Re: [PATCH] VM fix for 2.4.0-test9 & OOM handler

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Mon Oct 09 2000 - 17:51:34 EDT

  • Next message: Rik van Riel: "Re: [PATCH] VM fix for 2.4.0-test9 & OOM handler"

    > > across AF_UNIX sockets so the mechanism is notionally there to provide the
    > > credentials to X, just not to use them
    >
    > The problem is that there is no way to keep track of them afterwards.

    If you use mmap for your allocator then beancounter will get it right. Every
    resource knows which beancounter it was charged too. It adds an overhead the
    average desktop user won't like but which is pretty much essential to do real
    mainframe world operation. So it would become

            seteuid(Client->passed_euid);
            mmap(buffer in pages)
            seteuid(getuid());

    With lightwait counting semantics its hard to make any tracking system work
    well in the corner cases like resources that survive process death.

    Alan

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