linux-kernel - Re: [PATCH 3/4] Count the number of times zone

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Message-Id: <20090610104635.DDA6.A69D9226@jp.fujitsu.com>
Date:	Wed, 10 Jun 2009 10:47:20 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Mel Gorman <mel@....ul.ie>
Cc:	kosaki.motohiro@...fujitsu.com, Rik van Riel <riel@...hat.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	yanmin.zhang@...el.com, Wu Fengguang <fengguang.wu@...el.com>,
	linuxram@...ibm.com, linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/4] Count the number of times zone_reclaim() scans and fails

Hi

I like this patch. thank you mel.

> @@ -2489,6 +2489,10 @@ int zone_reclaim(struct zone *zone, gfp_t gfp_mask, unsigned int order)
>  	ret = __zone_reclaim(zone, gfp_mask, order);
>  	zone_clear_flag(zone, ZONE_RECLAIM_LOCKED);
>  
> +	if (!ret) {
> +		count_vm_events(PGSCAN_ZONERECLAIM_FAILED, 1);
> +	}
> +
>  	return ret;


count_vm_event(PGSCAN_ZONERECLAIM_FAILED)?




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