linux-kernel - Re: [PATCH] vmscan: make kswapd use a correct order

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Message-Id: <20101209141317.60d14fb5.akpm@linux-foundation.org>
Date:	Thu, 9 Dec 2010 14:13:17 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	Shaohua Li <shaohua.li@...el.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH] vmscan: make kswapd use a correct order

On Fri,  3 Dec 2010 01:00:49 +0900
Minchan Kim <minchan.kim@...il.com> wrote:

> +static bool kswapd_try_to_sleep(pg_data_t *pgdat, int order)

OT: kswapd_try_to_sleep() does a
trace_mm_vmscan_kswapd_sleep(pgdat->node_id) if it sleeps for a long
time, but doesn't trace anything at all if it does a short sleep. 
Where's the sense in that?
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