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    SubjectRe: [PATCH 04/41] VFS: Remove unnecessary micro-optimization in cached_lookup()
    On Sun, Nov 29, 2009 at 09:07:39PM -0500, Erez Zadok wrote:
    > In message <>, Valerie Aurora writes:
    > > From: Jan Blunck <>
    > >
    > > d_lookup() takes rename_lock which is a seq_lock. This is so cheap
    > > it's not worth calling lockless __d_lookup() first from
    > > cache_lookup(). Rename cached_lookup() to cache_lookup() while we're
    > > there.
    > Val, this is another patch unrelated to union mounts, an
    > optimization/simplification of the VFS code. I think you need to try and
    > push such VFS patches upstream more quickly, so as to reduce the set of UM
    > patches you have to maintain.

    I agree. We posted them separately once and will do so again.


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