[PATCH] Have x86_64 use add_active_range() and free_area_init_nodes

Size zones and holes in an architecture independent manner for x86_64.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Andi Kleen <ak@muc.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "Keith Mannthey" <kmannth@gmail.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index ca10701e7a90..7b50bb1caabe 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -93,6 +93,7 @@ static __init void bad_srat(void)
                 apicid_to_node[i] = NUMA_NO_NODE;
         for (i = 0; i < MAX_NUMNODES; i++)
                 nodes_add[i].start = nodes[i].end = 0;
+        remove_all_active_ranges();
 }
 
 static __init inline int srat_disabled(void)
@@ -175,7 +176,7 @@ static int hotadd_enough_memory(struct bootnode *nd)
 
         if (mem < 0)
                 return 0;
-        allowed = (end_pfn - e820_hole_size(0, end_pfn)) * PAGE_SIZE;
+        allowed = (end_pfn - absent_pages_in_range(0, end_pfn)) * PAGE_SIZE;
         allowed = (allowed / 100) * hotadd_percent;
         if (allocated + mem > allowed) {
                 unsigned long range;
@@ -225,7 +226,7 @@ static int reserve_hotadd(int node, unsigned long start, unsigned long end)
         }
 
         /* This check might be a bit too strict, but I'm keeping it for now. */
-        if (e820_hole_size(s_pfn, e_pfn) != e_pfn - s_pfn) {
+        if (absent_pages_in_range(s_pfn, e_pfn) != e_pfn - s_pfn) {
                 printk(KERN_ERR "SRAT: Hotplug area has existing memory\n");
                 return -1;
         }
@@ -319,6 +320,8 @@ acpi_numa_memory_affinity_init(struct acpi_table_memory_affinity *ma)
 
         printk(KERN_INFO "SRAT: Node %u PXM %u %Lx-%Lx\n", node, pxm,
                nd->start, nd->end);
+        e820_register_active_regions(node, nd->start >> PAGE_SHIFT,
+                                                nd->end >> PAGE_SHIFT);
 
 #ifdef RESERVE_HOTADD
         if (ma->flags.hot_pluggable && reserve_hotadd(node, start, end) < 0) {
@@ -343,13 +346,13 @@ static int nodes_cover_memory(void)
                 unsigned long s = nodes[i].start >> PAGE_SHIFT;
                 unsigned long e = nodes[i].end >> PAGE_SHIFT;
                 pxmram += e - s;
-                pxmram -= e820_hole_size(s, e);
+                pxmram -= absent_pages_in_range(s, e);
                 pxmram -= nodes_add[i].end - nodes_add[i].start;
                 if ((long)pxmram < 0)
                         pxmram = 0;
         }
 
-        e820ram = end_pfn - e820_hole_size(0, end_pfn);
+        e820ram = end_pfn - absent_pages_in_range(0, end_pfn);
         /* We seem to lose 3 pages somewhere. Allow a bit of slack. */
         if ((long)(e820ram - pxmram) >= 1*1024*1024) {
                 printk(KERN_ERR