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mm, vmscan: move lru_lock to the node

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Node-based reclaim requires node-based LRUs and locking.  This is a
preparation patch that just moves the lru_lock to the node so later
patches are easier to review.  It is a mechanical change but note this
patch makes contention worse because the LRU lock is hotter and direct
reclaim and kswapd can contend on the same lock even when reclaiming
from different zones.

Link: http://lkml.kernel.org/r/1467970510-21195-3-git-send-email-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman 2016-07-28 15:45:28 -07:00 committed by Linus Torvalds
parent 75ef718405
commit a52633d8e9
14 changed files with 76 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/cgroup-v1/memcg_test.txt
View File

@ -107,9 +107,9 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y.
8. LRU
Each memcg has its own private LRU. Now, its handling is under global
VM's control (means that it's handled under global zone->lru_lock).
VM's control (means that it's handled under global zone_lru_lock).
Almost all routines around memcg's LRU is called by global LRU's
list management functions under zone->lru_lock().
list management functions under zone_lru_lock().
A special function is mem_cgroup_isolate_pages(). This scans
memcg's private LRU and call __isolate_lru_page() to extract a page

4
Documentation/cgroup-v1/memory.txt
View File

@ -267,11 +267,11 @@ When oom event notifier is registered, event will be delivered.
Other lock order is following:
PG_locked.
mm->page_table_lock
zone->lru_lock
zone_lru_lock
lock_page_cgroup.
In many cases, just lock_page_cgroup() is called.
per-zone-per-cgroup LRU (cgroup's private LRU) is just guarded by
zone->lru_lock, it has no lock of its own.
zone_lru_lock, it has no lock of its own.
2.7 Kernel Memory Extension (CONFIG_MEMCG_KMEM)

2
include/linux/mm_types.h
View File

@ -118,7 +118,7 @@ struct page {
*/
union {
struct list_head lru; /* Pageout list, eg. active_list
* protected by zone->lru_lock !
* protected by zone_lru_lock !
* Can be used as a generic list
* by the page owner.
*/

10
include/linux/mmzone.h
View File

@ -93,7 +93,7 @@ struct free_area {
struct pglist_data;
/*
* zone->lock and zone->lru_lock are two of the hottest locks in the kernel.
* zone->lock and the zone lru_lock are two of the hottest locks in the kernel.
* So add a wild amount of padding here to ensure that they fall into separate
* cachelines. There are very few zone structures in the machine, so space
* consumption is not a concern here.
@ -496,7 +496,6 @@ struct zone {
/* Write-intensive fields used by page reclaim */
/* Fields commonly accessed by the page reclaim scanner */
spinlock_t lru_lock;
struct lruvec lruvec;
/*
@ -690,6 +689,9 @@ typedef struct pglist_data {
/* Number of pages migrated during the rate limiting time interval */
unsigned long numabalancing_migrate_nr_pages;
#endif
/* Write-intensive fields used by page reclaim */
ZONE_PADDING(_pad1_)
spinlock_t lru_lock;
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
/*
@ -721,6 +723,10 @@ typedef struct pglist_data {
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) pgdat_end_pfn(NODE_DATA(nid))
static inline spinlock_t *zone_lru_lock(struct zone *zone)
{
return &zone->zone_pgdat->lru_lock;
}
static inline unsigned long pgdat_end_pfn(pg_data_t *pgdat)
{

10
mm/compaction.c
View File

@ -752,7 +752,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
* if contended.
*/
if (!(low_pfn % SWAP_CLUSTER_MAX)
&& compact_unlock_should_abort(&zone->lru_lock, flags,
&& compact_unlock_should_abort(zone_lru_lock(zone), flags,
&locked, cc))
break;
@ -813,7 +813,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
if (unlikely(__PageMovable(page)) &&
!PageIsolated(page)) {
if (locked) {
spin_unlock_irqrestore(&zone->lru_lock,
spin_unlock_irqrestore(zone_lru_lock(zone),
flags);
locked = false;
}
@ -836,7 +836,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
/* If we already hold the lock, we can skip some rechecking */
if (!locked) {
locked = compact_trylock_irqsave(&zone->lru_lock,
locked = compact_trylock_irqsave(zone_lru_lock(zone),
&flags, cc);
if (!locked)
break;
@ -899,7 +899,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
*/
if (nr_isolated) {
if (locked) {
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
locked = false;
}
acct_isolated(zone, cc);
@ -927,7 +927,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
low_pfn = end_pfn;
if (locked)
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
/*
* Update the pageblock-skip information and cached scanner pfn,

