linux-kernel - Re: [PATCH 2/4] Do not unconditionally treat zones that fail zone

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Message-Id: <20090610104935.DDA9.A69D9226@jp.fujitsu.com>
Date:	Wed, 10 Jun 2009 10:52:14 +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 2/4] Do not unconditionally treat zones that fail zone_reclaim() as full

>  			mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
> -			if (!zone_watermark_ok(zone, order, mark,
> -				    classzone_idx, alloc_flags)) {
> -				if (!zone_reclaim_mode ||
> -				    !zone_reclaim(zone, gfp_mask, order))
> +			if (zone_watermark_ok(zone, order, mark,
> +				    classzone_idx, alloc_flags))
> +				goto try_this_zone;
> +
> +			if (zone_reclaim_mode == 0)
> +				goto this_zone_full;
> +
> +			ret = zone_reclaim(zone, gfp_mask, order);
> +			switch (ret) {
> +			case ZONE_RECLAIM_NOSCAN:
> +				/* did not scan */
> +				goto try_next_zone;
> +			case ZONE_RECLAIM_FULL:
> +				/* scanned but unreclaimable */
> +				goto this_zone_full;
> +			default:
> +				/* did we reclaim enough */
> +				if (!zone_watermark_ok(zone, order, mark,
> +						classzone_idx, alloc_flags))
>  					goto this_zone_full;

ok, this version's change are minimal than previous.
I'm not afraid this patch now. thanks.


	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>



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