9 files changed, 65 insertions, 190 deletions

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 3e8f106ee5fe..2e71e245df90 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -92,9 +92,6 @@ void show_mem(unsigned int filter)
         printk("Mem-info:\n");
         show_free_areas(filter);
 
-        if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
-                return;
-
         for_each_bank (i, mi) {
                 struct membank *bank = &mi->bank[i];
                 unsigned int pfn1, pfn2;
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index da5237d636d6..52715a71aede 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -31,74 +31,6 @@
 static unsigned long max_gap;
 #endif
 
-/**
- * show_mem - give short summary of memory stats
- *
- * 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(unsigned int filter)
-{
-        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(filter);
-        printk(KERN_INFO "Node memory in pages:\n");
-        if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
-                return;
-        for_each_online_pgdat(pgdat) {
-                unsigned long present;
-                unsigned long flags;
-                int shared = 0, cached = 0, reserved = 0;
-                int nid = pgdat->node_id;
-
-                if (skip_free_areas_node(filter, nid))
-                        continue;
-                pgdat_resize_lock(pgdat, &flags);
-                present = pgdat->node_present_pages;
-                for(i = 0; i < pgdat->node_spanned_pages; i++) {
-                        struct page *page;
-                        if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
-                                touch_nmi_watchdog();
-                        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;
-#endif
-                                i = vmemmap_find_next_valid_pfn(nid, i) - 1;
-                                continue;
-                        }
-                        if (PageReserved(page))
-                                reserved++;
-                        else if (PageSwapCache(page))
-                                cached++;
-                        else if (page_count(page))
-                                shared += page_count(page)-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", nid,
-                       present, reserved, shared, cached);
-        }
-        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",
-               quicklist_total_size());
-        printk(KERN_INFO "%ld free buffer pages\n", nr_free_buffer_pages());
-}
-
-
 /* physical address where the bootmem map is located */
 unsigned long bootmap_start;
 
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 2de08f4d9930..878626805369 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -608,69 +608,6 @@ void *per_cpu_init(void)
 #endif /* CONFIG_SMP */
 
 /**
- * show_mem - give short summary of memory stats
- *
- * 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(unsigned int filter)
-{
-        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(filter);
-        if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
-                return;
-        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;
-                int nid = pgdat->node_id;
-
-                if (skip_free_areas_node(filter, nid))
-                        continue;
-                pgdat_resize_lock(pgdat, &flags);
-                present = pgdat->node_present_pages;
-                for(i = 0; i < pgdat->node_spanned_pages; i++) {
-                        struct page *page;
-                        if (unlikely(i % MAX_ORDER_NR_PAGES == 0))
-                                touch_nmi_watchdog();
-                        if (pfn_valid(pgdat->node_start_pfn + i))
-                                page = pfn_to_page(pgdat->node_start_pfn + i);
-                        else {
-                                i = vmemmap_find_next_valid_pfn(nid, i) - 1;
-                                continue;
-                        }
-                        if (PageReserved(page))
-                                reserved++;
-                        else if (PageSwapCache(page))
-                                cached++;
-                        else if (page_count(page))
-                                shared += page_count(page)-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", nid,
-                       present, reserved, shared, cached);
-        }
-        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",
-               quicklist_total_size());
-        printk(KERN_INFO "%ld free buffer pages\n", nr_free_buffer_pages());
-}
-
-/**
  * call_pernode_memory - use SRAT to call callback functions with node info
  * @start: physical start of range
  * @len: length of range
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 88504abf5704..25c350264a41 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -684,3 +684,51 @@ per_linux32_init(void)
 }
 
 __initcall(per_linux32_init);
+
+/**
+ * show_mem - give short summary of memory stats
+ *
+ * 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(unsigned int filter)
+{
+        int total_reserved = 0;
+        unsigned long total_present = 0;
+        pg_data_t *pgdat;
+
+        printk(KERN_INFO "Mem-info:\n");
+        show_free_areas(filter);
+        printk(KERN_INFO "Node memory in pages:\n");
+        for_each_online_pgdat(pgdat) {
+                unsigned long present;
+                unsigned long flags;
+                int reserved = 0;
+                int nid = pgdat->node_id;
+                int zoneid;
+
+                if (skip_free_areas_node(filter, nid))
+                        continue;
+                pgdat_resize_lock(pgdat, &flags);
+
+                for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
+                        struct zone *zone = &pgdat->node_zones[zoneid];
+                        if (!populated_zone(zone))
+                                continue;
+
+                        reserved += zone->present_pages - zone->managed_pages;
+                }
+                present = pgdat->node_present_pages;
+
+                pgdat_resize_unlock(pgdat, &flags);
+                total_present += present;
+                total_reserved += reserved;
+                printk(KERN_INFO "Node %4d:  RAM: %11ld, rsvd: %8d, ",
+                       nid, present, reserved);
+        }
+        printk(KERN_INFO "%ld pages of RAM\n", total_present);
+        printk(KERN_INFO "%d reserved pages\n", total_reserved);
+        printk(KERN_INFO "Total of %ld pages in page table cache\n",
+               quicklist_total_size());
+        printk(KERN_INFO "%ld free buffer pages\n", nr_free_buffer_pages());
+}
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 96f8168cf4ec..ae085ad0fba0 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -645,55 +645,30 @@ EXPORT_SYMBOL(empty_zero_page);
 
