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    SubjectRe: [PATCH 0/9] Prep work for immutable bio vecs
    Hello, Kent.

    On Fri, Sep 07, 2012 at 03:59:11PM -0700, Kent Overstreet wrote:
    > Random assortment of refactoring and trivial cleanups.
    >
    > Immutable bio vecs and efficient bio splitting require auditing and removing
    > pretty much all bi_idx uses, among other things.
    >
    > The reason is that with immutable bio vecs we can't use the bvec array
    > directly; if we have a partially completed bvec, that'll be indicated with a
    > field in struct bvec_iter (which gets embedded in struct bio) - bi_bvec_done.
    >
    > bio_for_each_segments() will handle this transparently, so code needs to be
    > converted to use it or some other generic accessor.
    >
    > Also, bio splitting means that when a driver gets a bio, bi_idx and
    > bi_bvec_done may both be nonzero. Again, just need to use generic accessors.

    There are three pending patchsets and I don't know how they're
    supposed to come together. Please explain on which tree the patches
    are based and how they stack and preferably provide a git branch.

    Thanks.

    --
    tejun


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