From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756398AbZEACon (ORCPT ); Thu, 30 Apr 2009 22:44:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753250AbZEACo1 (ORCPT ); Thu, 30 Apr 2009 22:44:27 -0400 Received: from mail-ew0-f176.google.com ([209.85.219.176]:47259 "EHLO mail-ew0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752187AbZEACo0 (ORCPT ); Thu, 30 Apr 2009 22:44:26 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer; b=vM7u3rrrzWPuy8t8FdF0A7EG5wLb4LQYkYLfmVptny8o7KIDW2dYuA+YOIW9Sg/4Sn DnEwJex1uJ3fEg7SAJlP+IN5+Q0+Qhy+5JyLr8ULV/T1tDtX5DLCH/9ML0qPNnMsRdrs dwCzHy8rhE3SVG3G55A/tkGv6nzpkhD+QkfAs= From: Frederic Weisbecker To: Ingo Molnar Cc: LKML , Frederic Weisbecker , Jeff Mahoney , ReiserFS Development List , Chris Mason , Alexander Beregalov , Alessio Igor Bogani , Jonathan Corbet , Alexander Viro Subject: [PATCH 0/6] kill-the-BKL/reiserfs3: performance improvements, faster than Bkl based scheme Date: Fri, 1 May 2009 04:44:16 +0200 Message-Id: <1241145862-21700-1-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.6.2.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This reiserfs patchset applies against latest tip:core/kill-the-BKL It adds various explicit write lock releases on specific sleeping sections. A performance test with dbench on UP with 100 processus during 100 seconds gives the following results: Locking Throughput Bkl: 11.2587 MB/s Write lock/Mutex: 12.5713 MB/s So the new locking scheme makes it 11% faster than with the bkl. It's not possible to compare it on the kill-the-BKL tree because the Bkl is not anymore a Bkl inside but a plain Mutex. Instead, you can apply the following equivalent patch against -rc3 to test it: http://www.kernel.org/pub/linux/kernel/people/frederic/reiserfs-kill-the-bkl-full.patch Of course it might eat your data, make you cows produce black milk, bring coffee to your children at 3:00 am, turn the teletubbies song in your mind for seven years long and so... Frederic. The following changes since commit a3a2b793d18bc068b79508e96eba33ae2326f759: Alessio Igor Bogani (1): remove the BKL: remove "BKL auto-drop" assumption from ext3_remount() are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git bkl Frederic Weisbecker (6): kill-the-BKL/reiserfs: release write lock on fs_changed() kill-the-BKL/reiserfs: release the write lock before rescheduling on do_journal_end() kill-the-BKL/reiserfs: release write lock while rescheduling on prepare_for_delete_or_cut() kill-the-BKL/reiserfs: release the write lock inside get_neighbors() kill-the-BKL/reiserfs: release the write lock inside reiserfs_read_bitmap_block() kill-the-BKL/reiserfs: release the write lock on flush_commit_list() fs/reiserfs/bitmap.c | 2 ++ fs/reiserfs/fix_node.c | 4 ++++ fs/reiserfs/journal.c | 9 +++++++-- fs/reiserfs/stree.c | 2 ++ include/linux/reiserfs_fs.h | 8 +++++++- 5 files changed, 22 insertions(+), 3 deletions(-)