[PATCHSET,v2,0/3] Cleanup and improve MSG_RING performance

Message

Jens Axboe March 29, 2024, 8:09 p.m. UTC

Hi,

MSG_RING rolls its own task_work handling, which there's really no need
for. Rather, it should use the generic io_uring infrastructure for this.

Add a helper for remote execution, and switch over MSG_RING to use it.
This both cleans up the code, and improves performance of this opcode
considerably.

Changes since v1:
- Only pass in ctx, not both ctx and task (Pavel)
- Fix io_req_task_work_add_remote() not using passed in 'ctx' for
  flags check
- Get rid of unneeded references on the io_kiocb

 io_uring/io_uring.c | 30 ++++++++++++++++++++++--------
 io_uring/io_uring.h |  2 ++
 io_uring/msg_ring.c | 34 ++++++++++------------------------
 3 files changed, 34 insertions(+), 32 deletions(-)