1 files changed, 25 insertions, 14 deletions

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 44e7ac0fdb66..baa4ab387db7 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -17,6 +17,7 @@
 #include <linux/vmstat.h>
 #include <linux/sched.h>
 #include <linux/math64.h>
+#include <linux/writeback.h>
 
 #ifdef CONFIG_VM_EVENT_COUNTERS
 DEFINE_PER_CPU(struct vm_event_state, vm_event_states) = {{0}};
@@ -747,6 +748,8 @@ static const char * const vmstat_text[] = {
         "nr_shmem",
         "nr_dirtied",
         "nr_written",
+        "nr_dirty_threshold",
+        "nr_dirty_background_threshold",
 
 #ifdef CONFIG_NUMA
         "numa_hit",
@@ -907,36 +910,44 @@ static const struct file_operations proc_zoneinfo_file_operations = {
         .release        = seq_release,
 };
 
+enum writeback_stat_item {
+        NR_DIRTY_THRESHOLD,
+        NR_DIRTY_BG_THRESHOLD,
+        NR_VM_WRITEBACK_STAT_ITEMS,
+};
+
 static void *vmstat_start(struct seq_file *m, loff_t *pos)
 {
         unsigned long *v;
-#ifdef CONFIG_VM_EVENT_COUNTERS
-        unsigned long *e;
-#endif
-        int i;
+        int i, stat_items_size;
 
         if (*pos >= ARRAY_SIZE(vmstat_text))
                 return NULL;
+        stat_items_size = NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long) +
+                          NR_VM_WRITEBACK_STAT_ITEMS * sizeof(unsigned long);
 
 #ifdef CONFIG_VM_EVENT_COUNTERS
-        v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long)
-                        + sizeof(struct vm_event_state), GFP_KERNEL);
-#else
-        v = kmalloc(NR_VM_ZONE_STAT_ITEMS * sizeof(unsigned long),
-                        GFP_KERNEL);
+        stat_items_size += sizeof(struct vm_event_state);
 #endif
+
+        v = kmalloc(stat_items_size, GFP_KERNEL);
         m->private = v;
         if (!v)
                 return ERR_PTR(-ENOMEM);
         for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
                 v[i] = global_page_state(i);
+        v += NR_VM_ZONE_STAT_ITEMS;
+
+        global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD,
+                            v + NR_DIRTY_THRESHOLD);
+        v += NR_VM_WRITEBACK_STAT_ITEMS;
+
 #ifdef CONFIG_VM_EVENT_COUNTERS
-        e = v + NR_VM_ZONE_STAT_ITEMS;
-        all_vm_events(e);
-        e[PGPGIN] /= 2;         /* sectors -> kbytes */
-        e[PGPGOUT] /= 2;
+        all_vm_events(v);
+        v[PGPGIN] /= 2;         /* sectors -> kbytes */
+        v[PGPGOUT] /= 2;
 #endif
-        return v + *pos;
+        return m->private + *pos;
 }
 
 static void *vmstat_next(struct seq_file *m, void *arg, loff_t *pos)