selftests: ublk: add generic_01 for verifying sequential IO order

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block layer, ublk and io_uring might re-order IO in the past

- plug

- queue ublk io command via task work

Add one test for verifying if sequential WRITE IO is dispatched in order.

- null target is taken, so we can just observe io order from
`tracepoint:block:block_rq_complete` which represents the dispatch order

- WRITE IO is taken because READ may come from system-wide utility

Cc: Uday Shankar <ushankar@purestorage.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20250322093218.431419-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Ming Lei 2025-03-22 17:32:09 +08:00 • committed by Jens Axboe

parent ffde32a49a

commit 723977cab4

4 changed files with 94 additions and 1 deletions

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4

tools/testing/selftests/ublk/Makefile

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22

tools/testing/selftests/ublk/test_common.sh

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44

tools/testing/selftests/ublk/test_generic_01.sh Executable file

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tools/testing/selftests/ublk/trace/seq_io.bt

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