Messages in this thread | | | Date | Sat, 8 Sep 2012 12:41:15 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH 0/9] Prep work for immutable bio vecs |
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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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