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    SubjectRe: [PATCH 1/9] exec_path 1/9: introduce ->exec_path and switch /proc/*/exe
    On Thu, Jun 04, 2009 at 08:07:23AM -0700, Linus Torvalds wrote:
    >
    >
    > On Thu, 4 Jun 2009, Matt Helsley wrote:
    > >
    > > Doesn't this pin the vfs mount of the executable for the lifetime of
    > > the task?
    >
    > Well, yes, but so does the current code.

    Not quite. The current code pins it as long as the corresponding VMAs
    are mapped -- not for the lifetime of the task.

    > Sure, in _theory_ it can be a non-mmap executable (maybe people still have
    > those old OMAGIC a.out executables), and in _theory_ you could unmap the
    > executable even if it was originally mmap'ed, but neither of those is
    > exactly common, are they?

    Not common to my knowledge, no.

    >
    > So in practice, nothing has changed wrt lifetime of the executable.

    Almost all of the time, yes.

    Cheers,
    -Matt Helsley


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