4
mm/filemap.c
View File

@ -95,8 +95,8 @@
* ->swap_lock (try_to_unmap_one)
* ->private_lock (try_to_unmap_one)
* ->tree_lock (try_to_unmap_one)
* ->zone.lru_lock (follow_page->mark_page_accessed)
* ->zone.lru_lock (check_pte_range->isolate_lru_page)
* ->zone_lru_lock(zone) (follow_page->mark_page_accessed)
* ->zone_lru_lock(zone) (check_pte_range->isolate_lru_page)
* ->private_lock (page_remove_rmap->set_page_dirty)
* ->tree_lock (page_remove_rmap->set_page_dirty)
* bdi.wb->list_lock (page_remove_rmap->set_page_dirty)

6
mm/huge_memory.c
View File

@ -1848,7 +1848,7 @@ static void __split_huge_page(struct page *page, struct list_head *list,
spin_unlock(&head->mapping->tree_lock);
}
spin_unlock_irqrestore(&page_zone(head)->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(page_zone(head)), flags);
unfreeze_page(head);
@ -2034,7 +2034,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
lru_add_drain();
/* prevent PageLRU to go away from under us, and freeze lru stats */
spin_lock_irqsave(&page_zone(head)->lru_lock, flags);
spin_lock_irqsave(zone_lru_lock(page_zone(head)), flags);
if (mapping) {
void **pslot;
@ -2077,7 +2077,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
spin_unlock(&pgdata->split_queue_lock);
fail: if (mapping)
spin_unlock(&mapping->tree_lock);
spin_unlock_irqrestore(&page_zone(head)->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(page_zone(head)), flags);
unfreeze_page(head);
ret = -EBUSY;
}

6
mm/memcontrol.c
View File

@ -2065,7 +2065,7 @@ static void lock_page_lru(struct page *page, int *isolated)
{
struct zone *zone = page_zone(page);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
if (PageLRU(page)) {
struct lruvec *lruvec;
@ -2089,7 +2089,7 @@ static void unlock_page_lru(struct page *page, int isolated)
SetPageLRU(page);
add_page_to_lru_list(page, lruvec, page_lru(page));
}
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
}
static void commit_charge(struct page *page, struct mem_cgroup *memcg,
@ -2389,7 +2389,7 @@ void memcg_kmem_uncharge(struct page *page, int order)
/*
* Because tail pages are not marked as "used", set it. We're under
* zone->lru_lock and migration entries setup in all page mappings.
* zone_lru_lock and migration entries setup in all page mappings.
*/
void mem_cgroup_split_huge_fixup(struct page *head)
{

10
mm/mlock.c
View File

@ -188,7 +188,7 @@ unsigned int munlock_vma_page(struct page *page)
* might otherwise copy PageMlocked to part of the tail pages before
* we clear it in the head page. It also stabilizes hpage_nr_pages().
*/
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
nr_pages = hpage_nr_pages(page);
if (!TestClearPageMlocked(page))
@ -197,14 +197,14 @@ unsigned int munlock_vma_page(struct page *page)
__mod_zone_page_state(zone, NR_MLOCK, -nr_pages);
if (__munlock_isolate_lru_page(page, true)) {
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
__munlock_isolated_page(page);
goto out;
}
__munlock_isolation_failed(page);
unlock_out:
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
out:
return nr_pages - 1;
@ -289,7 +289,7 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone)
pagevec_init(&pvec_putback, 0);
/* Phase 1: page isolation */
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
for (i = 0; i < nr; i++) {
struct page *page = pvec->pages[i];
@ -315,7 +315,7 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone)
}
delta_munlocked = -nr + pagevec_count(&pvec_putback);
__mod_zone_page_state(zone, NR_MLOCK, delta_munlocked);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
/* Now we can release pins of pages that we are not munlocking */
pagevec_release(&pvec_putback);

