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    SubjectRe: negative dentries wasting ram


    On Fri, 24 May 2002, Andrea Arcangeli wrote:

    > > Note that this will have to touch the FS anyway, since the O_CREAT thing
    > > forces a call down to the FS to actually create the file.
    >
    > yep. the only case where it could provide some in-core "caching"
    > positive effect is:
    >
    > unlink
    > open(w/o creat)
    >
    > but I don't see it as a common case.

    Guys, how about tracing the damn thing and checking what actually
    happens? Or, at least, checking the prototypes and noticing that ->create()
    takes (hashed) dentry as an argument, so if unlinked on had been freed we _must_
    call ->lookup().


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