hi all,

i have a question, i looked at my zone information through
/proc/zoneinfor,  i see that one zone has all the zone_stat_item equal 0.
i just do not understand why? and where inside the kernel, it did this
stats for each zone?
here's the output of that zone:
Node 0, zone Non-volatile
  pages free     209598
        min      1097
        low      1371
        high     1645
        scanned  0
        spanned  1310720
        present  1292800
    nr_free_pages 209598
    nr_inactive_anon 0
    nr_active_anon 0
    nr_inactive_file 0
    nr_active_file 0
    nr_unevictable 0
    nr_mlock     0
    nr_anon_pages 0
    nr_mapped    0
    nr_file_pages 0
    nr_dirty     0
    nr_writeback 0
    nr_slab_reclaimable 0
    nr_slab_unreclaimable 0
    nr_page_table_pages 0
    nr_kernel_stack 0
    nr_unstable  0
    nr_bounce    0
    nr_vmscan_write 0
    nr_writeback_temp 0
    nr_isolated_anon 0
    nr_isolated_file 0
    nr_shmem     0
        protection: (0, 0, 0, 0, 0)
  pagesets
    cpu: 0
              count: 64
              high:  186
              batch: 31
  vm stats threshold: 42
    cpu: 1
              count: 23
              high:  186
              batch: 31
  vm stats threshold: 42
    cpu: 2
              count: 0
              high:  186
              batch: 31
  vm stats threshold: 42
    cpu: 3
              count: 30
              high:  186
              batch: 31
  vm stats threshold: 42
  all_unreclaimable: 0
  prev_priority:     12
  start_pfn:         1048576
  inactive_ratio:    6

Thanks,
Sheng

-- 
Sheng Qiu
Texas A & M University
Room 302 Wisenbaker
email: herbert1984106@gmail.com
College Station, TX 77843-3259