Re: [PATCH] tracing: Fix missing errno when zero parser->idx in trace_pid_write

On Tue, 2 Sep 2025 23:09:53 +0800
kernel test robot [off-list ref] wrote:

commit: cebdd2c9a622becc41349f32ace1795d750beda8 ("[PATCH] tracing: Fix missing errno when zero parser->idx in trace_pid_write")
url: https://github.com/intel-lab-lkp/linux/commits/Pu-Lehui/tracing-Fix-missing-errno-when-zero-parser-idx-in-trace_pid_write/20250821-151736
base: https://git.kernel.org/cgit/linux/kernel/git/trace/linux-trace for-next
patch link: https://lore.kernel.org/all/20250821071721.3609109-1-pulehui@huaweicloud.com/ (local)
patch subject: [PATCH] tracing: Fix missing errno when zero parser->idx in trace_pid_write

in testcase: perf-sanity-tests
version: 
with following parameters:

	perf_compiler: gcc
	group: group-01

This is why I hate LKP. It's huge, complex, and I never can get it working.

I did the following:

 # lkp split-job jobs/perf-sanity-tests.yaml
 # lkp install -f ./perf-sanity-tests-defaults.yaml

[ had to fix python up a little because it wanted python3.9 where I had 3.13 ]

 # lkp run ./perf-sanity-tests-defaults.yaml
/work/git/lkp-tests.git/programs/perf-sanity-tests/run: 7: .: cannot open /work/git/lkp-tests.git/lib/tests/perf_test.sh: No such file
kill 37975 vmstat --timestamp -n 10 
kill 37973 dmesg --follow --decode 
wait for background processes: 37978 meminfo


I have no idea where this "perf_test.sh" is supposed to come from, and why
it doesn't exist :-p


-- Steve