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    SubjectRe: Eureka! (was Re: UTF-8 and case-insensitivity)
    On Thu, Feb 19, 2004 at 11:48:50AM -0800, Linus Torvalds wrote:
    > The VFS rule is:
    > - all new dentries start off with the two magic bits clear
    > - whenever we shrink a dentry, we clear the two magic bits in the parent
    > and that is _all_ the VFS layer ever does. Even Al won't find this
    > obnoxious (yeah, we might clear the bits after a timeout on things that
    > need re-validation, but that's in the noise).

    > Notice what the above does? After the above loop, bit two will be set IFF
    > the dentry cache now contains every single name in the directory.
    > Otherwise it will be clear. Bit two will basically be a "dcache complete"
    > bit.

    What about dentry getting dropped in the middle of that loop _and_
    another task setting the first bit again before the loop ends?
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