kernel.git/tools/testing/selftests/ublk/Makefile, branch master

selftests: ublk: improve I/O ordering test with bpftrace

2026-01-31T21:56:28Z

Remove test_generic_01.sh since block layer may reorder I/O, making the test prone to false positives. Apply the improvements to test_generic_02.sh instead, which supposes for covering ublk dispatch io order. Rework test_generic_02 to verify that ublk dispatch doesn't reorder I/O by comparing request start order with completion order using bpftrace. The bpftrace script now: - Tracks each request's start sequence number in a map keyed by sector - On completion, verifies the request's start order matches expected completion order - Reports any out-of-order completions detected The test script: - Wait bpftrace BEGIN code block is run - Pins fio to CPU 0 for deterministic behavior - Uses block_io_start and block_rq_complete tracepoints - Checks bpftrace output for reordering errors Reported-and-tested-by: Alexander Atanasov Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: reorganize tests into integrity and recover groups

2026-01-31T21:56:28Z

Move integrity-focused tests into new 'integrity' group: - test_null_04.sh -> test_integrity_01.sh - test_loop_08.sh -> test_integrity_02.sh Move recovery-focused tests into new 'recover' group: - test_generic_04.sh -> test_recover_01.sh - test_generic_05.sh -> test_recover_02.sh - test_generic_11.sh -> test_recover_03.sh - test_generic_14.sh -> test_recover_04.sh Update Makefile to reflect the reorganization. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add _ublk_sleep helper for parallel execution

2026-01-31T21:56:28Z

Add _ublk_sleep() helper function that uses different sleep times depending on whether tests run in parallel or sequential mode. Usage: _ublk_sleep Export JOBS variable from Makefile so test scripts can detect parallel execution, and use _ublk_sleep in test_part_02.sh to handle the partition scan delay (1s normal, 5s parallel). Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add group-based test targets

2026-01-31T21:56:28Z

Add convenient Makefile targets for running specific test groups: - run_generic, run_batch, run_null, run_loop, run_stripe, run_stress, etc. - run_all for running all tests Test groups are auto-detected from TEST_PROGS using pattern matching (test__.sh -> group), and targets are generated dynamically using define/eval templates. Supports parallel execution via JOBS variable: - JOBS=1 (default): sequential with kselftest TAP output - JOBS>1: parallel execution with xargs -P Usage examples: make run_null # Sequential execution make run_stress JOBS=4 # Parallel with 4 jobs make run_all JOBS=8 # Run all tests with 8 parallel jobs With JOBS=8, running time of `make run_all` is reduced to 2m2s from 6m5s in my test VM. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: rename test_generic_15 to test_part_02

2026-01-31T13:36:41Z

This test exercises partition scanning behavior, so move it to the test_part_* group for consistency. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add selftest for UBLK_F_NO_AUTO_PART_SCAN

2026-01-31T13:36:41Z

Add test_part_01.sh to test the UBLK_F_NO_AUTO_PART_SCAN feature flag which allows suppressing automatic partition scanning during device startup while still allowing manual partition probing. The test verifies: - Normal behavior: partitions are auto-detected without the flag - With flag: partitions are not auto-detected during START_DEV - Manual scan: blockdev --rereadpt works with the flag Also update kublk tool to support --no_auto_part_scan option and recognize the feature flag. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: support arbitrary threads/queues combination

2026-01-23T03:05:41Z

Enable flexible thread-to-queue mapping in batch I/O mode to support arbitrary combinations of threads and queues, improving resource utilization and scalability. Key improvements: - Support N:M thread-to-queue mapping (previously limited to 1:1) - Dynamic buffer allocation based on actual queue assignment per thread - Thread-safe queue preparation with spinlock protection - Intelligent buffer index calculation for multi-queue scenarios - Enhanced validation for thread/queue combination constraints Implementation details: - Add q_thread_map matrix to track queue-to-thread assignments - Dynamic allocation of commit and fetch buffers per thread - Round-robin queue assignment algorithm for load balancing - Per-queue spinlock to prevent race conditions during prep - Updated buffer index calculation using queue position within thread This enables efficient configurations like: - Any other N:M combinations for optimal resource matching Testing: - Added test_batch_02.sh: 4 threads vs 1 queue - Added test_batch_03.sh: 1 thread vs 4 queues - Validates correctness across different mapping scenarios Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add --batch/-b for enabling F_BATCH_IO

2026-01-23T03:05:41Z

Add --batch/-b for enabling F_BATCH_IO. Add batch_01 for covering its basic function. Add stress_08 and stress_09 for covering stress test. Add recovery test for F_BATCH_IO in generic_04 and generic_05. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: increase timeout to 150 seconds

2026-01-23T03:05:41Z

More tests need to be covered in existing generic tests, and default 45sec isn't enough, and timeout is often triggered, increase timeout by adding setting file. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe

selftests: ublk: add stop command with --safe option

2026-01-12T22:07:31Z

Add 'stop' subcommand to kublk utility that uses the new UBLK_CMD_TRY_STOP_DEV command when --safe option is specified. This allows stopping a device only if it has no active openers, returning -EBUSY otherwise. Also add test_generic_16.sh to test the new functionality. Signed-off-by: Ming Lei Signed-off-by: Jens Axboe