On Sat, Sep 08, 2012 at 12:41:15PM -0700, Tejun Heo wrote:
Hello, Kent.
On Fri, Sep 07, 2012 at 03:59:11PM -0700, Kent Overstreet wrote:
quoted
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.
Both of the new ones depend on the block cleanups series, but they
shouldn't depend on each other (bar perhaps some trivial merge
conflicts in bio.h)
Git repo - block_stuff branch on http://evilpiepirate.org/git/linux-bcache.git/