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mm: introduce page_lru_base_type()

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Instead of abusing page_is_file_cache() for LRU list index arithmetic, add
another helper with a more appropriate name and convert the non-boolean
users of page_is_file_cache() accordingly.

This new helper gives the LRU base type a page is supposed to live on,
inactive anon or inactive file.

[[email protected]: convert del_page_from_lru() also]
Signed-off-by: Johannes Weiner <[email protected]>
Reviewed-by: Rik van Riel <[email protected]>
Cc: Minchan Kim <[email protected]>
Reviewed-by: KOSAKI Motohiro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Johannes Weiner 2009-09-21 17:02:58 -07:00 • committed by Linus Torvalds
commit 401a8e1c16
3 changed files with 24 additions and 9 deletions
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4
mm/swap.c
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@ -118,7 +118,7 @@ static void pagevec_move_tail(struct pagevec *pvec)
spin_lock(&zone->lru_lock);
}
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
int lru = page_is_file_cache(page);
int lru = page_lru_base_type(page);
list_move_tail(&page->lru, &zone->lru[lru].list);
pgmoved++;
}
@ -181,7 +181,7 @@ void activate_page(struct page *page)
spin_lock_irq(&zone->lru_lock);
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
int file = page_is_file_cache(page);
int lru = LRU_BASE + file;
int lru = page_lru_base_type(page);
del_page_from_lru_list(zone, page, lru);
SetPageActive(page);