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    SubjectRe: Possible Idea with filesystem buffering.
    Rik van Riel wrote:

    >On Mon, 21 Jan 2002, Hans Reiser wrote:
    >
    >>>>and should otherwise check to see if the filesystem supports something
    >>>>like pressure_fs_cache(), yes?
    >>>>
    >>>That's incompatible with the concept of memory zones.
    >>>
    >>Care to explain more?
    >>
    >
    >On basically any machine we'll have multiple memory zones.
    >
    >Each of those memory zones has its own free list and each
    >of the zones can get low on free pages independantly of the
    >other zones.
    >
    >This means that if the VM asks to get a particular page
    >freed, at the very minimum you need to make a page from the
    >same zone freeable.
    >
    >regards,
    >
    >Rik
    >

    I'll discuss with Josh tomorrow how we might implement support for that.
    A clean and simple mechanism does not come to my mind immediately.

    Hans

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