From: Johannes Weiner <hannes@cmpxchg.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>,
Wu Fengguang <fengguang.wu@intel.com>, Jan Kara <jack@suse.cz>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] writeback: Account for time spent congestion_waited
Date: Thu, 26 Aug 2010 20:10:50 +0200 [thread overview]
Message-ID: <20100826181050.GA6805@cmpxchg.org> (raw)
In-Reply-To: <1282835656-5638-2-git-send-email-mel@csn.ul.ie>
On Thu, Aug 26, 2010 at 04:14:14PM +0100, Mel Gorman wrote:
> There is strong evidence to indicate a lot of time is being spent in
> congestion_wait(), some of it unnecessarily. This patch adds a
> tracepoint for congestion_wait to record when congestion_wait() occurred
> and how long was spent.
>
> Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
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next prev parent reply other threads:[~2010-08-26 18:10 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-26 15:14 [RFC PATCH 0/3] Do not wait the full timeout on congestion_wait when there is no congestion Mel Gorman
2010-08-26 15:14 ` [PATCH 1/3] writeback: Account for time spent congestion_waited Mel Gorman
2010-08-26 17:23 ` Minchan Kim
2010-08-26 18:10 ` Johannes Weiner [this message]
2010-08-26 15:14 ` [PATCH 2/3] writeback: Record if the congestion was unnecessary Mel Gorman
2010-08-26 17:35 ` Minchan Kim
2010-08-26 17:41 ` Mel Gorman
2010-08-26 18:29 ` Johannes Weiner
2010-08-26 20:31 ` Mel Gorman
2010-08-27 2:12 ` Shaohua Li
2010-08-27 9:20 ` Mel Gorman
2010-08-27 8:16 ` Johannes Weiner
2010-08-27 9:24 ` Mel Gorman
2010-08-30 13:19 ` Johannes Weiner
2010-08-31 15:02 ` Mel Gorman
2010-09-02 15:49 ` Johannes Weiner
2010-09-02 18:28 ` Mel Gorman
2010-08-29 16:03 ` Minchan Kim
2010-08-26 15:14 ` [PATCH 3/3] writeback: Do not congestion sleep when there are no congested BDIs Mel Gorman
2010-08-26 17:38 ` Minchan Kim
2010-08-26 17:42 ` Mel Gorman
2010-08-26 18:17 ` Johannes Weiner
2010-08-26 20:23 ` Mel Gorman
2010-08-27 1:11 ` Wu Fengguang
2010-08-27 9:34 ` Mel Gorman
2010-08-27 1:42 ` Wu Fengguang
2010-08-27 9:37 ` Mel Gorman
2010-08-27 5:13 ` Dave Chinner
2010-08-27 9:33 ` Mel Gorman
2010-08-26 17:20 ` [RFC PATCH 0/3] Do not wait the full timeout on congestion_wait when there is no congestion Minchan Kim
2010-08-26 17:31 ` Mel Gorman
2010-08-26 17:50 ` Minchan Kim
2010-08-27 1:21 ` Wu Fengguang
2010-08-27 1:41 ` Minchan Kim
2010-08-27 1:50 ` Wu Fengguang
2010-08-27 2:02 ` Minchan Kim
2010-08-27 4:34 ` Wu Fengguang
2010-08-27 9:38 ` Mel Gorman
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