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    SubjectRe: [PATCH 5/5] add NR_ANON_PAGES to OOM log
    On Thu, Jul 9, 2009 at 4:20 PM, KOSAKI
    Motohiro<> wrote:
    >> > On Mon, 6 Jul 2009, Minchan Kim wrote:
    >> >
    >> > > Anyway, I think it's not a big cost in normal system.
    >> > > So If you want to add new accounting, I don't have any objection. :)
    >> >
    >> > Lets keep the counters to a mininum. If we can calculate the values from
    >> > something else then there is no justification for a new counter.
    >> >
    >> > A new counter increases the size of the per cpu structures that exist for
    >> > each zone and each cpu. 1 byte gets multiplies by the number of cpus and
    >> > that gets multiplied by the number of zones.
    >> OK. I'll implement this idea.
    > Grr, sorry I cancel this opinion. Shem pages can't be calculated
    > by minchan's formula.
    > if those page are mlocked, the page move to unevictable lru. then
    > this calculation don't account mlocked page. However mlocked tmpfs pages
    > also make OOM issue.

    Absolutely. You're right.
    But In my opinion, mlocked shmem pages are important ?
    Now we care only number of unevictable pages but don't care what kinds
    of pages there are in unevictable list.

    What we need is to decode OOM more easily.
    I think what kinds of pages there area unevictable lur list is not important.

    Kind regards,
    Minchan Kim

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