linux-kernel - linux-next: manual merge of the akpm tree with the dma-mapping tree

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Date:	Mon, 23 Apr 2012 16:49:53 +1000
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: linux-next: manual merge of the akpm tree with the dma-mapping tree

Hi all,

Today's linux-next merge of the scsi-post-merge tree got a conflict in
mm/page_alloc.c between commit ac77c4123661 ("mm: trigger page reclaim in
alloc_contig_range() to stabilise watermarks") from the dma-mapping tree
and commit "mm: add extra free kbytes tunable" from the akpm tree.

Just context changes.  I fixed it up (I think - see below) and can carry
the fixes as necessary.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

diff --cc mm/page_alloc.c
index 0e1c6f5,decfbf0..0000000
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@@ -5032,9 -4988,17 +5044,10 @@@ static void setup_per_zone_lowmem_reser
  	calculate_totalreserve_pages();
  }
  
 -/**
 - * setup_per_zone_wmarks - called when min_free_kbytes changes
 - * or when memory is hot-{added|removed}
 - *
 - * Ensures that the watermark[min,low,high] values for each zone are set
 - * correctly with respect to min_free_kbytes.
 - */
 -void setup_per_zone_wmarks(void)
 +static void __setup_per_zone_wmarks(void)
  {
  	unsigned long pages_min = min_free_kbytes >> (PAGE_SHIFT - 10);
+ 	unsigned long pages_low = extra_free_kbytes >> (PAGE_SHIFT - 10);
  	unsigned long lowmem_pages = 0;
  	struct zone *zone;
  	unsigned long flags;
@@@ -5074,16 -5041,13 +5090,18 @@@
  			 * If it's a lowmem zone, reserve a number of pages
  			 * proportionate to the zone's size.
  			 */
- 			zone->watermark[WMARK_MIN] = tmp;
+ 			zone->watermark[WMARK_MIN] = min;
  		}
  
- 		zone->watermark[WMARK_LOW]  = min_wmark_pages(zone) + (tmp >> 2);
- 		zone->watermark[WMARK_HIGH] = min_wmark_pages(zone) + (tmp >> 1);
+ 		zone->watermark[WMARK_LOW]  = min_wmark_pages(zone) +
+ 					low + (min >> 2);
+ 		zone->watermark[WMARK_HIGH] = min_wmark_pages(zone) +
+ 					low + (min >> 1);
 +
 +		zone->watermark[WMARK_MIN] += cma_wmark_pages(zone);
 +		zone->watermark[WMARK_LOW] += cma_wmark_pages(zone);
 +		zone->watermark[WMARK_HIGH] += cma_wmark_pages(zone);
 +
  		setup_zone_migrate_reserve(zone);
  		spin_unlock_irqrestore(&zone->lock, flags);
  	}

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