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nvme: optimise io_uring passthrough completion

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Use IOU_F_TWQ_LAZY_WAKE via iou_cmd_exec_in_task_lazy() for passthrough
commands completion. It further delays the execution of task_work for
DEFER_TASKRUN until there are enough of task_work items queued to meet
the waiting criteria, which reduces the number of wake ups we issue.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/ecdfacd0967a22d88b7779e2efd09e040825d0f8.1684154817.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2023-05-15 13:54:43 +01:00 committed by Jens Axboe
parent 5f3139fc46
commit f026be0e1e
1 changed files with 2 additions and 2 deletions
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4
drivers/nvme/host/ioctl.c
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@ -521,7 +521,7 @@ static enum rq_end_io_ret nvme_uring_cmd_end_io(struct request *req,
if (cookie != NULL && blk_rq_is_poll(req)) if (cookie != NULL && blk_rq_is_poll(req))
nvme_uring_task_cb(ioucmd, IO_URING_F_UNLOCKED); nvme_uring_task_cb(ioucmd, IO_URING_F_UNLOCKED);
else else
io_uring_cmd_complete_in_task(ioucmd, nvme_uring_task_cb); io_uring_cmd_do_in_task_lazy(ioucmd, nvme_uring_task_cb);
return RQ_END_IO_FREE; return RQ_END_IO_FREE;
} }
@ -543,7 +543,7 @@ static enum rq_end_io_ret nvme_uring_cmd_end_io_meta(struct request *req,
if (cookie != NULL && blk_rq_is_poll(req)) if (cookie != NULL && blk_rq_is_poll(req))
nvme_uring_task_meta_cb(ioucmd, IO_URING_F_UNLOCKED); nvme_uring_task_meta_cb(ioucmd, IO_URING_F_UNLOCKED);
else else
io_uring_cmd_complete_in_task(ioucmd, nvme_uring_task_meta_cb); io_uring_cmd_do_in_task_lazy(ioucmd, nvme_uring_task_meta_cb);
return RQ_END_IO_NONE; return RQ_END_IO_NONE;
} }