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Re: [dm-devel] [PATCH v2 00/26] Prep work for immutable bio vecs

On Mon, Sep 10, 2012 at 05:22:11PM -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.
> v2: Patch series now has all the prep work to be done before abstracting
> out the bio iterator, I think.

Cc'ing Vivek.  Kent, can you please add Vivek to Cc on block layer

Vivek, can you please review this series?  It's generic block stuff
and definitely can use your review.




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