From: Keith Busch <kbusch@xxxxxxxxxx>
Handling passthrough metadata ("integrity") today introduces overhead
and complications that we can avoid if we just map user space addresses
directly. This patch series implements that, falling back to a kernel
bounce buffer if necessary.
v2->v3:
Introduces a multi-page bvec iterator.
Fix leaking pinned user pages (Kanchan)
Fix final unpaired 'put' on user pages (Kanchan)
Doesn't increase the size of 'struct bio_integrity_profile'; if the
'copy_vec' pointer is needed, it gets appended to the existing bvec.
Fix compiler warnings
Fix compiler error for !CONFIG_BLK_INTEGRITY
Keith Busch (5):
bvec: introduce multi-page bvec iterating
block: bio-integrity: directly map user buffers
nvme: use bio_integrity_map_user
iouring: remove IORING_URING_CMD_POLLED
io_uring: remove uring_cmd cookie
block/bio-integrity.c | 212 ++++++++++++++++++++++++++++++++++++++
drivers/nvme/host/ioctl.c | 197 ++++++-----------------------------
include/linux/bio.h | 12 +++
include/linux/bvec.h | 6 ++
include/linux/io_uring.h | 9 +-
io_uring/uring_cmd.c | 1 -
6 files changed, 261 insertions(+), 176 deletions(-)
--
2.34.1
