Strange VM stats in /proc/zoneinfo

[Petr Tesarik <ptesarik@suse.cz>]

Hi folks,

while looking at my /proc/zoneinfo, I noticed that the counters are a bit 
strange:

Node 0, zone      DMA
  pages free     3945
        min      7
        low      8
        high     10
        scanned  0
        spanned  4080
        present  3905
    nr_free_pages 3945

OK, you'll probably argue that the rest is hidden in PCP differentials... BUT:

1. this machine has only 2 CPUs
2. stat_threshold = 4
3. vm_stat_diff[NR_FREE_PAGES] = 0 on both CPUs

Is this only me? Or do I misrepresent what these number actually tell?

TIA,
Petr Tesarik

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