| Date | Mon, 14 Jun 2010 12:48:24 -0400 | From | Rik van Riel <> | Subject | Re: [PATCH 03/12] tracing, vmscan: Add trace event when a page is written |
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On 06/14/2010 07:17 AM, Mel Gorman wrote: > This patch adds a trace event for when page reclaim queues a page for IO and > records whether it is synchronous or asynchronous. Excessive synchronous > IO for a process can result in noticeable stalls during direct reclaim. > Excessive IO from page reclaim may indicate that the system is seriously > under provisioned for the amount of dirty pages that exist. > > Signed-off-by: Mel Gorman<mel@csn.ul.ie>
Acked-by: Rik van Riel <riel@redhat.com>
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