On 03/23/2018 03:44 AM, Michael Ellerman wrote:

Some tests cause the kernel to print things to the kernel log buffer (ie. printk), in particular oops and warnings etc. However when running all the tests in succession it's not always obvious which test(s) caused the kernel to print something.

We can narrow it down by printing which test directory we're running in to /dev/kmsg, if it's writable.

Example output:

[ 170.149149] kselftest: Running tests in powerpc [ 305.300132] kworker/dying (71) used greatest stack depth: 7776 bytes left [ 808.915456] kselftest: Running tests in pstore

Signed-off-by: Michael Ellerman mpe@ellerman.id.au

tools/testing/selftests/Makefile | 1 + 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 7442dfb73b7f..0fbe778efd5f 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -130,6 +130,7 @@ ifdef INSTALL_PATH BUILD_TARGET=$$BUILD/$$TARGET; \ echo "echo ; echo Running tests in $$TARGET" >> $(ALL_SCRIPT); \ echo "echo ========================================" >> $(ALL_SCRIPT); \

• echo "[ -w /dev/kmsg ] && echo \"kselftest: Running tests in $$TARGET\" >> /dev/kmsg" >> $(ALL_SCRIPT); \
  

  echo "cd $$TARGET" >> $(ALL_SCRIPT); \ make -s --no-print-directory OUTPUT=$$BUILD_TARGET -C $$TARGET emit_tests >> $(ALL_SCRIPT); \ echo "cd $$ROOT" >> $(ALL_SCRIPT); \

Thanks Michael. I will get this to 4.17-rc1

-- Shuah -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html