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    SubjectRe: the new VMt
    On Mon, 25 Sep 2000 yodaiken@fsmlabs.com wrote:

    > On Mon, Sep 25, 2000 at 09:23:48PM +0100, Alan Cox wrote:
    > > > my prediction is that if you show me an example of
    > > > DoS vulnerability, I can show you fix that does not require bean counting.
    > > > Am I wrong?
    > >
    > > I think so. Page tables are a good example
    >
    > I'm not too sure of what you have in mind, but if it is
    > "process creates vast virtual space to generate many page table
    > entries -- using mmap"
    > the answer is, virtual address space quotas and mmap should kill
    > the process on low mem for page tables.

    No. Page tables are not freed after munmap (and for good reason). The
    counting of page table "beans" is critical.

    -ben

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