4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michael Ellerman mpe@ellerman.id.au
[ Upstream commit 88893cf787d3062c631cc20b875068eb11756e03 ]
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 Signed-off-by: Shuah Khan shuahkh@osg.samsung.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/Makefile | 1 + 1 file changed, 1 insertion(+)
--- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -94,6 +94,7 @@ ifdef INSTALL_PATH for TARGET in $(TARGETS); do \ 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 $$TARGET" >> $(ALL_SCRIPT); \ make -s --no-print-directory -C $$TARGET emit_tests >> $(ALL_SCRIPT); \ echo "cd $$ROOT" >> $(ALL_SCRIPT); \