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io_uring/nop: add IORING_NOP_TW completion flag

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To test and profile the overhead of io_uring task_work and the various
types of it, add IORING_NOP_TW which tells nop to signal completions
through task_work rather than complete them inline.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2025-06-13 17:05:19 -06:00
parent ecf47d452c
commit cb9ccfb404
2 changed files with 8 additions and 1 deletions
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1
include/uapi/linux/io_uring.h
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@@ -449,6 +449,7 @@ enum io_uring_msg_ring_flags {
#define IORING_NOP_FILE (1U << 1)
#define IORING_NOP_FIXED_FILE (1U << 2)
#define IORING_NOP_FIXED_BUFFER (1U << 3)
#define IORING_NOP_TW (1U << 4)
/*
* IO completion data structure (Completion Queue Entry)