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-rw-r--r--mm/page_alloc.c64
1 files changed, 9 insertions, 55 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4ba5e37127fc..df2022ff0c8a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -221,11 +221,6 @@ EXPORT_SYMBOL(nr_online_nodes);
int page_group_by_mobility_disabled __read_mostly;
-/*
- * NOTE:
- * Don't use set_pageblock_migratetype(page, MIGRATE_ISOLATE) directly.
- * Instead, use {un}set_pageblock_isolate.
- */
void set_pageblock_migratetype(struct page *page, int migratetype)
{
@@ -1389,14 +1384,8 @@ void split_page(struct page *page, unsigned int order)
set_page_refcounted(page + i);
}
-/*
- * Similar to the split_page family of functions except that the page
- * required at the given order and being isolated now to prevent races
- * with parallel allocators
- */
-int capture_free_page(struct page *page, int alloc_order, int migratetype)
+static int __isolate_free_page(struct page *page, unsigned int order)
{
- unsigned int order;
unsigned long watermark;
struct zone *zone;
int mt;
@@ -1404,7 +1393,6 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
BUG_ON(!PageBuddy(page));
zone = page_zone(page);
- order = page_order(page);
mt = get_pageblock_migratetype(page);
if (mt != MIGRATE_ISOLATE) {
@@ -1413,7 +1401,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
return 0;
- __mod_zone_freepage_state(zone, -(1UL << alloc_order), mt);
+ __mod_zone_freepage_state(zone, -(1UL << order), mt);
}
/* Remove page from free list */
@@ -1421,11 +1409,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
zone->free_area[order].nr_free--;
rmv_page_order(page);
- if (alloc_order != order)
- expand(zone, page, alloc_order, order,
- &zone->free_area[order], migratetype);
-
- /* Set the pageblock if the captured page is at least a pageblock */
+ /* Set the pageblock if the isolated page is at least a pageblock */
if (order >= pageblock_order - 1) {
struct page *endpage = page + (1 << order) - 1;
for (; page < endpage; page += pageblock_nr_pages) {
@@ -1436,7 +1420,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
}
}
- return 1UL << alloc_order;
+ return 1UL << order;
}
/*
@@ -1454,10 +1438,9 @@ int split_free_page(struct page *page)
unsigned int order;
int nr_pages;
- BUG_ON(!PageBuddy(page));
order = page_order(page);
- nr_pages = capture_free_page(page, order, 0);
+ nr_pages = __isolate_free_page(page, order);
if (!nr_pages)
return 0;
@@ -1655,20 +1638,6 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark,
return true;
}
-#ifdef CONFIG_MEMORY_ISOLATION
-static inline unsigned long nr_zone_isolate_freepages(struct zone *zone)
-{
- if (unlikely(zone->nr_pageblock_isolate))
- return zone->nr_pageblock_isolate * pageblock_nr_pages;
- return 0;
-}
-#else
-static inline unsigned long nr_zone_isolate_freepages(struct zone *zone)
-{
- return 0;
-}
-#endif
-
bool zone_watermark_ok(struct zone *z, int order, unsigned long mark,
int classzone_idx, int alloc_flags)
{
@@ -1684,14 +1653,6 @@ bool zone_watermark_ok_safe(struct zone *z, int order, unsigned long mark,
if (z->percpu_drift_mark && free_pages < z->percpu_drift_mark)
free_pages = zone_page_state_snapshot(z, NR_FREE_PAGES);
- /*
- * If the zone has MIGRATE_ISOLATE type free pages, we should consider
- * it. nr_zone_isolate_freepages is never accurate so kswapd might not
- * sleep although it could do so. But this is more desirable for memory
- * hotplug than sleeping which can cause a livelock in the direct
- * reclaim path.
- */
- free_pages -= nr_zone_isolate_freepages(z);
return __zone_watermark_ok(z, order, mark, classzone_idx, alloc_flags,
free_pages);
}
@@ -2163,8 +2124,6 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
bool *contended_compaction, bool *deferred_compaction,
unsigned long *did_some_progress)
{
- struct page *page = NULL;
-
if (!order)
return NULL;
@@ -2176,16 +2135,12 @@ __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,
- contended_compaction, &page);
+ contended_compaction);
current->flags &= ~PF_MEMALLOC;
- /* If compaction captured a page, prep and use it */
- if (page) {
- prep_new_page(page, order, gfp_mask);
- goto got_page;
- }
-
if (*did_some_progress != COMPACT_SKIPPED) {
+ struct page *page;
+
/* Page migration frees to the PCP lists but we want merging */
drain_pages(get_cpu());
put_cpu();
@@ -2195,7 +2150,6 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
alloc_flags & ~ALLOC_NO_WATERMARKS,
preferred_zone, migratetype);
if (page) {
-got_page:
preferred_zone->compact_blockskip_flush = false;
preferred_zone->compact_considered = 0;
preferred_zone->compact_defer_shift = 0;
@@ -5631,7 +5585,7 @@ static inline int pfn_to_bitidx(struct zone *zone, unsigned long pfn)
pfn &= (PAGES_PER_SECTION-1);
return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
#else
- pfn = pfn - zone->zone_start_pfn;
+ pfn = pfn - round_down(zone->zone_start_pfn, pageblock_nr_pages);
return (pfn >> pageblock_order) * NR_PAGEBLOCK_BITS;
#endif /* CONFIG_SPARSEMEM */
}