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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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selftests: net: ksft: print more of the stack for checks

Print more stack frames and the failing line when check fails.
This helps when tests use helpers to do the checks.

Before:

# At ./ksft/drivers/net/hw/rss_ctx.py line 92:
# Check failed 1037698 >= 396893.0 traffic on other queues:[344612, 462380, 233020, 449174, 342298]
not ok 8 rss_ctx.test_rss_context_queue_reconfigure

After:

# Check| At ./ksft/drivers/net/hw/rss_ctx.py, line 387, in test_rss_context_queue_reconfigure:
# Check| test_rss_queue_reconfigure(cfg, main_ctx=False)
# Check| At ./ksft/drivers/net/hw/rss_ctx.py, line 230, in test_rss_queue_reconfigure:
# Check| _send_traffic_check(cfg, port, ctx_ref, { 'target': (0, 3),
# Check| At ./ksft/drivers/net/hw/rss_ctx.py, line 92, in _send_traffic_check:
# Check| ksft_lt(sum(cnts[i] for i in params['noise']), directed / 2,
# Check failed 1045235 >= 405823.5 traffic on other queues (context 1)':[460068, 351995, 565970, 351579, 127270]
not ok 8 rss_ctx.test_rss_context_queue_reconfigure

Link: https://patch.msgid.link/20240801232317.545577-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Jakub Kicinski 46619175 a48395f2

+12 -2
+12 -2
tools/testing/selftests/net/lib/py/ksft.py
··· 34 34 global KSFT_RESULT 35 35 KSFT_RESULT = False 36 36 37 - frame = inspect.stack()[2] 38 - ksft_pr("At " + frame.filename + " line " + str(frame.lineno) + ":") 37 + stack = inspect.stack() 38 + started = False 39 + for frame in reversed(stack[2:]): 40 + # Start printing from the test case function 41 + if not started: 42 + if frame.function == 'ksft_run': 43 + started = True 44 + continue 45 + 46 + ksft_pr("Check| At " + frame.filename + ", line " + str(frame.lineno) + 47 + ", in " + frame.function + ":") 48 + ksft_pr("Check| " + frame.code_context[0].strip()) 39 49 ksft_pr(*args) 40 50 41 51