This is version 2 of this patch series - nothing major, documented a few things and incorporated various review feedback. Please let me know if there's anything I missed. 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 (14): 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: Rename bio_split() -> bio_pair_split() 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 | 126 ++++++- 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 | 58 +--- drivers/md/linear.c | 6 +- drivers/md/md.c | 44 +-- 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 | 417 ++++++++++++------------ fs/exofs/ore.c | 5 +- include/linux/bio.h | 42 +-- 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, 1433 insertions(+), 527 deletions(-) create mode 100644 include/linux/closure.h create mode 100644 lib/closure.c -- 1.7.9.3.327.g2980b -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
