selftests: Print the test we're running to /dev/kmsg

[ Upstream commit 88893cf ] 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 <[email protected]> Signed-off-by: Shuah Khan <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
maraz · May 30, 2018 · d018d55 · d018d55
1 parent faace30
commit d018d55
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
@@ -122,6 +122,7 @@ 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); \