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    SubjectRe: [PATCH]: Adding a counter in vma to indicate the number of physical pages backing it
    On Fri, 09 Jun 2006 18:33:55 -0700
    Rohit Seth <rohitseth@google.com> wrote:

    > Below is a patch that adds number of physical pages that each vma is
    > using in a process. Exporting this information to user space
    > using /proc/<pid>/maps interface.

    Ouch, that's an awful lot of open-coded incs and decs. Isn't there some
    more centralised place we can do this?

    What locking protects vma.nphys (can we call this nr_present or something?)

    Will this patch do the right thing with weird vmas such as the gate vma and
    mmaps of device memory, etc?

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