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    SubjectRe: mm question


    On Mon, 10 Dec 2001, Rik van Riel wrote:

    > On Mon, 10 Dec 2001 volodya@mindspring.com wrote:
    > > On Mon, 10 Dec 2001, Alan Cox wrote:
    > >
    > > > > I don't want to move them - I just want to collect all that are free and
    > > > > then try to free some more.
    > > >
    > > > How will you free them, you don't know who owns them.
    > >
    > > I think you misunderstood me - this allocation happens in response to
    > > the system call _not_ in an interrupt handler. So it is ok to wait -
    > > as long as needed. I was thinking of calling page swapper or something
    > > and perhaps going after I/O buffers first.
    >
    > Even if you have a handle on a physical page, you don't know
    > what processes are using the page, nor if there are additional
    > users besides the processes.
    >
    > This makes it rather hard to go around trying to free pages
    > within a certain physical range.

    Well, what does kernel do when it runs out of memory ? For example when I
    mmap a large file and start reading it back and force ?

    Vladimir Dergachev

    >
    > cheers,
    >
    > Rik
    > --
    > DMCA, SSSCA, W3C? Who cares? http://thefreeworld.net/
    >
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    >

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