Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756443AbZCXIRE (ORCPT ); Tue, 24 Mar 2009 04:17:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752151AbZCXIQr (ORCPT ); Tue, 24 Mar 2009 04:16:47 -0400 Received: from vsmtp02.dti.ne.jp ([202.216.231.137]:49086 "EHLO vsmtp02.dti.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752123AbZCXIQq (ORCPT ); Tue, 24 Mar 2009 04:16:46 -0400 From: hooanon05@yahoo.co.jp Subject: Q. DEBUG_FS and SYSFS config (Re: [RFC Aufs2 #3 2/2] split 'xino' entry under sysfs) To: Greg KH Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org In-Reply-To: <20090320054437.GC3993@kroah.com> References: <1237439565-25039-1-git-send-email-hooanon05@yahoo.co.jp> <1237439565-25039-3-git-send-email-hooanon05@yahoo.co.jp> <20090320004539.GF18781@kroah.com> <3934.1237515949@jrobl> <20090320024249.GA19989@kroah.com> <4443.1237517709@jrobl> <20090320030608.GA2638@kroah.com> <5142.1237521581@jrobl> <20090320041811.GA3352@kroah.com> <6218.1237526149@jrobl> <20090320054437.GC3993@kroah.com> Date: Tue, 24 Mar 2009 17:16:40 +0900 Message-ID: <2778.1237882600@jrobl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1604 Lines: 53 Greg KH: > No one disables sysfs that I know of. Heck, my phone enables sysfs... > > > Addition to set limit, there is one more reason to adopt seq_file. > > Because the printed string is a path, it may contain unprintable > > characters. seq_file has a good interface seq_path() which supports > > escaping such characters. > > That is true. Ok, let's see the final result and I'll be glad to look > at it. Hi Greg, Currently I am testing locally about new aufs entries under debugfs, and I found a strange issue about configuration. First, configure "normaly". General setup [ ] Configure standard kernel features (for small systems) ---> $ egrep -i '(sysfs|debug_fs)' .config CONFIG_SYSFS_DEPRECATED=y CONFIG_SYSFS_DEPRECATED_V2=y CONFIG_SYSFS=y CONFIG_DEBUG_FS=y # CONFIG_FAULT_INJECTION_DEBUG_FS is not set Next, enable EMBEDED, and then disable SYSFS. General setup [*] Configure standard kernel features (for small systems) ---> File systems Pseudo filesystems ---> [ ] sysfs file system support $ egrep -i '(sysfs|debug_fs)' .config # CONFIG_SYSFS is not set CONFIG_DEBUG_FS=y SYSFS is disabled expectedly, but DEBUG_FS is still enabled, while "depends on SYSFS" is specified for DEBUG_FS. Is this expected behaviour? In other words, can I assume "when DEBUG_FS is enabled, SYSFS must be enabled too" safely? J. R. Okajima -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/