4 files changed, 55 insertions, 5 deletions

diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index 6ded3a50dfe6..b548dea4e5b9 100644
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -185,6 +185,40 @@ unsigned long __init e820_end_of_ram(void)
 }
 
 /* 
+ * Compute how much memory is missing in a range.
+ * Unlike the other functions in this file the arguments are in page numbers.
+ */
+unsigned long __init
+e820_hole_size(unsigned long start_pfn, unsigned long end_pfn)
+{
+        unsigned long ram = 0;
+        unsigned long start = start_pfn << PAGE_SHIFT;
+        unsigned long end = end_pfn << PAGE_SHIFT;
+        int i;
+        for (i = 0; i < e820.nr_map; i++) {
+                struct e820entry *ei = &e820.map[i];
+                unsigned long last, addr;
+
+                if (ei->type != E820_RAM ||
+                    ei->addr+ei->size <= start ||
+                    ei->addr >= end)
+                        continue;
+
+                addr = round_up(ei->addr, PAGE_SIZE);
+                if (addr < start)
+                        addr = start;
+
+                last = round_down(ei->addr + ei->size, PAGE_SIZE);
+                if (last >= end)
+                        last = end;
+
+                if (last > addr)
+                        ram += last - addr;
+        }
+        return ((end - start) - ram) >> PAGE_SHIFT;
+}
+
+/*
  * Mark e820 reserved areas as busy for the resource manager.
  */
 void __init e820_reserve_resources(void)
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 72e4b364ed73..aa4a5189ecee 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -322,18 +322,26 @@ void zap_low_mappings(void)
 void __init paging_init(void)
 {
         {
-                unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
+                unsigned long zones_size[MAX_NR_ZONES];
+                unsigned long holes[MAX_NR_ZONES];
                 unsigned int max_dma;
 
+                memset(zones_size, 0, sizeof(zones_size));
+                memset(holes, 0, sizeof(holes));
+
                 max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
 
-                if (end_pfn < max_dma)
+                if (end_pfn < max_dma) {
                         zones_size[ZONE_DMA] = end_pfn;
-                else {
+                        holes[ZONE_DMA] = e820_hole_size(0, end_pfn);
+                } else {
                         zones_size[ZONE_DMA] = max_dma;
+                        holes[ZONE_DMA] = e820_hole_size(0, max_dma);
                         zones_size[ZONE_NORMAL] = end_pfn - max_dma;
+                        holes[ZONE_NORMAL] = e820_hole_size(max_dma, end_pfn);
                 }
-                free_area_init(zones_size);
+                free_area_init_node(0, NODE_DATA(0), zones_size,
+                        __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
         }
         return;
 }
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
index 70cb2904a90f..6a156f5692ae 100644
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -126,9 +126,11 @@ void __init setup_node_zones(int nodeid)
 { 
         unsigned long start_pfn, end_pfn; 
         unsigned long zones[MAX_NR_ZONES];
+        unsigned long holes[MAX_NR_ZONES];
         unsigned long dma_end_pfn;
 
         memset(zones, 0, sizeof(unsigned long) * MAX_NR_ZONES); 
+        memset(holes, 0, sizeof(unsigned long) * MAX_NR_ZONES);
 
         start_pfn = node_start_pfn(nodeid);
         end_pfn = node_end_pfn(nodeid);
@@ -139,13 +141,17 @@ void __init setup_node_zones(int nodeid)
         dma_end_pfn = __pa(MAX_DMA_ADDRESS) >> PAGE_SHIFT; 
         if (start_pfn < dma_end_pfn) { 
                 zones[ZONE_DMA] = dma_end_pfn - start_pfn;
+                holes[ZONE_DMA] = e820_hole_size(start_pfn, dma_end_pfn);
                 zones[ZONE_NORMAL] = end_pfn - dma_end_pfn; 
+                holes[ZONE_NORMAL] = e820_hole_size(dma_end_pfn, end_pfn);
+
         } else { 
                 zones[ZONE_NORMAL] = end_pfn - start_pfn; 
+                holes[ZONE_NORMAL] = e820_hole_size(start_pfn, end_pfn);
         } 
     
         free_area_init_node(nodeid, NODE_DATA(nodeid), zones,
-                            start_pfn, NULL); 
+                            start_pfn, holes);
 } 
 
 void __init numa_init_array(void)
diff --git a/include/asm-x86_64/e820.h b/include/asm-x86_64/e820.h
index 8e94edf0b984..e682edc24a68 100644
--- a/include/asm-x86_64/e820.h
+++ b/include/asm-x86_64/e820.h
@@ -51,6 +51,8 @@ extern int e820_mapped(unsigned long start, unsigned long end, unsigned type);
 
 extern void e820_bootmem_free(pg_data_t *pgdat, unsigned long start,unsigned long end);
 extern void e820_setup_gap(void);
+extern unsigned long e820_hole_size(unsigned long start_pfn,
+                                    unsigned long end_pfn);
 
 extern void __init parse_memopt(char *p, char **end);