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    Subject[PATCH 00/13] Block cleanups (for bcache)
    Date
    From: Kent Overstreet <koverstreet@google.com>

    Couple related things in this patch series. This is mostly stuff I did for
    bcache, polished/expanded up a bit:

    * Bio pool freeing. This moves freeing of bios allocated from bio pools into
    generic code.

    * Kill bi_destructor. That was Tejun's idea, but it turned out to be easier
    than I expected.

    * Improved bio splitting. This was originally part of bcache, but I pulled it
    out and replaced the existing bio splitting code with it.

    * Closures - this is from bcache. I didn't really need to use it for the next
    patch, but IMO it makes the code a bit more elegant.

    * Make generic_make_request() handle arbitrary size bios. I think this is
    going to enable a lot of cleanups in the future.

    The idea here isn't for generic_make_request() to be doing the splitting in
    practice long term, it's more just an intermediate stage. If this goes in, I
    think a lot of driver code - certainly a lot of virtual block drivers -
    could easily be made to handle arbitrary sized bios, and splitting will only
    happen when a bio is being redirected to two different devices or something
    like that. But this should enable a lot of cleanups without having to change
    every block driver first.

    Kent Overstreet (13):
    block: Generalized bio pool freeing
    dm: kill dm_rq_bio_destructor
    block: Add bio_clone_bioset()
    block: Add bio_clone_kmalloc()
    block: Only clone bio vecs that are in use
    block: Add bio_reset()
    pktcdvd: Switch to bio_kmalloc()
    block: Kill bi_destructor
    block: Add an explicit bio flag for bios that own their bvec
    block: Rework bio splitting
    Closures
    Make generic_make_request handle arbitrarily large bios
    Gut bio_add_page()

    Documentation/block/biodoc.txt | 5 -
    block/blk-core.c | 119 +++++++-
    drivers/block/drbd/drbd_req.c | 18 +-
    drivers/block/osdblk.c | 3 +-
    drivers/block/pktcdvd.c | 121 +++-----
    drivers/block/rbd.c | 12 +-
    drivers/md/dm-crypt.c | 9 -
    drivers/md/dm-io.c | 11 -
    drivers/md/dm.c | 48 +--
    drivers/md/linear.c | 6 +-
    drivers/md/md.c | 42 +---
    drivers/md/raid0.c | 8 +-
    drivers/md/raid10.c | 23 +-
    drivers/target/target_core_iblock.c | 9 -
    fs/bio-integrity.c | 44 ---
    fs/bio.c | 407 ++++++++++++-----------
    fs/exofs/ore.c | 5 +-
    include/linux/bio.h | 37 ++-
    include/linux/blk_types.h | 9 +-
    include/linux/blkdev.h | 3 +
    include/linux/closure.h | 614 +++++++++++++++++++++++++++++++++++
    lib/Kconfig.debug | 8 +
    lib/Makefile | 2 +-
    lib/closure.c | 363 +++++++++++++++++++++
    24 files changed, 1419 insertions(+), 507 deletions(-)
    create mode 100644 include/linux/closure.h
    create mode 100644 lib/closure.c

    --
    1.7.9.rc2



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