From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o4PAqToY242715 for ; Tue, 25 May 2010 05:52:29 -0500 Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E972236D262 for ; Tue, 25 May 2010 03:54:50 -0700 (PDT) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id DTAJZDC8TeIhR5ZS for ; Tue, 25 May 2010 03:54:50 -0700 (PDT) From: Dave Chinner Subject: [PATCH 0/6] writeback: tracing and fixes Date: Tue, 25 May 2010 20:54:06 +1000 Message-Id: <1274784852-30502-1-git-send-email-david@fromorbit.com> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, jens.axboe@oracle.com, linux-ext4@vger.kernel.org, tytso@mit.edu, xfs@oss.sgi.com This series contains the initial writeback tracing patches from Jens, as well as the extensions I added to provide visibility into writeback control structures as the are used by the writeback code. The visibility given is sufficient to understand what is happening in the writeback path - what path is writing data, what path is blocking on congestion, etc, and to determine the differences in behaviour for different sync modes and calling contexts. This tracing really needs to be integrated into mainline so that anyone can improve the tracing as they use it to track down problems in our convoluted writeback paths. The remaining patches are fixes to problems that the new tracing highlighted. Version 2: - included ext4 write_cache_pages separation patch from Ted Ts'o. - moved CREATE_TRACE_POINTS into fs-writeback.c as suggested by Christoph Hellwig. - moved include of trace/events/writeback.h until after structure definitions in fs-writeback.c - manually revert changes made to write_cache_pages() in 17bc6c30cf6bfffd816bdc53682dd46fc34a2cf4 that caused the regression. This restores the convention that if the fs writes back more than a single page, it subtracts (nr_written - 1) from wbc->nr_to_write, as suggested by Andrew Morton. - added patch to prevent sync from looping in write_cache_pages chasing a moving tail when an appending write workload is running concurrently with sync. _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs