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-rw-r--r--mm/page_alloc.c394
1 files changed, 218 insertions, 176 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5dba2933c9c0..a59bdb653958 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -261,8 +261,9 @@ static int page_outside_zone_boundaries(struct zone *zone, struct page *page)
} while (zone_span_seqretry(zone, seq));
if (ret)
- pr_err("page %lu outside zone [ %lu - %lu ]\n",
- pfn, start_pfn, start_pfn + sp);
+ pr_err("page 0x%lx outside node %d zone %s [ 0x%lx - 0x%lx ]\n",
+ pfn, zone_to_nid(zone), zone->name,
+ start_pfn, start_pfn + sp);
return ret;
}
@@ -408,7 +409,8 @@ static int destroy_compound_page(struct page *page, unsigned long order)
return bad;
}
-static inline void prep_zero_page(struct page *page, int order, gfp_t gfp_flags)
+static inline void prep_zero_page(struct page *page, unsigned int order,
+ gfp_t gfp_flags)
{
int i;
@@ -452,7 +454,7 @@ static inline void set_page_guard_flag(struct page *page) { }
static inline void clear_page_guard_flag(struct page *page) { }
#endif
-static inline void set_page_order(struct page *page, int order)
+static inline void set_page_order(struct page *page, unsigned int order)
{
set_page_private(page, order);
__SetPageBuddy(page);
@@ -503,21 +505,31 @@ __find_buddy_index(unsigned long page_idx, unsigned int order)
* For recording page's order, we use page_private(page).
*/
static inline int page_is_buddy(struct page *page, struct page *buddy,
- int order)
+ unsigned int order)
{
if (!pfn_valid_within(page_to_pfn(buddy)))
return 0;
- if (page_zone_id(page) != page_zone_id(buddy))
- return 0;
-
if (page_is_guard(buddy) && page_order(buddy) == order) {
VM_BUG_ON_PAGE(page_count(buddy) != 0, buddy);
+
+ if (page_zone_id(page) != page_zone_id(buddy))
+ return 0;
+
return 1;
}
if (PageBuddy(buddy) && page_order(buddy) == order) {
VM_BUG_ON_PAGE(page_count(buddy) != 0, buddy);
+
+ /*
+ * zone check is done late to avoid uselessly
+ * calculating zone/node ids for pages that could
+ * never merge.
+ */
+ if (page_zone_id(page) != page_zone_id(buddy))
+ return 0;
+
return 1;
}
return 0;
@@ -549,6 +561,7 @@ static inline int page_is_buddy(struct page *page, struct page *buddy,
*/
static inline void __free_one_page(struct page *page,
+ unsigned long pfn,
struct zone *zone, unsigned int order,
int migratetype)
{
@@ -565,7 +578,7 @@ static inline void __free_one_page(struct page *page,
VM_BUG_ON(migratetype == -1);
- page_idx = page_to_pfn(page) & ((1 << MAX_ORDER) - 1);
+ page_idx = pfn & ((1 << MAX_ORDER) - 1);
VM_BUG_ON_PAGE(page_idx & ((1 << order) - 1), page);
VM_BUG_ON_PAGE(bad_range(zone, page), page);
@@ -700,7 +713,7 @@ static void free_pcppages_bulk(struct zone *zone, int count,
list_del(&page->lru);
mt = get_freepage_migratetype(page);
/* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */
- __free_one_page(page, zone, 0, mt);
+ __free_one_page(page, page_to_pfn(page), zone, 0, mt);
trace_mm_page_pcpu_drain(page, 0, mt);
if (likely(!is_migrate_isolate_page(page))) {
__mod_zone_page_state(zone, NR_FREE_PAGES, 1);
@@ -712,13 +725,15 @@ static void free_pcppages_bulk(struct zone *zone, int count,
spin_unlock(&zone->lock);
}
-static void free_one_page(struct zone *zone, struct page *page, int order,
+static void free_one_page(struct zone *zone,
+ struct page *page, unsigned long pfn,
+ unsigned int order,
int migratetype)
{
spin_lock(&zone->lock);
zone->pages_scanned = 0;
- __free_one_page(page, zone, order, migratetype);
+ __free_one_page(page, pfn, zone, order, migratetype);
if (unlikely(!is_migrate_isolate(migratetype)))
__mod_zone_freepage_state(zone, 1 << order, migratetype);
spin_unlock(&zone->lock);
@@ -755,15 +770,16 @@ static void __free_pages_ok(struct page *page, unsigned int order)
{
unsigned long flags;
int migratetype;
+ unsigned long pfn = page_to_pfn(page);
if (!free_pages_prepare(page, order))
return;
+ migratetype = get_pfnblock_migratetype(page, pfn);
local_irq_save(flags);
__count_vm_events(PGFREE, 1 << order);
- migratetype = get_pageblock_migratetype(page);
set_freepage_migratetype(page, migratetype);
- free_one_page(page_zone(page), page, order, migratetype);
+ free_one_page(page_zone(page), page, pfn, order, migratetype);
local_irq_restore(flags);
}
@@ -882,7 +898,7 @@ static inline int check_new_page(struct page *page)
return 0;
}
-static int prep_new_page(struct page *page, int order, gfp_t gfp_flags)
+static int prep_new_page(struct page *page, unsigned int order, gfp_t gfp_flags)
{
int i;
@@ -931,6 +947,7 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order,
rmv_page_order(page);
area->nr_free--;
expand(zone, page, order, current_order, area, migratetype);
+ set_freepage_migratetype(page, migratetype);
return page;
}
@@ -1057,7 +1074,9 @@ static int try_to_steal_freepages(struct zone *zone, struct page *page,
/*
* When borrowing from MIGRATE_CMA, we need to release the excess
- * buddy pages to CMA itself.
+ * buddy pages to CMA itself. We also ensure the freepage_migratetype
+ * is set to CMA so it is returned to the correct freelist in case
+ * the page ends up being not actually allocated from the pcp lists.
*/
if (is_migrate_cma(fallback_type))
return fallback_type;
@@ -1090,16 +1109,17 @@ static int try_to_steal_freepages(struct zone *zone, struct page *page,
/* Remove an element from the buddy allocator from the fallback list */
static inline struct page *
-__rmqueue_fallback(struct zone *zone, int order, int start_migratetype)
+__rmqueue_fallback(struct zone *zone, unsigned int order, int start_migratetype)
{
struct free_area *area;
- int current_order;
+ unsigned int current_order;
struct page *page;
int migratetype, new_type, i;
/* Find the largest possible block of pages in the other list */
- for (current_order = MAX_ORDER-1; current_order >= order;
- --current_order) {
+ for (current_order = MAX_ORDER-1;
+ current_order >= order && current_order <= MAX_ORDER-1;
+ --current_order) {
for (i = 0;; i++) {
migratetype = fallbacks[start_migratetype][i];
@@ -1125,6 +1145,12 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype)
expand(zone, page, order, current_order, area,
new_type);
+ /* The freepage_migratetype may differ from pageblock's
+ * migratetype depending on the decisions in
+ * try_to_steal_freepages. This is OK as long as it does
+ * not differ for MIGRATE_CMA type.
+ */
+ set_freepage_migratetype(page, new_type);
trace_mm_page_alloc_extfrag(page, order, current_order,
start_migratetype, migratetype, new_type);
@@ -1173,9 +1199,9 @@ retry_reserve:
*/
static int rmqueue_bulk(struct zone *zone, unsigned int order,
unsigned long count, struct list_head *list,
- int migratetype, int cold)
+ int migratetype, bool cold)
{
- int mt = migratetype, i;
+ int i;
spin_lock(&zone->lock);
for (i = 0; i < count; ++i) {
@@ -1192,18 +1218,12 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
* merge IO requests if the physical pages are ordered
* properly.
*/
- if (likely(cold == 0))
+ if (likely(!cold))
list_add(&page->lru, list);
else
list_add_tail(&page->lru, list);
- if (IS_ENABLED(CONFIG_CMA)) {
- mt = get_pageblock_migratetype(page);
- if (!is_migrate_cma(mt) && !is_migrate_isolate(mt))
- mt = migratetype;
- }
- set_freepage_migratetype(page, mt);
list = &page->lru;
- if (is_migrate_cma(mt))
+ if (is_migrate_cma(get_freepage_migratetype(page)))
__mod_zone_page_state(zone, NR_FREE_CMA_PAGES,
-(1 << order));
}
@@ -1327,7 +1347,7 @@ void mark_free_pages(struct zone *zone)
{
unsigned long pfn, max_zone_pfn;
unsigned long flags;
- int order, t;
+ unsigned int order, t;
struct list_head *curr;
if (zone_is_empty(zone))
@@ -1359,19 +1379,20 @@ void mark_free_pages(struct zone *zone)
/*
* Free a 0-order page
- * cold == 1 ? free a cold page : free a hot page
+ * cold == true ? free a cold page : free a hot page
*/
-void free_hot_cold_page(struct page *page, int cold)
+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 (!free_pages_prepare(page, 0))
return;
- migratetype = get_pageblock_migratetype(page);
+ migratetype = get_pfnblock_migratetype(page, pfn);
set_freepage_migratetype(page, migratetype);
local_irq_save(flags);
__count_vm_event(PGFREE);
@@ -1385,17 +1406,17 @@ void free_hot_cold_page(struct page *page, int cold)
*/
if (migratetype >= MIGRATE_PCPTYPES) {
if (unlikely(is_migrate_isolate(migratetype))) {
- free_one_page(zone, page, 0, migratetype);
+ free_one_page(zone, page, pfn, 0, migratetype);
goto out;
}
migratetype = MIGRATE_MOVABLE;
}
pcp = &this_cpu_ptr(zone->pageset)->pcp;
- if (cold)
- list_add_tail(&page->lru, &pcp->lists[migratetype]);
- else
+ if (!cold)
list_add(&page->lru, &pcp->lists[migratetype]);
+ else
+ list_add_tail(&page->lru, &pcp->lists[migratetype]);
pcp->count++;
if (pcp->count >= pcp->high) {
unsigned long batch = ACCESS_ONCE(pcp->batch);
@@ -1410,7 +1431,7 @@ out:
/*
* Free a list of 0-order pages
*/
-void free_hot_cold_page_list(struct list_head *list, int cold)
+void free_hot_cold_page_list(struct list_head *list, bool cold)
{
struct page *page, *next;
@@ -1522,12 +1543,12 @@ int split_free_page(struct page *page)
*/
static inline
struct page *buffered_rmqueue(struct zone *preferred_zone,
- struct zone *zone, int order, gfp_t gfp_flags,
- int migratetype)
+ struct zone *zone, unsigned int order,
+ gfp_t gfp_flags, int migratetype)
{
unsigned long flags;
struct page *page;
- int cold = !!(gfp_flags & __GFP_COLD);
+ bool cold = ((gfp_flags & __GFP_COLD) != 0);
again:
if (likely(order == 0)) {
@@ -1572,7 +1593,7 @@ again:
if (!page)
goto failed;
__mod_zone_freepage_state(zone, -(1 << order),
- get_pageblock_migratetype(page));
+ get_freepage_migratetype(page));
}
__mod_zone_page_state(zone, NR_ALLOC_BATCH, -(1 << order));
@@ -1672,8 +1693,9 @@ static inline bool should_fail_alloc_page(gfp_t gfp_mask, unsigned int order)
* Return true if free pages are above 'mark'. This takes into account the order
* of the allocation.
*/
-static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
- int classzone_idx, int alloc_flags, long free_pages)
+static bool __zone_watermark_ok(struct zone *z, unsigned int order,
+ unsigned long mark, int classzone_idx, int alloc_flags,
+ long free_pages)
{
/* free_pages my go negative - that's OK */
long min = mark;
@@ -1707,15 +1729,15 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
return true;
}
-bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
+bool zone_watermark_ok(struct zone *z, unsigned int order, unsigned long mark,
int classzone_idx, int alloc_flags)
{
return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
zone_page_state(z, NR_FREE_PAGES));
}
-bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
- int classzone_idx, int alloc_flags)
+bool zone_watermark_ok_safe(struct zone *z, unsigned int order,
+ unsigned long mark, int classzone_idx, int alloc_flags)
{
long free_pages = zone_page_state(z, NR_FREE_PAGES);
@@ -1850,18 +1872,8 @@ static bool zone_local(struct zone *local_zone, struct zone *zone)
static bool zone_allows_reclaim(struct zone *local_zone, struct zone *zone)
{
- return node_isset(local_zone->node, zone->zone_pgdat->reclaim_nodes);
-}
-
-static void __paginginit init_zone_allows_reclaim(int nid)
-{
- int i;
-
- for_each_node_state(i, N_MEMORY)
- if (node_distance(nid, i) <= RECLAIM_DISTANCE)
- node_set(i, NODE_DATA(nid)->reclaim_nodes);
- else
- zone_reclaim_mode = 1;
+ return node_distance(zone_to_nid(local_zone), zone_to_nid(zone)) <
+ RECLAIM_DISTANCE;
}
#else /* CONFIG_NUMA */
@@ -1895,9 +1907,6 @@ static bool zone_allows_reclaim(struct zone *local_zone, struct zone *zone)
return true;
}
-static inline void init_zone_allows_reclaim(int nid)
-{
-}
#endif /* CONFIG_NUMA */
/*
@@ -1907,17 +1916,17 @@ static inline void init_zone_allows_reclaim(int nid)
static struct page *
get_page_from_freelist(gfp_t gfp_mask, nodemask_t *nodemask, unsigned int order,
struct zonelist *zonelist, int high_zoneidx, int alloc_flags,
- struct zone *preferred_zone, int migratetype)
+ struct zone *preferred_zone, int classzone_idx, int migratetype)
{
struct zoneref *z;
struct page *page = NULL;
- int classzone_idx;
struct zone *zone;
nodemask_t *allowednodes = NULL;/* zonelist_cache approximation */
int zlc_active = 0; /* set if using zonelist_cache */
int did_zlc_setup = 0; /* just call zlc_setup() one time */
+ bool consider_zone_dirty = (alloc_flags & ALLOC_WMARK_LOW) &&
+ (gfp_mask & __GFP_WRITE);
- classzone_idx = zone_idx(preferred_zone);
zonelist_scan:
/*
* Scan zonelist, looking for a zone with enough free.
@@ -1930,12 +1939,10 @@ zonelist_scan:
if (IS_ENABLED(CONFIG_NUMA) && zlc_active &&
!zlc_zone_worth_trying(zonelist, z, allowednodes))
continue;
- if ((alloc_flags & ALLOC_CPUSET) &&
+ if (cpusets_enabled() &&
+ (alloc_flags & ALLOC_CPUSET) &&
!cpuset_zone_allowed_softwall(zone, gfp_mask))
continue;
- BUILD_BUG_ON(ALLOC_NO_WATERMARKS < NR_WMARK);
- if (unlikely(alloc_flags & ALLOC_NO_WATERMARKS))
- goto try_this_zone;
/*
* Distribute pages in proportion to the individual
* zone size to ensure fair page aging. The zone a
@@ -1974,15 +1981,19 @@ zonelist_scan:
* will require awareness of zones in the
* dirty-throttling and the flusher threads.
*/
- if ((alloc_flags & ALLOC_WMARK_LOW) &&
- (gfp_mask & __GFP_WRITE) && !zone_dirty_ok(zone))
- goto this_zone_full;
+ if (consider_zone_dirty && !zone_dirty_ok(zone))
+ continue;
mark = zone->watermark[alloc_flags & ALLOC_WMARK_MASK];
if (!zone_watermark_ok(zone, order, mark,
classzone_idx, alloc_flags)) {
int ret;
+ /* Checked here to keep the fast path fast */
+ BUILD_BUG_ON(ALLOC_NO_WATERMARKS < NR_WMARK);
+ if (alloc_flags & ALLOC_NO_WATERMARKS)
+ goto try_this_zone;
+
if (IS_ENABLED(CONFIG_NUMA) &&
!did_zlc_setup && nr_online_nodes > 1) {
/*
@@ -2044,7 +2055,7 @@ try_this_zone:
if (page)
break;
this_zone_full:
- if (IS_ENABLED(CONFIG_NUMA))
+ if (IS_ENABLED(CONFIG_NUMA) && zlc_active)
zlc_mark_zone_full(zonelist, z);
}
@@ -2173,7 +2184,7 @@ static inline struct page *
__alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, struct zone *preferred_zone,
- int migratetype)
+ int classzone_idx, int migratetype)
{
struct page *page;
@@ -2191,7 +2202,7 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, nodemask,
order, zonelist, high_zoneidx,
ALLOC_WMARK_HIGH|ALLOC_CPUSET,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
if (page)
goto out;
@@ -2226,7 +2237,7 @@ static struct page *
__alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, int alloc_flags, struct zone *preferred_zone,
- int migratetype, bool sync_migration,
+ int classzone_idx, int migratetype, enum migrate_mode mode,
bool *contended_compaction, bool *deferred_compaction,
unsigned long *did_some_progress)
{
@@ -2240,7 +2251,7 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
current->flags |= PF_MEMALLOC;
*did_some_progress = try_to_compact_pages(zonelist, order, gfp_mask,
- nodemask, sync_migration,
+ nodemask, mode,
contended_compaction);
current->flags &= ~PF_MEMALLOC;
@@ -2254,7 +2265,7 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
page = get_page_from_freelist(gfp_mask, nodemask,
order, zonelist, high_zoneidx,
alloc_flags & ~ALLOC_NO_WATERMARKS,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
if (page) {
preferred_zone->compact_blockskip_flush = false;
compaction_defer_reset(preferred_zone, order, true);
@@ -2273,7 +2284,7 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
* As async compaction considers a subset of pageblocks, only
* defer if the failure was a sync compaction failure.
*/
- if (sync_migration)
+ if (mode != MIGRATE_ASYNC)
defer_compaction(preferred_zone, order);
cond_resched();
@@ -2286,9 +2297,9 @@ static inline struct page *
__alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, int alloc_flags, struct zone *preferred_zone,
- int migratetype, bool sync_migration,
- bool *contended_compaction, bool *deferred_compaction,
- unsigned long *did_some_progress)
+ int classzone_idx, int migratetype,
+ enum migrate_mode mode, bool *contended_compaction,
+ bool *deferred_compaction, unsigned long *did_some_progress)
{
return NULL;
}
@@ -2327,7 +2338,7 @@ static inline struct page *
__alloc_pages_direct_reclaim(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, int alloc_flags, struct zone *preferred_zone,
- int migratetype, unsigned long *did_some_progress)
+ int classzone_idx, int migratetype, unsigned long *did_some_progress)
{
struct page *page = NULL;
bool drained = false;
@@ -2345,7 +2356,8 @@ retry:
page = get_page_from_freelist(gfp_mask, nodemask, order,
zonelist, high_zoneidx,
alloc_flags & ~ALLOC_NO_WATERMARKS,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx,
+ migratetype);
/*
* If an allocation failed after direct reclaim, it could be because
@@ -2368,14 +2380,14 @@ static inline struct page *
__alloc_pages_high_priority(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, struct zone *preferred_zone,
- int migratetype)
+ int classzone_idx, int migratetype)
{
struct page *page;
do {
page = get_page_from_freelist(gfp_mask, nodemask, order,
zonelist, high_zoneidx, ALLOC_NO_WATERMARKS,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
if (!page && gfp_mask & __GFP_NOFAIL)
wait_iff_congested(preferred_zone, BLK_RW_ASYNC, HZ/50);
@@ -2476,14 +2488,14 @@ static inline struct page *
__alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, struct zone *preferred_zone,
- int migratetype)
+ int classzone_idx, int migratetype)
{
const gfp_t wait = gfp_mask & __GFP_WAIT;
struct page *page = NULL;
int alloc_flags;
unsigned long pages_reclaimed = 0;
unsigned long did_some_progress;
- bool sync_migration = false;
+ enum migrate_mode migration_mode = MIGRATE_ASYNC;
bool deferred_compaction = false;
bool contended_compaction = false;
@@ -2525,15 +2537,18 @@ restart:
* Find the true preferred zone if the allocation is unconstrained by
* cpusets.
*/
- if (!(alloc_flags & ALLOC_CPUSET) && !nodemask)
- first_zones_zonelist(zonelist, high_zoneidx, NULL,
- &preferred_zone);
+ if (!(alloc_flags & ALLOC_CPUSET) && !nodemask) {
+ struct zoneref *preferred_zoneref;
+ preferred_zoneref = first_zones_zonelist(zonelist, high_zoneidx,
+ NULL, &preferred_zone);
+ classzone_idx = zonelist_zone_idx(preferred_zoneref);
+ }
rebalance:
/* This is the last chance, in general, before the goto nopage. */
page = get_page_from_freelist(gfp_mask, nodemask, order, zonelist,
high_zoneidx, alloc_flags & ~ALLOC_NO_WATERMARKS,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
if (page)
goto got_pg;
@@ -2548,7 +2563,7 @@ rebalance:
page = __alloc_pages_high_priority(gfp_mask, order,
zonelist, high_zoneidx, nodemask,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
if (page) {
goto got_pg;
}
@@ -2577,17 +2592,23 @@ rebalance:
* Try direct compaction. The first pass is asynchronous. Subsequent
* attempts after direct reclaim are synchronous
*/
- page = __alloc_pages_direct_compact(gfp_mask, order,
- zonelist, high_zoneidx,
- nodemask,
- alloc_flags, preferred_zone,
- migratetype, sync_migration,
- &contended_compaction,
+ page = __alloc_pages_direct_compact(gfp_mask, order, zonelist,
+ high_zoneidx, nodemask, alloc_flags,
+ preferred_zone,
+ classzone_idx, migratetype,
+ migration_mode, &contended_compaction,
&deferred_compaction,
&did_some_progress);
if (page)
goto got_pg;
- sync_migration = true;
+
+ /*
+ * It can become very expensive to allocate transparent hugepages at
+ * fault, so use asynchronous memory compaction for THP unless it is
+ * khugepaged trying to collapse.
+ */
+ if (!(gfp_mask & __GFP_NO_KSWAPD) || (current->flags & PF_KTHREAD))
+ migration_mode = MIGRATE_SYNC_LIGHT;
/*
* If compaction is deferred for high-order allocations, it is because
@@ -2604,7 +2625,8 @@ rebalance:
zonelist, high_zoneidx,
nodemask,
alloc_flags, preferred_zone,
- migratetype, &did_some_progress);
+ classzone_idx, migratetype,
+ &did_some_progress);
if (page)
goto got_pg;
@@ -2623,7 +2645,7 @@ rebalance:
page = __alloc_pages_may_oom(gfp_mask, order,
zonelist, high_zoneidx,
nodemask, preferred_zone,
- migratetype);
+ classzone_idx, migratetype);
if (page)
goto got_pg;
@@ -2662,12 +2684,11 @@ rebalance:
* direct reclaim and reclaim/compaction depends on compaction
* being called after reclaim so call directly if necessary
*/
- page = __alloc_pages_direct_compact(gfp_mask, order,
- zonelist, high_zoneidx,
- nodemask,
- alloc_flags, preferred_zone,
- migratetype, sync_migration,
- &contended_compaction,
+ page = __alloc_pages_direct_compact(gfp_mask, order, zonelist,
+ high_zoneidx, nodemask, alloc_flags,
+ preferred_zone,
+ classzone_idx, migratetype,
+ migration_mode, &contended_compaction,
&deferred_compaction,
&did_some_progress);
if (page)
@@ -2693,11 +2714,12 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
{
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
struct zone *preferred_zone;
+ struct zoneref *preferred_zoneref;
struct page *page = NULL;
int migratetype = allocflags_to_migratetype(gfp_mask);
unsigned int cpuset_mems_cookie;
int alloc_flags = ALLOC_WMARK_LOW|ALLOC_CPUSET|ALLOC_FAIR;
- struct mem_cgroup *memcg = NULL;
+ int classzone_idx;
gfp_mask &= gfp_allowed_mask;
@@ -2716,22 +2738,16 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
if (unlikely(!zonelist->_zonerefs->zone))
return NULL;
- /*
- * Will only have any effect when __GFP_KMEMCG is set. This is
- * verified in the (always inline) callee
- */
- if (!memcg_kmem_newpage_charge(gfp_mask, &memcg, order))
- return NULL;
-
retry_cpuset:
cpuset_mems_cookie = read_mems_allowed_begin();
/* The preferred zone is used for statistics later */
- first_zones_zonelist(zonelist, high_zoneidx,
+ preferred_zoneref = first_zones_zonelist(zonelist, high_zoneidx,
nodemask ? : &cpuset_current_mems_allowed,
&preferred_zone);
if (!preferred_zone)
goto out;
+ classzone_idx = zonelist_zone_idx(preferred_zoneref);
#ifdef CONFIG_CMA
if (allocflags_to_migratetype(gfp_mask) == MIGRATE_MOVABLE)
@@ -2741,7 +2757,7 @@ retry:
/* First allocation attempt */
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, nodemask, order,
zonelist, high_zoneidx, alloc_flags,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
if (unlikely(!page)) {
/*
* The first pass makes sure allocations are spread
@@ -2767,7 +2783,7 @@ retry:
gfp_mask = memalloc_noio_flags(gfp_mask);
page = __alloc_pages_slowpath(gfp_mask, order,
zonelist, high_zoneidx, nodemask,
- preferred_zone, migratetype);
+ preferred_zone, classzone_idx, migratetype);
}
trace_mm_page_alloc(page, order, gfp_mask, migratetype);
@@ -2782,8 +2798,6 @@ out:
if (unlikely(!page && read_mems_allowed_retry(cpuset_mems_cookie)))
goto retry_cpuset;
- memcg_kmem_commit_charge(page, memcg, order);
-
return page;
}
EXPORT_SYMBOL(__alloc_pages_nodemask);
@@ -2818,7 +2832,7 @@ void __free_pages(struct page *page, unsigned int order)
{
if (put_page_testzero(page)) {
if (order == 0)
- free_hot_cold_page(page, 0);
+ free_hot_cold_page(page, false);
else
__free_pages_ok(page, order);
}
@@ -2837,27 +2851,51 @@ void free_pages(unsigned long addr, unsigned int order)
EXPORT_SYMBOL(free_pages);
/*
- * __free_memcg_kmem_pages and free_memcg_kmem_pages will free
- * pages allocated with __GFP_KMEMCG.
- *
- * Those pages are accounted to a particular memcg, embedded in the
- * corresponding page_cgroup. To avoid adding a hit in the allocator to search
- * for that information only to find out that it is NULL for users who have no
- * interest in that whatsoever, we provide these functions.
+ * alloc_kmem_pages charges newly allocated pages to the kmem resource counter
+ * of the current memory cgroup.
*
- * The caller knows better which flags it relies on.
+ * It should be used when the caller would like to use kmalloc, but since the
+ * allocation is large, it has to fall back to the page allocator.
*/
-void __free_memcg_kmem_pages(struct page *page, unsigned int order)
+struct page *alloc_kmem_pages(gfp_t gfp_mask, unsigned int order)
+{
+ struct page *page;
+ struct mem_cgroup *memcg = NULL;
+
+ if (!memcg_kmem_newpage_charge(gfp_mask, &memcg, order))
+ return NULL;
+ page = alloc_pages(gfp_mask, order);
+ memcg_kmem_commit_charge(page, memcg, order);
+ return page;
+}
+
+struct page *alloc_kmem_pages_node(int nid, gfp_t gfp_mask, unsigned int order)
+{
+ struct page *page;
+ struct mem_cgroup *memcg = NULL;
+
+ if (!memcg_kmem_newpage_charge(gfp_mask, &memcg, order))
+ return NULL;
+ page = alloc_pages_node(nid, gfp_mask, order);
+ memcg_kmem_commit_charge(page, memcg, order);
+ return page;
+}
+
+/*
+ * __free_kmem_pages and free_kmem_pages will free pages allocated with
+ * alloc_kmem_pages.
