Re: [PATCH] selftests: Install settings files to fix TIMEOUT failures

From: Shuah Khan
Date: Fri Feb 21 2020 - 10:20:00 EST

On 2/20/20 10:12 PM, Michael Ellerman wrote:
Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> writes:
On 2/20/20 3:51 PM, Kees Cook wrote:
On Thu, Feb 20, 2020 at 03:42:41PM +1100, Michael Ellerman wrote:
Commit 852c8cbf34d3 ("selftests/kselftest/ Add 45 second
timeout per test") added a 45 second timeout for tests, and also added
a way for tests to customise the timeout via a settings file.

For example the ftrace tests take multiple minutes to run, so they
were given longer in commit b43e78f65b1d ("tracing/selftests: Turn off
timeout setting").

This works when the tests are run from the source tree. However if the
tests are installed with "make -C tools/testing/selftests install",
the settings files are not copied into the install directory. When the
tests are then run from the install directory the longer timeouts are
not applied and the tests timeout incorrectly.

Eek, yes, nice catch.

So add the settings files to TEST_FILES of the appropriate Makefiles
to cause the settings files to be installed using the existing install

Instead, shouldn't "notice" the settings file and automatically
include it in TEST_FILES instead of having to do this in each separate

Let's keep it custom per test for now.

Yeah that seems less magical.

FWIW the patch below does work, so it's a small patch, but I'm not sure
it's worth the added complexity vs just listing the file in the few
tests that need it.

I am not seeing a whole lot of benefit in doing this in
Test authors have to think about which files to include in
TEST_FILES and add it to Makefile anyway.

My second reason is I would like authors to think about the settings
as opposed to just duplicate from another test. This timeout changes
the kselftest run-time and behavior.

I am also finding making features generic has downsides to it unless
we are smart about it. We have several overrides already for things
that made perfect sense to make generic.

diff --git a/tools/testing/selftests/ b/tools/testing/selftests/
index 1c8a1963d03f..82086c6ad5e7 100644
--- a/tools/testing/selftests/
+++ b/tools/testing/selftests/
@@ -20,6 +20,10 @@ TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))
TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
+ifeq ($(wildcard settings),settings)
+ TEST_FILES += settings
top_srcdir ?= ../../../..
include $(top_srcdir)/scripts/subarch.include

Thanks for the patch though. We can consider adding it a later time, if
we see value in making this generic.

-- Shuah