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    SubjectRe: What to expect with the 2.6 VM
    On Wed, 2 Jul 2003, Martin J. Bligh wrote:

    > Maybe I'm just taking this out of context, and it's twisting my brain,
    > but as far as I know, the nonlinear vma's *are* backed by pte_chains.

    They are, but IMHO they shouldn't be. The nonlinear vmas are used
    only for database shared memory segments and other "bypass the VM"
    applications, so I don't see any reason why we need to complicate
    things hopelessly in order to deal with corner cases like truncate.

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