From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by nz-out-0506.google.com with SMTP id f1so109426nzc for ; Wed, 02 May 2007 05:14:12 -0700 (PDT) Message-ID: <3ae72650705020514m1e36caadtc9d64b5439b0cd03@mail.gmail.com> Date: Wed, 2 May 2007 14:14:11 +0200 From: "Kay Sievers" Subject: Re: 2.6.21-rc7-mm2 crash: Eeek! page_mapcount(page) went negative! (-1) In-Reply-To: <20070502074305.GA7761@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20070425225716.8e9b28ca.akpm@linux-foundation.org> <46338AEB.2070109@imap.cc> <20070428141024.887342bd.akpm@linux-foundation.org> <4636248E.7030309@imap.cc> <20070430112130.b64321d3.akpm@linux-foundation.org> <46364346.6030407@imap.cc> <20070430124638.10611058.akpm@linux-foundation.org> <46383742.9050503@imap.cc> <20070502001000.8460fb31.akpm@linux-foundation.org> <20070502074305.GA7761@suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Greg KH Cc: Andrew Morton , Tilman Schmidt , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Nick Piggin , Hugh Dickins List-ID: On 5/2/07, Greg KH wrote: > On Wed, May 02, 2007 at 12:10:00AM -0700, Andrew Morton wrote: > > On Wed, 02 May 2007 09:01:22 +0200 Tilman Schmidt wrote: > > > > > Am 30.04.2007 21:46 schrieb Andrew Morton: > > > > Not really - everything's tangled up. A bisection search on the > > > > 2.6.21-rc7-mm2 driver tree would be the best bet. > > > > > > And the winner is: > > > > > > gregkh-driver-driver-core-make-uevent-environment-available-in-uevent-file.patch > > > > > > Reverting only that from 2.6.21-rc7-mm2 gives me a working kernel > > > again. > > > > cripes. > > > > +static ssize_t show_uevent(struct device *dev, struct device_attribute *attr, > > + char *buf) > > +{ > > + struct kobject *top_kobj; > > + struct kset *kset; > > + char *envp[32]; > > + char data[PAGE_SIZE]; > > > > That won't work too well with 4k stacks. Yeah, sorry. > Wait, even though this isn't good, it shouldn't have been hit by anyone, > that file used to not be readable, so I doubt userspace would have been > trying to read it... > > Tilman, what version of HAL and udev do you have on your machine? > > Kay, did you get the 'read the uevent file' code already into udev > and/or HAL? Only udevtest uses this at the moment, but that is only used for debugging. It's probably the brain-dead libsysfs, which opens and reads every file in /sys, even when nobody is interested in the data. Thanks, Kay -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org