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Merge branch 'akpm' (patches from Andrew)

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Merge two mm fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: prevent NR_ISOLATE_* stats from going negative
  Revert "mm, page_alloc: only use per-cpu allocator for irq-safe requests"
This commit is contained in:
Linus Torvalds 2017-04-20 15:31:08 -07:00
commit c154165e93
2 changed files with 21 additions and 24 deletions
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2
mm/migrate.c
View File

@ -184,9 +184,9 @@ void putback_movable_pages(struct list_head *l)
unlock_page(page);
put_page(page);
} else {
putback_lru_page(page);
dec_node_page_state(page, NR_ISOLATED_ANON +
page_is_file_cache(page));
putback_lru_page(page);
}
}
}

43
mm/page_alloc.c
View File

@ -1090,10 +1090,10 @@ static void free_pcppages_bulk(struct zone *zone, int count,
{
int migratetype = 0;
int batch_free = 0;
unsigned long nr_scanned, flags;
unsigned long nr_scanned;
bool isolated_pageblocks;
spin_lock_irqsave(&zone->lock, flags);
spin_lock(&zone->lock);
isolated_pageblocks = has_isolate_pageblock(zone);
nr_scanned = node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED);
if (nr_scanned)
@ -1142,7 +1142,7 @@ static void free_pcppages_bulk(struct zone *zone, int count,
trace_mm_page_pcpu_drain(page, 0, mt);
} while (--count && --batch_free && !list_empty(list));
}
spin_unlock_irqrestore(&zone->lock, flags);
spin_unlock(&zone->lock);
}
static void free_one_page(struct zone *zone,
@ -1150,9 +1150,8 @@ static void free_one_page(struct zone *zone,
unsigned int order,
int migratetype)
{
unsigned long nr_scanned, flags;
spin_lock_irqsave(&zone->lock, flags);
__count_vm_events(PGFREE, 1 << order);
unsigned long nr_scanned;
spin_lock(&zone->lock);
nr_scanned = node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED);
if (nr_scanned)
__mod_node_page_state(zone->zone_pgdat, NR_PAGES_SCANNED, -nr_scanned);
@ -1162,7 +1161,7 @@ static void free_one_page(struct zone *zone,
migratetype = get_pfnblock_migratetype(page, pfn);
}
__free_one_page(page, pfn, zone, order, migratetype);
spin_unlock_irqrestore(&zone->lock, flags);
spin_unlock(&zone->lock);
}
static void __meminit __init_single_page(struct page *page, unsigned long pfn,
@ -1240,6 +1239,7 @@ void __meminit reserve_bootmem_region(phys_addr_t start, phys_addr_t end)
static void __free_pages_ok(struct page *page, unsigned int order)
{
unsigned long flags;
int migratetype;
unsigned long pfn = page_to_pfn(page);
@ -1247,7 +1247,10 @@ static void __free_pages_ok(struct page *page, unsigned int order)
return;
migratetype = get_pfnblock_migratetype(page, pfn);
local_irq_save(flags);
__count_vm_events(PGFREE, 1 << order);
free_one_page(page_zone(page), page, pfn, order, migratetype);
local_irq_restore(flags);
}
static void __init __free_pages_boot_core(struct page *page, unsigned int order)
@ -2219,9 +2222,8 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
int migratetype, bool cold)
{
int i, alloced = 0;
unsigned long flags;
spin_lock_irqsave(&zone->lock, flags);
spin_lock(&zone->lock);
for (i = 0; i < count; ++i) {
struct page *page = __rmqueue(zone, order, migratetype);
if (unlikely(page == NULL))
@ -2257,7 +2259,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
* pages added to the pcp list.
*/
__mod_zone_page_state(zone, NR_FREE_PAGES, -(i << order));
spin_unlock_irqrestore(&zone->lock, flags);
spin_unlock(&zone->lock);
return alloced;
}
@ -2485,20 +2487,17 @@ void free_hot_cold_page(struct page *page, bool cold)
{
struct zone *zone = page_zone(page);
struct per_cpu_pages *pcp;
unsigned long flags;
unsigned long pfn = page_to_pfn(page);
int migratetype;
if (in_interrupt()) {
__free_pages_ok(page, 0);
return;
}
if (!free_pcp_prepare(page))
return;
migratetype = get_pfnblock_migratetype(page, pfn);
set_pcppage_migratetype(page, migratetype);
preempt_disable();
local_irq_save(flags);
__count_vm_event(PGFREE);
/*
* We only track unmovable, reclaimable and movable on pcp lists.
@ -2515,7 +2514,6 @@ void free_hot_cold_page(struct page *page, bool cold)
migratetype = MIGRATE_MOVABLE;
}
__count_vm_event(PGFREE);
pcp = &this_cpu_ptr(zone->pageset)->pcp;
if (!cold)
list_add(&page->lru, &pcp->lists[migratetype]);
@ -2529,7 +2527,7 @@ void free_hot_cold_page(struct page *page, bool cold)
}
out:
preempt_enable();
local_irq_restore(flags);
}
/*
@ -2654,8 +2652,6 @@ static struct page *__rmqueue_pcplist(struct zone *zone, int migratetype,
{
struct page *page;
VM_BUG_ON(in_interrupt());
do {
if (list_empty(list)) {
pcp->count += rmqueue_bulk(zone, 0,
@ -2686,8 +2682,9 @@ static struct page *rmqueue_pcplist(struct zone *preferred_zone,
struct list_head *list;
bool cold = ((gfp_flags & __GFP_COLD) != 0);
struct page *page;
unsigned long flags;
preempt_disable();
local_irq_save(flags);
pcp = &this_cpu_ptr(zone->pageset)->pcp;
list = &pcp->lists[migratetype];
page = __rmqueue_pcplist(zone, migratetype, cold, pcp, list);
@ -2695,7 +2692,7 @@ static struct page *rmqueue_pcplist(struct zone *preferred_zone,
__count_zid_vm_events(PGALLOC, page_zonenum(page), 1 << order);
zone_statistics(preferred_zone, zone);
}
preempt_enable();
local_irq_restore(flags);
return page;
}
@ -2711,7 +2708,7 @@ struct page *rmqueue(struct zone *preferred_zone,
unsigned long flags;
struct page *page;
if (likely(order == 0) && !in_interrupt()) {
if (likely(order == 0)) {
page = rmqueue_pcplist(preferred_zone, zone, order,
gfp_flags, migratetype);
goto out;