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mm: page_alloc: use get_freepage_migratetype() instead of page_private()

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The page allocator uses set_page_private and page_private for handling
migratetype when it frees page.  Let's replace them with [set|get]
_freepage_migratetype to make it more clear.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minchan Kim 2012-10-08 16:32:08 -07:00 committed by Linus Torvalds
parent d95ea5d18e
commit b12c4ad14e
3 changed files with 16 additions and 4 deletions
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12
include/linux/mm.h
View File

@ -237,6 +237,18 @@ struct inode;
#define page_private(page) ((page)->private)
#define set_page_private(page, v) ((page)->private = (v))
/* It's valid only if the page is free path or free_list */
static inline void set_freepage_migratetype(struct page *page, int migratetype)
{
set_page_private(page, migratetype);
}
/* It's valid only if the page is free path or free_list */
static inline int get_freepage_migratetype(struct page *page)
{
return page_private(page);
}
/*
* FIXME: take this include out, include page-flags.h in
* files which need it (119 of them)

6
mm/page_alloc.c
View File

@ -674,7 +674,7 @@ static void free_pcppages_bulk(struct zone *zone, int count,
page = list_entry(list->prev, struct page, lru);
/* must delete as __free_one_page list manipulates */
list_del(&page->lru);
mt = page_private(page);
mt = get_freepage_migratetype(page);
/* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */
__free_one_page(page, zone, 0, mt);
trace_mm_page_pcpu_drain(page, 0, mt);
@ -1143,7 +1143,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
if (!is_migrate_cma(mt) && mt != MIGRATE_ISOLATE)
mt = migratetype;
}
set_page_private(page, mt);
set_freepage_migratetype(page, mt);
list = &page->lru;
if (is_migrate_cma(mt))
__mod_zone_page_state(zone, NR_FREE_CMA_PAGES,
@ -1313,7 +1313,7 @@ void free_hot_cold_page(struct page *page, int cold)
return;
migratetype = get_pageblock_migratetype(page);
set_page_private(page, migratetype);
set_freepage_migratetype(page, migratetype);
local_irq_save(flags);
if (unlikely(wasMlocked))
free_page_mlock(page);

2
mm/page_isolation.c
View File

@ -203,7 +203,7 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn)
if (PageBuddy(page))
pfn += 1 << page_order(page);
else if (page_count(page) == 0 &&
page_private(page) == MIGRATE_ISOLATE)
get_freepage_migratetype(page) == MIGRATE_ISOLATE)
pfn += 1;
else
break;