+ */
+void __free_kmem_pages(struct page *page, unsigned int order)
{
memcg_kmem_uncharge_pages(page, order);
__free_pages(page, order);
}
-void free_memcg_kmem_pages(unsigned long addr, unsigned int order)
+void free_kmem_pages(unsigned long addr, unsigned int order)
{
if (addr != 0) {
VM_BUG_ON(!virt_addr_valid((void *)addr));
- __free_memcg_kmem_pages(virt_to_page((void *)addr), order);
+ __free_kmem_pages(virt_to_page((void *)addr), order);
}
}
@@ -4095,7 +4133,7 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
static void __meminit zone_init_free_lists(struct zone *zone)
{
- int order, t;
+ unsigned int order, t;
for_each_migratetype_order(order, t) {
INIT_LIST_HEAD(&zone->free_area[order].free_list[t]);
zone->free_area[order].nr_free = 0;
@@ -4349,9 +4387,6 @@ int __meminit init_currently_empty_zone(struct zone *zone,
#ifndef CONFIG_HAVE_ARCH_EARLY_PFN_TO_NID
/*
* Required by SPARSEMEM. Given a PFN, return what node the PFN is on.
- * Architectures may implement their own version but if add_active_range()
- * was used and there are no special requirements, this is a convenient
- * alternative
*/
int __meminit __early_pfn_to_nid(unsigned long pfn)
{
@@ -4406,10 +4441,9 @@ bool __meminit early_pfn_in_nid(unsigned long pfn, int node)
* @nid: The node to free memory on. If MAX_NUMNODES, all nodes are freed.
* @max_low_pfn: The highest PFN that will be passed to memblock_free_early_nid
*
- * If an architecture guarantees that all ranges registered with
- * add_active_ranges() contain no holes and may be freed, this
- * this function may be used instead of calling memblock_free_early_nid()
- * manually.
+ * If an architecture guarantees that all ranges registered contain no holes
+ * and may be freed, this this function may be used instead of calling
+ * memblock_free_early_nid() manually.
*/
void __init free_bootmem_with_active_regions(int nid, unsigned long max_low_pfn)
{
@@ -4431,9 +4465,8 @@ void __init free_bootmem_with_active_regions(int nid, unsigned long max_low_pfn)
* sparse_memory_present_with_active_regions - Call memory_present for each active range
* @nid: The node to call memory_present for. If MAX_NUMNODES, all nodes will be used.
*
- * If an architecture guarantees that all ranges registered with
- * add_active_ranges() contain no holes and may be freed, this
- * function may be used instead of calling memory_present() manually.
+ * If an architecture guarantees that all ranges registered contain no holes and may
+ * be freed, this function may be used instead of calling memory_present() manually.
*/
void __init sparse_memory_present_with_active_regions(int nid)
{
@@ -4451,7 +4484,7 @@ void __init sparse_memory_present_with_active_regions(int nid)
* @end_pfn: Passed by reference. On return, it will have the node end_pfn.
*
* It returns the start and end page frame of a node based on information
- * provided by an arch calling add_active_range(). If called for a node
+ * provided by memblock_set_node(). If called for a node
* with no available memory, a warning is printed and the start and end
* PFNs will be 0.
*/
@@ -4921,8 +4954,6 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
pgdat->node_id = nid;
pgdat->node_start_pfn = node_start_pfn;
- if (node_state(nid, N_MEMORY))
- init_zone_allows_reclaim(nid);
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
#endif
@@ -5030,7 +5061,7 @@ static unsigned long __init find_min_pfn_for_node(int nid)
* find_min_pfn_with_active_regions - Find the minimum PFN registered
*
* It returns the minimum PFN based on information provided via
- * add_active_range().
+ * memblock_set_node().
*/
unsigned long __init find_min_pfn_with_active_regions(void)
{
@@ -5251,7 +5282,7 @@ static void check_for_memory(pg_data_t *pgdat, int nid)
* @max_zone_pfn: an array of max PFNs for each zone
*
* This will call free_area_init_node() for each active node in the system.
- * Using the page ranges provided by add_active_range(), the size of each
+ * Using the page ranges provided by memblock_set_node(), the size of each
* zone in each node and their holes is calculated. If the maximum PFN
* between two adjacent zones match, it is assumed that the zone is empty.
