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Commit 6290df54 authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds
Browse files

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: default avatarJohannes Weiner <jweiner@redhat.com>
Reviewed-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
Reviewed-by: default avatarKirill 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b95a2f2d

include/linux/mm_inline.h

+1 −1
Original line number Diff line number Diff line
@@ -33,7 +33,7 @@ __add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list l, 
static inline void

add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list l)

{

	__add_page_to_lru_list(zone, page, l, &zone->lru[l].list);

	__add_page_to_lru_list(zone, page, l, &zone->lruvec.lists[l]);

}



static inline void

include/linux/mmzone.h

+6 −4
Original line number Diff line number Diff line
@@ -159,6 +159,10 @@ static inline int is_unevictable_lru(enum lru_list l) 
	return (l == LRU_UNEVICTABLE);

}



struct lruvec {

	struct list_head lists[NR_LRU_LISTS];

};



/* Mask used at gathering information at once (see memcontrol.c) */

#define LRU_ALL_FILE (BIT(LRU_INACTIVE_FILE) | BIT(LRU_ACTIVE_FILE))

#define LRU_ALL_ANON (BIT(LRU_INACTIVE_ANON) | BIT(LRU_ACTIVE_ANON))
@@ -365,9 +369,7 @@ struct zone { 


	/* Fields commonly accessed by the page reclaim scanner */

	spinlock_t		lru_lock;

	struct zone_lru {

		struct list_head list;

	} lru[NR_LRU_LISTS];

	struct lruvec		lruvec;



	struct zone_reclaim_stat reclaim_stat;

mm/memcontrol.c

+7 −10
Original line number Diff line number Diff line
@@ -134,10 +134,7 @@ struct mem_cgroup_reclaim_iter { 
 * per-zone information in memory controller.

 */

struct mem_cgroup_per_zone {

	/*

	 * spin_lock to protect the per cgroup LRU

	 */

	struct list_head	lists[NR_LRU_LISTS];

	struct lruvec		lruvec;

	unsigned long		count[NR_LRU_LISTS];



	struct mem_cgroup_reclaim_iter reclaim_iter[DEF_PRIORITY + 1];
@@ -1061,7 +1058,7 @@ void mem_cgroup_rotate_reclaimable_page(struct page *page) 
	/* Ensure pc->mem_cgroup is visible after reading PCG_USED. */

	smp_rmb();

	mz = page_cgroup_zoneinfo(pc->mem_cgroup, page);

	list_move_tail(&pc->lru, &mz->lists[lru]);

	list_move_tail(&pc->lru, &mz->lruvec.lists[lru]);

}



void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru)
@@ -1079,7 +1076,7 @@ void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru) 
	/* Ensure pc->mem_cgroup is visible after reading PCG_USED. */

	smp_rmb();

	mz = page_cgroup_zoneinfo(pc->mem_cgroup, page);

	list_move(&pc->lru, &mz->lists[lru]);

	list_move(&pc->lru, &mz->lruvec.lists[lru]);

}



void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru)
@@ -1109,7 +1106,7 @@ void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru) 
	/* huge page split is done under lru_lock. so, we have no races. */

	MEM_CGROUP_ZSTAT(mz, lru) += 1 << compound_order(page);

	SetPageCgroupAcctLRU(pc);

	list_add(&pc->lru, &mz->lists[lru]);

	list_add(&pc->lru, &mz->lruvec.lists[lru]);

}



/*
@@ -1307,7 +1304,7 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, 


	BUG_ON(!mem_cont);

	mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);

	src = &mz->lists[lru];

	src = &mz->lruvec.lists[lru];



	scan = 0;

	list_for_each_entry_safe_reverse(pc, tmp, src, lru) {
@@ -3738,7 +3735,7 @@ static int mem_cgroup_force_empty_list(struct mem_cgroup *memcg, 


	zone = &NODE_DATA(node)->node_zones[zid];

	mz = mem_cgroup_zoneinfo(memcg, node, zid);

	list = &mz->lists[lru];

	list = &mz->lruvec.lists[lru];



	loop = MEM_CGROUP_ZSTAT(mz, lru);

	/* give some margin against EBUSY etc...*/
@@ -4864,7 +4861,7 @@ static int alloc_mem_cgroup_per_zone_info(struct mem_cgroup *memcg, int node) 
	for (zone = 0; zone < MAX_NR_ZONES; zone++) {

		mz = &pn->zoneinfo[zone];

		for_each_lru(l)

			INIT_LIST_HEAD(&mz->lists[l]);

			INIT_LIST_HEAD(&mz->lruvec.lists[l]);

		mz->usage_in_excess = 0;

		mz->on_tree = false;

		mz->mem = memcg;

mm/page_alloc.c

+1 −1
Original line number Diff line number Diff line
@@ -4288,7 +4288,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat, 


		zone_pcp_init(zone);

		for_each_lru(l)

			INIT_LIST_HEAD(&zone->lru[l].list);

			INIT_LIST_HEAD(&zone->lruvec.lists[l]);

		zone->reclaim_stat.recent_rotated[0] = 0;

		zone->reclaim_stat.recent_rotated[1] = 0;

		zone->reclaim_stat.recent_scanned[0] = 0;

mm/swap.c

+5 −6
Original line number Diff line number Diff line
@@ -236,7 +236,7 @@ static void pagevec_move_tail_fn(struct page *page, void *arg) 


	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 @@ static void lru_deactivate_fn(struct page *page, void *arg) 
		 * 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 @@ void lru_add_page_tail(struct zone* zone, 
	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 @@ void lru_add_page_tail(struct zone* zone, 
		}

		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);