Hi, Interests[1] have been shown in multipage bvecs, so this patchset try to prepare for the support and do two things: 1) the 1st 4 patches use bvec iterator to implement iterate_bvec(), then we can drop the non-standard way for iterating bvec, which can be thought as a good cleanup for lib/iov_iter.c 2) remove BIO_MAX_SECTORS & BIO_MAX_SIZE, and now there is only one user for each. Once multipage bvecs is introduced, one bio may hold lots of sectors, and we should always use sort of BIO_MAX_VECS which should be introduced in future and is similiar with current BIO_MAX_PAGES. The only functional change is iterate_bvec():lib/iov_iter.c xfstests(-a auto) over loop aio is run for ext4/xfs to verify the change and no regression found with this patchset. Jens, I am confidant this time, so please give it a go if no one objects. I appreciate someone(AI? or anyone) can give a review on the patch 4/8 about iterate_bvec() change. V5: - use bvec's iterator to figure new base vec address and update 'skip' correctly - run xfstests(-a auto) on loop aio/dio for verifying the change in iterate_bvec(), and no regression reported - use stree-ng to trigger heavy swap over swapfile to verify change in iterate_bvec() too, looks everything is fine V4: - make xfstests cover xfs - rebase on for-next of block tree V3: - include kenrel.h & bug.h in bvec.h for fix comiling failure on arm as reported by 0day ktest - build test on arm & arm64 V2: - rename bvec_iter.h as bvec.h - always include bvec.h into blk_types.h as suggested by Christoph V1: - don't move BIO_MAX_* to bvec_iter.h as pointed out by Christoph - run xfstests against v4.6-rc1-next-20160329 - add Reviewed-by - for 1,4 and 5, Reviewd-by not added, Christoph still expressed 'this looks fine to me.' Ming Lei (8): block: move bvec iterator into include/linux/bvec.h block: move two bvec structure into bvec.h block: mark 1st parameter of bvec_iter_advance as const iov_iter: use bvec iterator to implement iterate_bvec() fs: xfs: replace BIO_MAX_SECTORS with BIO_MAX_PAGES block: bio: remove BIO_MAX_SECTORS block: drbd: avoid to use BIO_MAX_SIZE block: bio: remove BIO_MAX_SIZE drivers/block/drbd/drbd_int.h | 4 +- fs/xfs/xfs_buf.c | 4 +- include/linux/bio.h | 52 ----------------------- include/linux/blk_types.h | 22 +--------- include/linux/bvec.h | 96 +++++++++++++++++++++++++++++++++++++++++++ lib/iov_iter.c | 45 +++++++------------- 6 files changed, 115 insertions(+), 108 deletions(-) create mode 100644 include/linux/bvec.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
