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SubjectRe: [PATCH] selftests: Print the test we're running to /dev/kmsg
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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

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