linux-kernel - Re: [PATCH v3 -mm 1/3] mm: reclaim at order 0 when compaction is enabled

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Date:	Fri, 27 Jan 2012 11:35:02 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Hillf Danton <dhillf@...il.com>
CC:	linux-mm@...ck.org, lkml <linux-kernel@...r.kernel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Mel Gorman <mel@....ul.ie>,
	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [PATCH v3 -mm 1/3] mm: reclaim at order 0 when compaction is
 enabled

On 01/27/2012 04:13 AM, Hillf Danton wrote:

>> @@ -1195,7 +1195,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
>>                         BUG();
>>                 }
>>
>> -               if (!order)
>> +               if (!sc->order || !(sc->reclaim_mode&  RECLAIM_MODE_LUMPYRECLAIM))
>>                         continue;
>>
> Just a tiny advice 8-)
>
> mind to move checking lumpy reclaim out of the loop,
> something like

Hehe, I made the change the way it is on request
of Mel Gorman :)

I don't particularly care either way and will be
happy to make the code whichever way people prefer.

Just let me know.

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