. We can stick a touch_softlockup_watchdog() into those two functions to tell them that we know what we're doing. If you have time to write-and-test a patch then please do so - otherwise I'll take an untested shot at it.