From: Marco Stornelli Subject: [PATCH 0/8] remove lock and unlock super Date: Thu, 16 Aug 2012 11:59:19 +0200 Message-ID: <502CC477.4060005@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: bharrosh@panasas.com, bhalevy@tonian.com, jack@suse.cz, Andrew Morton , adilger.kernel@dilger.ca, tytso@mit.edu, hirofumi@mail.parknet.co.jp, mikulas@artax.karlin.mff.cuni.cz, Al Viro , hch@infradead.org, dushistov@mail.ru, osd-dev@open-osd.org, Linux Kernel , linux-ext4@vger.kernel.org, Linux FS Devel Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Hi all, I'm trying to remove the functions lock_super/unlock_super and to push the lock into each single fs. Currently these fs use these functions: ext3, ext4, fat, hpfs, exofs, sysv, ufs. At the moment I used the more conservative approach, I created a new mutex s_lock in the private sb info for each fs, so nothing change but a couple of notes: 1) exofs/hpfs: they use lock_super only in one function so the lock seems completely not needed and I removed it, do you see collateral effect? 2) fat/ufs: they have already got functions to lock the fs with a mutex, I don't know at the moment if a general review of the code can give us the possibility to "merge" the locks. Bugs, comments, review are welcome especially from fs maintainers. Maybe this work can be a first cleaning, after that each fs can adjust its lock policy. The patch is against 3.6-rc1. Marco