6
mm/page_alloc.c
View File

@ -5904,6 +5904,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
init_waitqueue_head(&pgdat->kcompactd_wait);
#endif
pgdat_page_ext_init(pgdat);
spin_lock_init(&pgdat->lru_lock);
for (j = 0; j < MAX_NR_ZONES; j++) {
struct zone *zone = pgdat->node_zones + j;
@ -5958,10 +5959,9 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
zone->min_slab_pages = (freesize * sysctl_min_slab_ratio) / 100;
#endif
zone->name = zone_names[j];
spin_lock_init(&zone->lock);
spin_lock_init(&zone->lru_lock);
zone_seqlock_init(zone);
zone->zone_pgdat = pgdat;
spin_lock_init(&zone->lock);
zone_seqlock_init(zone);
zone_pcp_init(zone);
/* For bootup, initialized properly in watermark setup */

4
mm/page_idle.c
View File

@ -41,12 +41,12 @@ static struct page *page_idle_get_page(unsigned long pfn)
return NULL;
zone = page_zone(page);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
if (unlikely(!PageLRU(page))) {
put_page(page);
page = NULL;
}
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
return page;
}

2
mm/rmap.c
View File

@ -27,7 +27,7 @@
* mapping->i_mmap_rwsem
* anon_vma->rwsem
* mm->page_table_lock or pte_lock
* zone->lru_lock (in mark_page_accessed, isolate_lru_page)
* zone_lru_lock (in mark_page_accessed, isolate_lru_page)
* swap_lock (in swap_duplicate, swap_info_get)
* mmlist_lock (in mmput, drain_mmlist and others)
* mapping->private_lock (in __set_page_dirty_buffers)

