mm: collect LRU list heads into struct lruvec
Having a unified structure with a LRU list set for both global zones and
per-memcg zones allows to keep that code simple which deals with LRU
lists and does not care about the container itself.
Once the per-memcg LRU lists directly link struct pages, the isolation
function and all other list manipulations are shared between the memcg
case and the global LRU case.
Signed-off-by: Johannes Weiner <jweiner@redhat.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Ying Han <yinghan@google.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/swap.c b/mm/swap.c
index 67a09a6..76ef79d 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -236,7 +236,7 @@
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
enum lru_list lru = page_lru_base_type(page);
- list_move_tail(&page->lru, &zone->lru[lru].list);
+ list_move_tail(&page->lru, &zone->lruvec.lists[lru]);
mem_cgroup_rotate_reclaimable_page(page);
(*pgmoved)++;
}
@@ -480,7 +480,7 @@
* The page's writeback ends up during pagevec
* We moves tha page into tail of inactive.
*/
- list_move_tail(&page->lru, &zone->lru[lru].list);
+ list_move_tail(&page->lru, &zone->lruvec.lists[lru]);
mem_cgroup_rotate_reclaimable_page(page);
__count_vm_event(PGROTATED);
}
@@ -654,7 +654,6 @@
int active;
enum lru_list lru;
const int file = 0;
- struct list_head *head;
VM_BUG_ON(!PageHead(page));
VM_BUG_ON(PageCompound(page_tail));
@@ -674,10 +673,10 @@
}
update_page_reclaim_stat(zone, page_tail, file, active);
if (likely(PageLRU(page)))
- head = page->lru.prev;
+ __add_page_to_lru_list(zone, page_tail, lru,
+ page->lru.prev);
else
- head = &zone->lru[lru].list;
- __add_page_to_lru_list(zone, page_tail, lru, head);
+ add_page_to_lru_list(zone, page_tail, lru);
} else {
SetPageUnevictable(page_tail);
add_page_to_lru_list(zone, page_tail, LRU_UNEVICTABLE);