From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932505AbYARVNW (ORCPT ); Fri, 18 Jan 2008 16:13:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762361AbYARVNK (ORCPT ); Fri, 18 Jan 2008 16:13:10 -0500 Received: from g1t0026.austin.hp.com ([15.216.28.33]:1318 "EHLO g1t0026.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760745AbYARVNI (ORCPT ); Fri, 18 Jan 2008 16:13:08 -0500 Subject: Re: BUG? 2.6.24-rc*[-mm*] - debugfs subdirs missing on x86_64 From: Lee Schermerhorn To: Greg KH Cc: linux-kernel , Andrew Morton , Jens Axboe , prasanna@in.ibm.com, ananth@in.ibm.com, anil.s.keshavamurthy@intel.com, davem@davemloft.net In-Reply-To: <20080118201926.GA24225@suse.de> References: <1200687154.5043.100.camel@localhost> <20080118201926.GA24225@suse.de> Content-Type: text/plain Organization: HP/OSLO Date: Fri, 18 Jan 2008 16:13:03 -0500 Message-Id: <1200690783.8060.18.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2008-01-18 at 12:19 -0800, Greg KH wrote: > On Fri, Jan 18, 2008 at 03:12:33PM -0500, Lee Schermerhorn wrote: > > I searched around the archives and web and didn't find any reports on > > this [maybe just missed them?], so I MUST be doing something > > wrong/stupid. My config [included] may be the culprit. Apologies for > > the long cc list. I'm copying the kprobes and blktrace maintainers > > [addresses from MAINTAINERS] to verify that they're NOT seeing this > > problem. > > > > Problem: I see no sub-directories below /sys/kernel/debug on x86_64 > > Have you mounted debugfs on /sys/kernel/debug? Try: > mount -t debugfs none /sys/kernel/debug > as root and see if the files are present or not. D'oh! [or something stronger] I KNEW it was something stupid. I thought it strange that there were no reports of something this glaring. That's why I took so long investigating before I finally asked. I've used debugfs+mmtrace on x86_64 in the past and I've had the debugfs mount in my test systems' fstab for so long that I don't even think about it [obviously!]. I moved to a different test system a couple of months ago and apparently brought over an old fstab patch. Sorry for the noise [he says sheepishly]. Lee