30
mm/swap.c
View File

@ -62,12 +62,12 @@ static void __page_cache_release(struct page *page)
struct lruvec *lruvec;
unsigned long flags;
spin_lock_irqsave(&zone->lru_lock, flags);
spin_lock_irqsave(zone_lru_lock(zone), flags);
lruvec = mem_cgroup_page_lruvec(page, zone);
VM_BUG_ON_PAGE(!PageLRU(page), page);
__ClearPageLRU(page);
del_page_from_lru_list(page, lruvec, page_off_lru(page));
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
}
mem_cgroup_uncharge(page);
}
@ -189,16 +189,16 @@ static void pagevec_lru_move_fn(struct pagevec *pvec,
if (pagezone != zone) {
if (zone)
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
zone = pagezone;
spin_lock_irqsave(&zone->lru_lock, flags);
spin_lock_irqsave(zone_lru_lock(zone), flags);
}
lruvec = mem_cgroup_page_lruvec(page, zone);
(*move_fn)(page, lruvec, arg);
}
if (zone)
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
release_pages(pvec->pages, pvec->nr, pvec->cold);
pagevec_reinit(pvec);
}
@ -318,9 +318,9 @@ void activate_page(struct page *page)
struct zone *zone = page_zone(page);
page = compound_head(page);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
__activate_page(page, mem_cgroup_page_lruvec(page, zone), NULL);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
}
#endif
@ -448,13 +448,13 @@ void add_page_to_unevictable_list(struct page *page)
struct zone *zone = page_zone(page);
struct lruvec *lruvec;
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
lruvec = mem_cgroup_page_lruvec(page, zone);
ClearPageActive(page);
SetPageUnevictable(page);
SetPageLRU(page);
add_page_to_lru_list(page, lruvec, LRU_UNEVICTABLE);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
}
/**
@ -744,7 +744,7 @@ void release_pages(struct page **pages, int nr, bool cold)
* same zone. The lock is held only if zone != NULL.
*/
if (zone && ++lock_batch == SWAP_CLUSTER_MAX) {
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
zone = NULL;
}
@ -759,7 +759,7 @@ void release_pages(struct page **pages, int nr, bool cold)
if (PageCompound(page)) {
if (zone) {
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
zone = NULL;
}
__put_compound_page(page);
@ -771,11 +771,11 @@ void release_pages(struct page **pages, int nr, bool cold)
if (pagezone != zone) {
if (zone)
spin_unlock_irqrestore(&zone->lru_lock,
spin_unlock_irqrestore(zone_lru_lock(zone),
flags);
lock_batch = 0;
zone = pagezone;
spin_lock_irqsave(&zone->lru_lock, flags);
spin_lock_irqsave(zone_lru_lock(zone), flags);
}
lruvec = mem_cgroup_page_lruvec(page, zone);
@ -790,7 +790,7 @@ void release_pages(struct page **pages, int nr, bool cold)
list_add(&page->lru, &pages_to_free);
}
if (zone)
spin_unlock_irqrestore(&zone->lru_lock, flags);
spin_unlock_irqrestore(zone_lru_lock(zone), flags);
mem_cgroup_uncharge_list(&pages_to_free);
free_hot_cold_page_list(&pages_to_free, cold);
@ -826,7 +826,7 @@ void lru_add_page_tail(struct page *page, struct page *page_tail,
VM_BUG_ON_PAGE(PageCompound(page_tail), page);
VM_BUG_ON_PAGE(PageLRU(page_tail), page);
VM_BUG_ON(NR_CPUS != 1 &&
!spin_is_locked(&lruvec_zone(lruvec)->lru_lock));
!spin_is_locked(zone_lru_lock(lruvec_zone(lruvec))));
if (!list)
SetPageLRU(page_tail);

