mm: compaction: introduce map_pages() (03d44192) · Commits · 戴 / test

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>

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;

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