[PATCH v3 0/3] AIO add per-command iopriority

From: adam . manzanares
Date: Tue May 08 2018 - 13:43:42 EST

From: Adam Manzanares <adam.manzanares@xxxxxxx>

This is the per-I/O equivalent of the ioprio_set system call.
See the following link for performance implications on a SATA HDD:

First patch factors ioprio_check_cap function out of ioprio_set system call to
also be used by the aio ioprio interface.

Second patch converts kiocb ki_hint field to a u16 to avoid kiocb bloat.

Third patch passes ioprio hint from aio iocb to kiocb and enables block_dev
usage of the per I/O ioprio feature.

v2: merge patches
validate intended use with IOCB_IOPRIO
add linux-api and linux-block to cc

v3: add ioprio_check_cap function
convert kiocb ki_hint to u16
use ioprio_check_cap when adding ioprio to kiocb in aio.c

Adam Manzanares (3):
block: add ioprio_check_cap function
fs: Convert kiocb rw_hint from enum to u16
fs: Add aio iopriority support for block_dev

block/ioprio.c | 22 ++++++++++++++++------
fs/aio.c | 16 ++++++++++++++++
fs/block_dev.c | 2 ++
include/linux/fs.h | 17 +++++++++++++++--
include/linux/ioprio.h | 2 ++
include/uapi/linux/aio_abi.h | 1 +
6 files changed, 52 insertions(+), 8 deletions(-)