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    SubjectBetter pagecache statistics ?
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    Hi,

    Is there a effort/patches underway to provide better pagecache
    statistics ?

    Basically, I am interested in finding detailed break out of
    cached pages. ("Cached" in /proc/meminfo)

    Out of this "cached pages"

    - How much is just file system cache (regular file data) ?
    - How much is shared memory pages ?
    - How much is mmaped() stuff ?
    - How much is for text, data, bss, heap, malloc ?

    What is the right way of getting this kind of data ?
    I was trying to add tags when we do add_to_page_cache()
    and quickly got ugly :(

    Thanks,
    Badari

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