48
mm/vmscan.c
View File

@ -1349,7 +1349,7 @@ int __isolate_lru_page(struct page *page, isolate_mode_t mode)
}
/*
* zone->lru_lock is heavily contended. Some of the functions that
* zone_lru_lock is heavily contended. Some of the functions that
* shrink the lists perform better by taking out a batch of pages
* and working on them outside the LRU lock.
*
@ -1444,7 +1444,7 @@ int isolate_lru_page(struct page *page)
struct zone *zone = page_zone(page);
struct lruvec *lruvec;
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
lruvec = mem_cgroup_page_lruvec(page, zone);
if (PageLRU(page)) {
int lru = page_lru(page);
@ -1453,7 +1453,7 @@ int isolate_lru_page(struct page *page)
del_page_from_lru_list(page, lruvec, lru);
ret = 0;
}
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
}
return ret;
}
@ -1512,9 +1512,9 @@ putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
VM_BUG_ON_PAGE(PageLRU(page), page);
list_del(&page->lru);
if (unlikely(!page_evictable(page))) {
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
putback_lru_page(page);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
continue;
}
@ -1535,10 +1535,10 @@ putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list)
del_page_from_lru_list(page, lruvec, lru);
if (unlikely(PageCompound(page))) {
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
mem_cgroup_uncharge(page);
(*get_compound_page_dtor(page))(page);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
} else
list_add(&page->lru, &pages_to_free);
}
@ -1600,7 +1600,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
if (!sc->may_writepage)
isolate_mode |= ISOLATE_CLEAN;
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
nr_taken = isolate_lru_pages(nr_to_scan, lruvec, &page_list,
&nr_scanned, sc, isolate_mode, lru);
@ -1616,7 +1616,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
else
__count_zone_vm_events(PGSCAN_DIRECT, zone, nr_scanned);
}
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
if (nr_taken == 0)
return 0;
@ -1626,7 +1626,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
&nr_writeback, &nr_immediate,
false);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
if (global_reclaim(sc)) {
if (current_is_kswapd())
@ -1641,7 +1641,7 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
mem_cgroup_uncharge_list(&page_list);
free_hot_cold_page_list(&page_list, true);
@ -1715,9 +1715,9 @@ shrink_inactive_list(unsigned long nr_to_scan, struct lruvec *lruvec,
* processes, from rmap.
*
* If the pages are mostly unmapped, the processing is fast and it is
* appropriate to hold zone->lru_lock across the whole operation. But if
* appropriate to hold zone_lru_lock across the whole operation. But if
* the pages are mapped, the processing is slow (page_referenced()) so we
* should drop zone->lru_lock around each page. It's impossible to balance
* should drop zone_lru_lock around each page. It's impossible to balance
* this, so instead we remove the pages from the LRU while processing them.
* It is safe to rely on PG_active against the non-LRU pages in here because
* nobody will play with that bit on a non-LRU page.
@ -1754,10 +1754,10 @@ static void move_active_pages_to_lru(struct lruvec *lruvec,
del_page_from_lru_list(page, lruvec, lru);
if (unlikely(PageCompound(page))) {
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
mem_cgroup_uncharge(page);
(*get_compound_page_dtor(page))(page);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
} else
list_add(&page->lru, pages_to_free);
}
@ -1792,7 +1792,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
if (!sc->may_writepage)
isolate_mode |= ISOLATE_CLEAN;
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
nr_taken = isolate_lru_pages(nr_to_scan, lruvec, &l_hold,
&nr_scanned, sc, isolate_mode, lru);
@ -1805,7 +1805,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
__mod_zone_page_state(zone, NR_PAGES_SCANNED, nr_scanned);
__count_zone_vm_events(PGREFILL, zone, nr_scanned);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
while (!list_empty(&l_hold)) {
cond_resched();
@ -1850,7 +1850,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
/*
* Move pages back to the lru list.
*/
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
/*
* Count referenced pages from currently used mappings as rotated,
* even though only some of them are actually re-activated. This
@ -1862,7 +1862,7 @@ static void shrink_active_list(unsigned long nr_to_scan,
move_active_pages_to_lru(lruvec, &l_active, &l_hold, lru);
move_active_pages_to_lru(lruvec, &l_inactive, &l_hold, lru - LRU_ACTIVE);
__mod_zone_page_state(zone, NR_ISOLATED_ANON + file, -nr_taken);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
mem_cgroup_uncharge_list(&l_hold);
free_hot_cold_page_list(&l_hold, true);
@ -2077,7 +2077,7 @@ static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
file = lruvec_lru_size(lruvec, LRU_ACTIVE_FILE) +
lruvec_lru_size(lruvec, LRU_INACTIVE_FILE);
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
if (unlikely(reclaim_stat->recent_scanned[0] > anon / 4)) {
reclaim_stat->recent_scanned[0] /= 2;
reclaim_stat->recent_rotated[0] /= 2;
@ -2098,7 +2098,7 @@ static void get_scan_count(struct lruvec *lruvec, struct mem_cgroup *memcg,
fp = file_prio * (reclaim_stat->recent_scanned[1] + 1);
fp /= reclaim_stat->recent_rotated[1] + 1;
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
fraction[0] = ap;
fraction[1] = fp;
@ -3791,9 +3791,9 @@ void check_move_unevictable_pages(struct page **pages, int nr_pages)
pagezone = page_zone(page);
if (pagezone != zone) {
if (zone)
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
zone = pagezone;
spin_lock_irq(&zone->lru_lock);
spin_lock_irq(zone_lru_lock(zone));
}
lruvec = mem_cgroup_page_lruvec(page, zone);
@ -3814,7 +3814,7 @@ void check_move_unevictable_pages(struct page **pages, int nr_pages)
if (zone) {
__count_vm_events(UNEVICTABLE_PGRESCUED, pgrescued);
__count_vm_events(UNEVICTABLE_PGSCANNED, pgscanned);
spin_unlock_irq(&zone->lru_lock);
spin_unlock_irq(zone_lru_lock(zone));
}
}
#endif /* CONFIG_SHMEM */