From: Keith Busch <kbusch@xxxxxxxxxx> The most significant change from v4 is the alignment is now checked prior to building the bio. This gets the expected EINVAL error for misaligned userspace iovecs in all cases now (Eric Biggers). I've removed the legacy fs change, so only iomap filesystems get to use this alignement capability (Christoph Hellwig). The block fops check for alignment returns a bool now (Damien). Adjusted some comments, docs, and other minor style issues. Reviews added for unchanged or trivially changed patches, removed reviews for ones that changed more significantly. As before, I tested using 'fio' with forced misaligned user buffers on raw block, xfs, and ext4 (example raw block profile below). [global] filename=/dev/nvme0n1 ioengine=io_uring verify=crc32c rw=randwrite iodepth=64 direct=1 [small] stonewall bsrange=4k-64k iomem_align=4 [large] stonewall bsrange=512k-4M iomem_align=100 Keith Busch (11): block: fix infinite loop for invalid zone append block/bio: remove duplicate append pages code block: export dma_alignment attribute block: introduce bdev_dma_alignment helper block: add a helper function for dio alignment block/merge: count bytes instead of sectors block/bounce: count bytes instead of sectors iov: introduce iov_iter_aligned block: introduce bdev_iter_is_aligned helper block: relax direct io memory alignment fs: add support for dma aligned direct-io Documentation/ABI/stable/sysfs-block | 9 +++ block/bio.c | 114 ++++++++++++--------------- block/blk-merge.c | 41 ++++++---- block/blk-sysfs.c | 7 ++ block/bounce.c | 13 ++- block/fops.c | 16 ++-- fs/iomap/direct-io.c | 4 +- include/linux/blkdev.h | 12 +++ include/linux/uio.h | 2 + lib/iov_iter.c | 92 +++++++++++++++++++++ 10 files changed, 219 insertions(+), 91 deletions(-) -- 2.30.2
