[PATCH] Additions to .data.read_mostly section

[linux-2.6] / arch / i386 / mm / discontig.c

diff --git a/arch/i386/mm/discontig.c b/arch/i386/mm/discontig.c
index c369a8bf7cbec4c5bee790c9ef5a06e41ceab2cd..244d8ec66be2a473361bf00d81e81ba53cdf9fe0 100644 (file)
--- a/arch/i386/mm/discontig.c
+++ b/arch/i386/mm/discontig.c
@@ -37,7 +37,7 @@
 #include <asm/mmzone.h>
 #include <bios_ebda.h>
 
-struct pglist_data *node_data[MAX_NUMNODES];
+struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
 EXPORT_SYMBOL(node_data);
 bootmem_data_t node0_bdata;
 
@@ -49,8 +49,8 @@ bootmem_data_t node0_bdata;
  * 2) node_start_pfn   - the starting page frame number for a node
  * 3) node_end_pfn     - the ending page fram number for a node
  */
-unsigned long node_start_pfn[MAX_NUMNODES];
-unsigned long node_end_pfn[MAX_NUMNODES];
+unsigned long node_start_pfn[MAX_NUMNODES] __read_mostly;
+unsigned long node_end_pfn[MAX_NUMNODES] __read_mostly;
 
 
 #ifdef CONFIG_DISCONTIGMEM
@@ -66,7 +66,7 @@ unsigned long node_end_pfn[MAX_NUMNODES];
  *     physnode_map[4-7] = 1;
  *     physnode_map[8- ] = -1;
  */
-s8 physnode_map[MAX_ELEMENTS] = { [0 ... (MAX_ELEMENTS - 1)] = -1};
+s8 physnode_map[MAX_ELEMENTS] __read_mostly = { [0 ... (MAX_ELEMENTS - 1)] = -1};
 EXPORT_SYMBOL(physnode_map);
 
 void memory_present(int nid, unsigned long start, unsigned long end)
@@ -243,14 +243,6 @@ static unsigned long calculate_numa_remap_pages(void)
                /* now the roundup is correct, convert to PAGE_SIZE pages */
                size = size * PTRS_PER_PTE;
 
-               if (node_end_pfn[nid] & (PTRS_PER_PTE-1)) {
-                       /*
-                        * Adjust size if node_end_pfn is not on a proper
-                        * pmd boundary. remap_numa_kva will barf otherwise.
-                        */
-                       size +=  node_end_pfn[nid] & (PTRS_PER_PTE-1);
-               }
-
                /*
                 * Validate the region we are allocating only contains valid
                 * pages.
@@ -270,6 +262,17 @@ static unsigned long calculate_numa_remap_pages(void)
                reserve_pages += size;
                printk("Shrinking node %d from %ld pages to %ld pages\n",
                        nid, node_end_pfn[nid], node_end_pfn[nid] - size);
+
+               if (node_end_pfn[nid] & (PTRS_PER_PTE-1)) {
+                       /*
+                        * Align node_end_pfn[] and node_remap_start_pfn[] to
+                        * pmd boundary. remap_numa_kva will barf otherwise.
+                        */
+                       printk("Shrinking node %d further by %ld pages for proper alignment\n",
+                               nid, node_end_pfn[nid] & (PTRS_PER_PTE-1));
+                       size +=  node_end_pfn[nid] & (PTRS_PER_PTE-1);
+               }
+
                node_end_pfn[nid] -= size;
                node_remap_start_pfn[nid] = node_end_pfn[nid];
        }