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    SubjectRe: [PATCH] percpu updates
    Brian Gerst wrote:
    >
    > These patches convert some of the existing arrays based on NR_CPUS to
    > use the new per cpu code.
    >
    > ...
    > -extern struct page_state {
    > +struct page_state {
    > unsigned long nr_dirty;
    > unsigned long nr_locked;
    > unsigned long nr_pagecache;
    > -} ____cacheline_aligned_in_smp page_states[NR_CPUS];
    > +};
    > +
    > +extern struct page_state __per_cpu_data page_states;

    When I did this a couple of weeks back it failed in
    mysterious ways and I ended up parking it. Failure
    symptoms included negative numbers being reported in
    /proc/meminfo for "Locked" and "Dirty".

    How well has this been tested? (If the answer
    is "not very" then please wait until I've tested
    it out...)

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