* For example, if arch_max_dma_pfn == arch_max_dma32_pfn, it is assumed
@@ -6009,53 +6040,64 @@ static inline int pfn_to_bitidx(struct zone *zone, unsigned long pfn)
* @end_bitidx: The last bit of interest
* returns pageblock_bits flags
*/
-unsigned long get_pageblock_flags_group(struct page *page,
- int start_bitidx, int end_bitidx)
+unsigned long get_pfnblock_flags_mask(struct page *page, unsigned long pfn,
+ unsigned long end_bitidx,
+ unsigned long mask)
{
struct zone *zone;
unsigned long *bitmap;
- unsigned long pfn, bitidx;
- unsigned long flags = 0;
- unsigned long value = 1;
+ unsigned long bitidx, word_bitidx;
+ unsigned long word;
zone = page_zone(page);
- pfn = page_to_pfn(page);
bitmap = get_pageblock_bitmap(zone, pfn);
bitidx = pfn_to_bitidx(zone, pfn);
+ word_bitidx = bitidx / BITS_PER_LONG;
+ bitidx &= (BITS_PER_LONG-1);
- for (; start_bitidx <= end_bitidx; start_bitidx++, value <<= 1)
- if (test_bit(bitidx + start_bitidx, bitmap))
- flags |= value;
-
- return flags;
+ word = bitmap[word_bitidx];
+ bitidx += end_bitidx;
+ return (word >> (BITS_PER_LONG - bitidx - 1)) & mask;
}
/**
- * set_pageblock_flags_group - Set the requested group of flags for a pageblock_nr_pages block of pages
+ * set_pfnblock_flags_mask - Set the requested group of flags for a pageblock_nr_pages block of pages
* @page: The page within the block of interest
* @start_bitidx: The first bit of interest
* @end_bitidx: The last bit of interest
* @flags: The flags to set
*/
-void set_pageblock_flags_group(struct page *page, unsigned long flags,
- int start_bitidx, int end_bitidx)
+void set_pfnblock_flags_mask(struct page *page, unsigned long flags,
+ unsigned long pfn,
+ unsigned long end_bitidx,
+ unsigned long mask)
{
struct zone *zone;
unsigned long *bitmap;
- unsigned long pfn, bitidx;
- unsigned long value = 1;
+ unsigned long bitidx, word_bitidx;
+ unsigned long old_word, word;
+
+ BUILD_BUG_ON(NR_PAGEBLOCK_BITS != 4);
zone = page_zone(page);
- pfn = page_to_pfn(page);
bitmap = get_pageblock_bitmap(zone, pfn);
bitidx = pfn_to_bitidx(zone, pfn);
+ word_bitidx = bitidx / BITS_PER_LONG;
+ bitidx &= (BITS_PER_LONG-1);
+
VM_BUG_ON_PAGE(!zone_spans_pfn(zone, pfn), page);
- for (; start_bitidx <= end_bitidx; start_bitidx++, value <<= 1)
- if (flags & value)
- __set_bit(bitidx + start_bitidx, bitmap);
- else
- __clear_bit(bitidx + start_bitidx, bitmap);
+ bitidx += end_bitidx;
+ mask <<= (BITS_PER_LONG - bitidx - 1);
+ flags <<= (BITS_PER_LONG - bitidx - 1);
+
+ word = ACCESS_ONCE(bitmap[word_bitidx]);
+ for (;;) {
+ old_word = cmpxchg(&bitmap[word_bitidx], word, (word & ~mask) | flags);
+ if (word == old_word)
+ break;
+ word = old_word;
+ }
}
/*
@@ -6215,7 +6257,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
cc->nr_migratepages -= nr_reclaimed;
ret = migrate_pages(&cc->migratepages, alloc_migrate_target,
- 0, MIGRATE_SYNC, MR_CMA);
+ NULL, 0, cc->mode, MR_CMA);
}
if (ret < 0) {
putback_movable_pages(&cc->migratepages);
@@ -6254,7 +6296,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
.nr_migratepages = 0,
.order = -1,
.zone = page_zone(pfn_to_page(start)),
- .sync = true,
+ .mode = MIGRATE_SYNC,
.ignore_skip_hint = true,
};
INIT_LIST_HEAD(&cc.migratepages);
@@ -6409,7 +6451,7 @@ __offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn)
{
struct page *page;
struct zone *zone;
- int order, i;
+ unsigned int order, i;
unsigned long pfn;
unsigned long flags;
/* find the first valid pfn */
@@ -6461,7 +6503,7 @@ bool is_free_buddy_page(struct page *page)
struct zone *zone = page_zone(page);
unsigned long pfn = page_to_pfn(page);
unsigned long flags;
- int order;
+ unsigned int order;
spin_lock_irqsave(&zone->lock, flags);
for (order = 0; order < MAX_ORDER; order++) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 03:08:37 +0000