X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=mm%2Fpage_alloc.c;h=23b84c4e1a57beaf3a3b2cd578318b3da592071c;hb=664beed0190fae687ac51295694004902ddeb18e;hp=3c5cf664abd2eca14d2613a57023dcfcac6b6fde;hpb=70ac551651a2c5a234b703d9a495817f2ca09639;p=linux-2.6

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3c5cf664ab..23b84c4e1a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -60,8 +60,11 @@ long nr_swap_pages;
  *	NORMAL allocation will leave 784M/256 of ram reserved in the ZONE_DMA
  *	HIGHMEM allocation will leave 224M/32 of ram reserved in ZONE_NORMAL
  *	HIGHMEM allocation will (224M+784M)/256 of ram reserved in ZONE_DMA
+ *
+ * TBD: should special case ZONE_DMA32 machines here - in those we normally
+ * don't need any ZONE_NORMAL reservation
  */
-int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { 256, 32 };
+int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { 256, 256, 32 };
 
 EXPORT_SYMBOL(totalram_pages);
 
@@ -72,7 +75,7 @@ EXPORT_SYMBOL(totalram_pages);
 struct zone *zone_table[1 << ZONETABLE_SHIFT] __read_mostly;
 EXPORT_SYMBOL(zone_table);
 
-static char *zone_names[MAX_NR_ZONES] = { "DMA", "Normal", "HighMem" };
+static char *zone_names[MAX_NR_ZONES] = { "DMA", "DMA32", "Normal", "HighMem" };
 int min_free_kbytes = 1024;
 
 unsigned long __initdata nr_kernel_pages;
@@ -124,7 +127,7 @@ static void bad_page(const char *function, struct page *page)
 	printk(KERN_EMERG "Bad page state at %s (in process '%s', page %p)\n",
 		function, current->comm, page);
 	printk(KERN_EMERG "flags:0x%0*lx mapping:%p mapcount:%d count:%d\n",
-		(int)(2*sizeof(page_flags_t)), (unsigned long)page->flags,
+		(int)(2*sizeof(unsigned long)), (unsigned long)page->flags,
 		page->mapping, page_mapcount(page), page_count(page));
 	printk(KERN_EMERG "Backtrace:\n");
 	dump_stack();
@@ -145,10 +148,6 @@ static void bad_page(const char *function, struct page *page)
 	add_taint(TAINT_BAD_PAGE);
 }
 
-#ifndef CONFIG_HUGETLB_PAGE
-#define prep_compound_page(page, order) do { } while (0)
-#define destroy_compound_page(page, order) do { } while (0)
-#else
 /*
  * Higher-order pages are called "compound pages".  They are structured thusly:
  *
@@ -202,7 +201,6 @@ static void destroy_compound_page(struct page *page, unsigned long order)
 		ClearPageCompound(p);
 	}
 }
-#endif		/* CONFIG_HUGETLB_PAGE */
 
 /*
  * function for dealing with page's order in buddy system.
@@ -842,21 +840,22 @@ __alloc_pages(gfp_t gfp_mask, unsigned int order,
 
 	might_sleep_if(wait);
 
+restart:
 	z = zonelist->zones;  /* the list of zones suitable for gfp_mask */
 
 	if (unlikely(*z == NULL)) {
 		/* Should this ever happen?? */
 		return NULL;
 	}
-restart:
+
 	page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, order,
 				zonelist, ALLOC_CPUSET);
 	if (page)
 		goto got_pg;
 
-	do
+	do {
 		wakeup_kswapd(*z, order);
-	while (*(++z));
+	} while (*(++z));
 
 	/*
 	 * OK, we're below the kswapd watermark and have kicked background
@@ -1421,6 +1420,10 @@ static int __init build_zonelists_node(pg_data_t *pgdat, struct zonelist *zoneli
 		zone = pgdat->node_zones + ZONE_NORMAL;
 		if (zone->present_pages)
 			zonelist->zones[j++] = zone;
+	case ZONE_DMA32:
+		zone = pgdat->node_zones + ZONE_DMA32;
+		if (zone->present_pages)
+			zonelist->zones[j++] = zone;
 	case ZONE_DMA:
 		zone = pgdat->node_zones + ZONE_DMA;
 		if (zone->present_pages)
@@ -1435,6 +1438,8 @@ static inline int highest_zone(int zone_bits)
 	int res = ZONE_NORMAL;
 	if (zone_bits & (__force int)__GFP_HIGHMEM)
 		res = ZONE_HIGHMEM;
+	if (zone_bits & (__force int)__GFP_DMA32)
+		res = ZONE_DMA32;
 	if (zone_bits & (__force int)__GFP_DMA)
 		res = ZONE_DMA;
 	return res;
@@ -1846,11 +1851,10 @@ static int __devinit pageset_cpuup_callback(struct notifier_block *nfb,
 			if (process_zones(cpu))
 				ret = NOTIFY_BAD;
 			break;
-#ifdef CONFIG_HOTPLUG_CPU
+		case CPU_UP_CANCELED:
 		case CPU_DEAD:
 			free_zone_pagesets(cpu);
 			break;
-#endif
 		default:
 			break;
 	}
@@ -1955,7 +1959,7 @@ static void __init free_area_init_core(struct pglist_data *pgdat,
 		if (zholes_size)
 			realsize -= zholes_size[j];
 
-		if (j == ZONE_DMA || j == ZONE_NORMAL)
+		if (j < ZONE_HIGHMEM)
 			nr_kernel_pages += realsize;
 		nr_all_pages += realsize;