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mm: remove del_page_from_lru, add page_off_lru 

del_page_from_lru() repeats del_page_from_lru_list(), also working out
which LRU the page was on, clearing the relevant bits.  Decouple those
functions: remove del_page_from_lru() and add page_off_lru().

Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.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:
Hugh Dickins 2012-01-12 17:20:04 -08:00 committed by Linus Torvalds
parent 4111304dab
commit 1c1c53d43b
2 changed files with 11 additions and 8 deletions
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15
include/linux/mm_inline.h
View File

@ -54,8 +54,14 @@ static inline enum lru_list page_lru_base_type(struct page *page)
return LRU_INACTIVE_ANON;
}
static inline void
del_page_from_lru(struct zone *zone, struct page *page)
/**
* page_off_lru - which LRU list was page on? clearing its lru flags.
* @page: the page to test
*
* Returns the LRU list a page was on, as an index into the array of LRU
* lists; and clears its Unevictable or Active flags, ready for freeing.
*/
static inline enum lru_list page_off_lru(struct page *page)
{
enum lru_list lru;
@ -69,9 +75,7 @@ del_page_from_lru(struct zone *zone, struct page *page)
lru += LRU_ACTIVE;
}
}
mem_cgroup_lru_del_list(page, lru);
list_del(&page->lru);
__mod_zone_page_state(zone, NR_LRU_BASE + lru, -hpage_nr_pages(page));
return lru;
}
/**
@ -92,7 +96,6 @@ static inline enum lru_list page_lru(struct page *page)
if (PageActive(page))
lru += LRU_ACTIVE;
}
return lru;
}

4
mm/swap.c
View File

@ -53,7 +53,7 @@ static void __page_cache_release(struct page *page)
spin_lock_irqsave(&zone->lru_lock, flags);
VM_BUG_ON(!PageLRU(page));
__ClearPageLRU(page);
del_page_from_lru(zone, page);
del_page_from_lru_list(zone, page, page_off_lru(page));
spin_unlock_irqrestore(&zone->lru_lock, flags);
}
}
@ -617,7 +617,7 @@ void release_pages(struct page **pages, int nr, int cold)
}
VM_BUG_ON(!PageLRU(page));
__ClearPageLRU(page);
del_page_from_lru(zone, page);
del_page_from_lru_list(zone, page, page_off_lru(page));
}
list_add(&page->lru, &pages_to_free);