 void show_mem(unsigned int filter)
 {
-        int i,free = 0,total = 0,reserved = 0;
-        int shared = 0, cached = 0;
+        int total = 0,reserved = 0;
+        pg_data_t *pgdat;
 
         printk(KERN_INFO "Mem-info:\n");
         show_free_areas(filter);
-        if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
-                return;
-#ifndef CONFIG_DISCONTIGMEM
-        i = max_mapnr;
-        while (i-- > 0) {
-                total++;
-                if (PageReserved(mem_map+i))
-                        reserved++;
-                else if (PageSwapCache(mem_map+i))
-                        cached++;
-                else if (!page_count(&mem_map[i]))
-                        free++;
-                else
-                        shared += page_count(&mem_map[i]) - 1;
-        }
-#else
-        for (i = 0; i < npmem_ranges; i++) {
-                int j;
 
-                for (j = node_start_pfn(i); j < node_end_pfn(i); j++) {
-                        struct page *p;
-                        unsigned long flags;
-
-                        pgdat_resize_lock(NODE_DATA(i), &flags);
-                        p = nid_page_nr(i, j) - node_start_pfn(i);
-
-                        total++;
-                        if (PageReserved(p))
-                                reserved++;
-                        else if (PageSwapCache(p))
-                                cached++;
-                        else if (!page_count(p))
-                                free++;
-                        else
-                                shared += page_count(p) - 1;
-                        pgdat_resize_unlock(NODE_DATA(i), &flags);
-                }
+        for_each_online_pgdat(pgdat) {
+                unsigned long flags;
+                int zoneid;
+
+                pgdat_resize_lock(pgdat, &flags);
+                for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
+                        struct zone *zone = &pgdat->node_zones[zoneid];
+                        if (!populated_zone(zone))
+                                continue;
+
+                        total += zone->present_pages;
+                        reserved = zone->present_pages - zone->managed_pages;
+                }
+                pgdat_resize_unlock(pgdat, &flags);
         }
-#endif
+
         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);
-
 
 #ifdef CONFIG_DISCONTIGMEM
         {
diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c
index ae6bc036db92..be2bde9b07cf 100644
--- a/arch/unicore32/mm/init.c
+++ b/arch/unicore32/mm/init.c
@@ -66,9 +66,6 @@ void show_mem(unsigned int filter)
         printk(KERN_DEFAULT "Mem-info:\n");
         show_free_areas(filter);
 
-        if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
-                return;
-
         for_each_bank(i, mi) {
                 struct membank *bank = &mi->bank[i];
                 unsigned int pfn1, pfn2;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index fc4415256ec3..4c0c01afc19b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1016,7 +1016,6 @@ extern void pagefault_out_of_memory(void);
  * various contexts.
  */
 #define SHOW_MEM_FILTER_NODES           (0x0001u)       /* disallowed nodes */
-#define SHOW_MEM_FILTER_PAGE_COUNT      (0x0002u)       /* page type count */
 
 extern void show_free_areas(unsigned int flags);
 extern bool skip_free_areas_node(unsigned int flags, int nid);
diff --git a/lib/show_mem.c b/lib/show_mem.c
index 5847a4921b8e..f58689f5a24e 100644
--- a/lib/show_mem.c
+++ b/lib/show_mem.c
@@ -17,9 +17,6 @@ void show_mem(unsigned int filter)
         printk("Mem-Info:\n");
         show_free_areas(filter);
 
-        if (filter & SHOW_MEM_FILTER_PAGE_COUNT)
-                return;
-
         for_each_online_pgdat(pgdat) {
                 unsigned long flags;
                 int zoneid;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 89d81f4429ca..ec4417cb458a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2072,13 +2072,6 @@ void warn_alloc_failed(gfp_t gfp_mask, int order, const char *fmt, ...)
                 return;
 
         /*
-         * Walking all memory to count page types is very expensive and should
-         * be inhibited in non-blockable contexts.
-         */
-        if (!(gfp_mask & __GFP_WAIT))
-                filter |= SHOW_MEM_FILTER_PAGE_COUNT;
-
-        /*
          * This documents exceptions given to allocations in certain
          * contexts that are allowed to allocate outside current's set
          * of allowed nodes.