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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: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: Robert Nelson <robertcnelson@gmail.com>
Tested-by: Barry Song <Baohua.Song@csr.com>
This commit is contained in:
Michal Nazarewicz 2012-01-30 13:23:47 +01:00 committed by Marek Szyprowski
parent 2fe86e0004
commit 03d44192f6
1 changed files with 11 additions and 4 deletions
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15
mm/compaction.c
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@ -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;