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Commit 03d44192 authored by Michal Nazarewicz's avatar Michal Nazarewicz Committed by Marek Szyprowski
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mm: compaction: introduce map_pages() 



This commit creates a map_pages() function which map pages freed
using split_free_pages().  This merely moves some code from
isolate_freepages() so that it can be reused in other places.

Signed-off-by: default avatarMichal Nazarewicz <mina86@mina86.com>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Acked-by: default avatarMel Gorman <mel@csn.ul.ie>
Reviewed-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: default avatarRobert Nelson <robertcnelson@gmail.com>
Tested-by: default avatarBarry Song <Baohua.Song@csr.com>
parent 2fe86e00

mm/compaction.c

+11 −4
Original line number Diff line number Diff line
@@ -127,6 +127,16 @@ static bool suitable_migration_target(struct page *page) 
	return false;

}



static void map_pages(struct list_head *list)

{

	struct page *page;



	list_for_each_entry(page, list, lru) {

		arch_alloc_page(page, 0);

		kernel_map_pages(page, 1, 1);

	}

}



/*

 * Based on information in the current compact_control, find blocks

 * suitable for isolating free pages from and then isolate them.
@@ -206,10 +216,7 @@ static void isolate_freepages(struct zone *zone, 
	}



	/* split_free_page does not map the pages */

	list_for_each_entry(page, freelist, lru) {

		arch_alloc_page(page, 0);

		kernel_map_pages(page, 1, 1);

	}

	map_pages(freelist);



	cc->free_pfn = high_pfn;

	cc->nr_freepages = nr_freepages;