X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=mm%2Fpage_alloc.c;h=6c717ad5f5c5c04b3168a14bf00bf5223938506b;hb=3e8fc0075e24338b1117cdff6a79477427b8dbed;hp=15c2050c629b1d8aacb2f36aac7ac09c54c95449;hpb=c8d2dcb3e94106395811ac86681a4439c560cbca;p=linux-2.6-microblaze.git

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 15c2050c629b..6c717ad5f5c5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1175,11 +1175,17 @@ static __always_inline bool free_pages_prepare(struct page *page,
 		debug_check_no_obj_freed(page_address(page),
 					   PAGE_SIZE << order);
 	}
-	arch_free_page(page, order);
 	if (want_init_on_free())
 		kernel_init_free_pages(page, 1 << order);
 
 	kernel_poison_pages(page, 1 << order, 0);
+	/*
+	 * arch_free_page() can make the page's contents inaccessible.  s390
+	 * does this.  So nothing which can access the page's contents should
+	 * happen after this.
+	 */
+	arch_free_page(page, order);
+
 	if (debug_pagealloc_enabled())
 		kernel_map_pages(page, 1 << order, 0);
 
@@ -1941,6 +1947,14 @@ void __init page_alloc_init_late(void)
 	/* Block until all are initialised */
 	wait_for_completion(&pgdat_init_all_done_comp);
 
+	/*
+	 * The number of managed pages has changed due to the initialisation
+	 * so the pcpu batch and high limits needs to be updated or the limits
+	 * will be artificially small.
+	 */
+	for_each_populated_zone(zone)
+		zone_pcp_update(zone);
+
 	/*
 	 * We initialized the rest of the deferred pages.  Permanently disable
 	 * on-demand struct page initialization.
@@ -4467,12 +4481,14 @@ retry_cpuset:
 		if (page)
 			goto got_pg;
 
-		 if (order >= pageblock_order && (gfp_mask & __GFP_IO)) {
+		 if (order >= pageblock_order && (gfp_mask & __GFP_IO) &&
+		     !(gfp_mask & __GFP_RETRY_MAYFAIL)) {
 			/*
 			 * If allocating entire pageblock(s) and compaction
 			 * failed because all zones are below low watermarks
 			 * or is prohibited because it recently failed at this
-			 * order, fail immediately.
+			 * order, fail immediately unless the allocator has
+			 * requested compaction and reclaim retry.
 			 *
 			 * Reclaim is
 			 *  - potentially very expensive because zones are far
@@ -8506,7 +8522,6 @@ void free_contig_range(unsigned long pfn, unsigned int nr_pages)
 	WARN(count != 0, "%d pages are still in use!\n", count);
 }
 
-#ifdef CONFIG_MEMORY_HOTPLUG
 /*
  * The zone indicated has a new number of managed_pages; batch sizes and percpu
  * page high values need to be recalulated.
@@ -8520,7 +8535,6 @@ void __meminit zone_pcp_update(struct zone *zone)
 				per_cpu_ptr(zone->pageset, cpu));
 	mutex_unlock(&pcp_batch_high_lock);
 }
-#endif
 
 void zone_pcp_reset(struct zone *zone)
 {