kernel-ark/include/linux/mm_inline.h
Nick Piggin 053837fce7 [PATCH] mm: migration page refcounting fix
Migration code currently does not take a reference to target page
properly, so between unlocking the pte and trying to take a new
reference to the page with isolate_lru_page, anything could happen to
it.

Fix this by holding the pte lock until we get a chance to elevate the
refcount.

Other small cleanups while we're here.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-18 19:20:17 -08:00

42 lines
781 B
C

static inline void
add_page_to_active_list(struct zone *zone, struct page *page)
{
list_add(&page->lru, &zone->active_list);
zone->nr_active++;
}
static inline void
add_page_to_inactive_list(struct zone *zone, struct page *page)
{
list_add(&page->lru, &zone->inactive_list);
zone->nr_inactive++;
}
static inline void
del_page_from_active_list(struct zone *zone, struct page *page)
{
list_del(&page->lru);
zone->nr_active--;
}
static inline void
del_page_from_inactive_list(struct zone *zone, struct page *page)
{
list_del(&page->lru);
zone->nr_inactive--;
}
static inline void
del_page_from_lru(struct zone *zone, struct page *page)
{
list_del(&page->lru);
if (PageActive(page)) {
ClearPageActive(page);
zone->nr_active--;
} else {
zone->nr_inactive--;
}
}