[IA64] show_mem() for IA64 sparsemem NUMA

On the ia64 architecture only this patch upgrades show_mem() for sparse
memory to be the same as it was for discontig memory.  It has been shown to
work on NUMA and flatmem architectures.

Signed-off-by: George Beshers <gbeshers@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index ec8657b..63e6d49 100644 (file)
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -30,47 +30,69 @@ static unsigned long max_gap;
 #endif
 
 /**
- * show_mem - display a memory statistics summary
+ * show_mem - give short summary of memory stats
  *
- * Just walks the pages in the system and describes where they're allocated.
+ * Shows a simple page count of reserved and used pages in the system.
+ * For discontig machines, it does this on a per-pgdat basis.
  */
-void
-show_mem (void)
+void show_mem(void)
 {
-       int i, total = 0, reserved = 0;
-       int shared = 0, cached = 0;
+       int i, total_reserved = 0;
+       int total_shared = 0, total_cached = 0;
+       unsigned long total_present = 0;
+       pg_data_t *pgdat;
 
        printk(KERN_INFO "Mem-info:\n");
        show_free_areas();
-
        printk(KERN_INFO "Free swap:       %6ldkB\n",
               nr_swap_pages<<(PAGE_SHIFT-10));
-       i = max_mapnr;
-       for (i = 0; i < max_mapnr; i++) {
-               if (!pfn_valid(i)) {
+       printk(KERN_INFO "Node memory in pages:\n");
+       for_each_online_pgdat(pgdat) {
+               unsigned long present;
+               unsigned long flags;
+               int shared = 0, cached = 0, reserved = 0;
+
+               pgdat_resize_lock(pgdat, &flags);
+               present = pgdat->node_present_pages;
+               for(i = 0; i < pgdat->node_spanned_pages; i++) {
+                       struct page *page;
+                       if (pfn_valid(pgdat->node_start_pfn + i))
+                               page = pfn_to_page(pgdat->node_start_pfn + i);
+                       else {
 #ifdef CONFIG_VIRTUAL_MEM_MAP
-                       if (max_gap < LARGE_GAP)
-                               continue;
-                       i = vmemmap_find_next_valid_pfn(0, i) - 1;
+                               if (max_gap < LARGE_GAP)
+                                       continue;
 #endif
-                       continue;
+                               i = vmemmap_find_next_valid_pfn(pgdat->node_id,
+                                        i) - 1;
+                               continue;
+                       }
+                       if (PageReserved(page))
+                               reserved++;
+                       else if (PageSwapCache(page))
+                               cached++;
+                       else if (page_count(page))
+                               shared += page_count(page)-1;
                }
-               total++;
-               if (PageReserved(mem_map+i))
-                       reserved++;
-               else if (PageSwapCache(mem_map+i))
-                       cached++;
-               else if (page_count(mem_map + i))
-                       shared += page_count(mem_map + i) - 1;
+               pgdat_resize_unlock(pgdat, &flags);
+               total_present += present;
+               total_reserved += reserved;
+               total_cached += cached;
+               total_shared += shared;
+               printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, "
+                      "shrd: %10d, swpd: %10d\n", pgdat->node_id,
+                      present, reserved, shared, cached);
        }
-       printk(KERN_INFO "%d pages of RAM\n", total);
-       printk(KERN_INFO "%d reserved pages\n", reserved);
-       printk(KERN_INFO "%d pages shared\n", shared);
-       printk(KERN_INFO "%d pages swap cached\n", cached);
-       printk(KERN_INFO "%ld pages in page table cache\n",
+       printk(KERN_INFO "%ld pages of RAM\n", total_present);
+       printk(KERN_INFO "%d reserved pages\n", total_reserved);
+       printk(KERN_INFO "%d pages shared\n", total_shared);
+       printk(KERN_INFO "%d pages swap cached\n", total_cached);
+       printk(KERN_INFO "Total of %ld pages in page table cache\n",
               pgtable_quicklist_total_size());
+       printk(KERN_INFO "%d free buffer pages\n", nr_free_buffer_pages());
 }
 
+
 /* physical address where the bootmem map is located */
 unsigned long bootmap_start;