From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 8B9E16B01BA for ; Mon, 14 Jun 2010 11:46:24 -0400 (EDT) Message-ID: <4C164EA0.30308@redhat.com> Date: Mon, 14 Jun 2010 11:45:36 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH 01/12] tracing, vmscan: Add trace events for kswapd wakeup, sleeping and direct reclaim References: <1276514273-27693-1-git-send-email-mel@csn.ul.ie> <1276514273-27693-2-git-send-email-mel@csn.ul.ie> In-Reply-To: <1276514273-27693-2-git-send-email-mel@csn.ul.ie> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Mel Gorman Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Dave Chinner , Chris Mason , Nick Piggin , Johannes Weiner , Christoph Hellwig , KAMEZAWA Hiroyuki , Andrew Morton List-ID: On 06/14/2010 07:17 AM, Mel Gorman wrote: > This patch adds two trace events for kswapd waking up and going asleep for > the purposes of tracking kswapd activity and two trace events for direct > reclaim beginning and ending. The information can be used to work out how > much time a process or the system is spending on the reclamation of pages > and in the case of direct reclaim, how many pages were reclaimed for that > process. High frequency triggering of these events could point to memory > pressure problems. > > Signed-off-by: Mel Gorman Acked-by: Rik van Riel -- All rights reversed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org