linux-kernel - Re: [PATCH v1 9/9] selftests/mm: Run all tests from run

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Date:   Thu, 13 Jul 2023 17:25:36 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Ryan Roberts <ryan.roberts@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>,
        Jérôme Glisse <jglisse@...hat.com>,
        Mark Brown <broonie@...nel.org>,
        John Hubbard <jhubbard@...dia.com>,
        Florent Revest <revest@...omium.org>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, Peter Xu <peterx@...hat.com>
Subject: Re: [PATCH v1 9/9] selftests/mm: Run all tests from run_vmtests.sh

>>
>> Which run_kselftest.sh are you referring to, the one in the parent directory?
> 
> run_kselftest.sh is the uniform way of executing all the kselftests. mm seems to
> be trying to be special as far as I can see. Certainly if you run the `install`
> make target, kselftests will create a list of all the tests (including non-mm
> tests if you have included them in the TARGETS variable) and copy that test list
> and run_kselftest.sh to the install path along with all the test binaries. Then
> the user can invoke any of the collections or specific tests in the collections
> using that tool. It also wraps everything with tap output, runs tests with a
> timeout, etc.
> 
> See Documentation/dev-tools/kselftest.rst
> 

Got it, thanks!

>>
>> How to invoke it to run these mm tests?
>>
>> (I never dared invoking something different than
>> run_vmtests.sh ;) )
> 
> # single test:
> $ sudo ./run_kselftest.sh -t mm:<test_name>
> 
> or
> 
> # all tests in collection:
> $ sudo ./run_kselftest.sh -c mm
> 

Ah, that makes sense. So I guess mm is then one "collection".

>>
>> [...]
>>
>>>
>>> Signed-off-by: Ryan Roberts <ryan.roberts@....com>
>>> ---
>>>    tools/testing/selftests/mm/Makefile       | 79 ++++++++++++-----------
>>>    tools/testing/selftests/mm/run_vmtests.sh | 23 +++++++
>>>    tools/testing/selftests/mm/settings       |  2 +-
>>>    3 files changed, 64 insertions(+), 40 deletions(-)
>>>
>>> diff --git a/tools/testing/selftests/mm/Makefile
>>> b/tools/testing/selftests/mm/Makefile
>>> index 66d7c07dc177..881ed96d96fd 100644
>>> --- a/tools/testing/selftests/mm/Makefile
>>> +++ b/tools/testing/selftests/mm/Makefile
>>> @@ -35,39 +35,39 @@ MAKEFLAGS += --no-builtin-rules
>>>    CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES)
>>>    LDLIBS = -lrt -lpthread
>>>    -TEST_GEN_PROGS = cow
>>> -TEST_GEN_PROGS += compaction_test
>>> -TEST_GEN_PROGS += gup_longterm
>>> -TEST_GEN_PROGS += gup_test
>>> -TEST_GEN_PROGS += hmm-tests
>>> -TEST_GEN_PROGS += hugetlb-madvise
>>> -TEST_GEN_PROGS += hugepage-mmap
>>> -TEST_GEN_PROGS += hugepage-mremap
>>> -TEST_GEN_PROGS += hugepage-shm
>>> -TEST_GEN_PROGS += hugepage-vmemmap
>>> -TEST_GEN_PROGS += khugepaged
>>> -TEST_GEN_PROGS += madv_populate
>>> -TEST_GEN_PROGS += map_fixed_noreplace
>>> -TEST_GEN_PROGS += map_hugetlb
>>> -TEST_GEN_PROGS += map_populate
>>> -TEST_GEN_PROGS += memfd_secret
>>> -TEST_GEN_PROGS += migration
>>> -TEST_GEN_PROGS += mkdirty
>>> -TEST_GEN_PROGS += mlock-random-test
>>> -TEST_GEN_PROGS += mlock2-tests
>>> -TEST_GEN_PROGS += mrelease_test
>>> -TEST_GEN_PROGS += mremap_dontunmap
>>> -TEST_GEN_PROGS += mremap_test
>>> -TEST_GEN_PROGS += on-fault-limit
>>> -TEST_GEN_PROGS += thuge-gen
>>> -TEST_GEN_PROGS += transhuge-stress
>>> -TEST_GEN_PROGS += uffd-stress
>>> -TEST_GEN_PROGS += uffd-unit-tests
>>> -TEST_GEN_PROGS += soft-dirty
>>> -TEST_GEN_PROGS += split_huge_page_test
>>> -TEST_GEN_PROGS += ksm_tests
>>> -TEST_GEN_PROGS += ksm_functional_tests
>>> -TEST_GEN_PROGS += mdwe_test
>>> +TEST_GEN_FILES = cow
>>> +TEST_GEN_FILES += compaction_test
>>> +TEST_GEN_FILES += gup_longterm
>>> +TEST_GEN_FILES += gup_test
>>> +TEST_GEN_FILES += hmm-tests
>>> +TEST_GEN_FILES += hugetlb-madvise
>>> +TEST_GEN_FILES += hugepage-mmap
>>> +TEST_GEN_FILES += hugepage-mremap
>>> +TEST_GEN_FILES += hugepage-shm
>>> +TEST_GEN_FILES += hugepage-vmemmap
>>> +TEST_GEN_FILES += khugepaged
>>> +TEST_GEN_FILES += madv_populate
>>> +TEST_GEN_FILES += map_fixed_noreplace
>>> +TEST_GEN_FILES += map_hugetlb
>>> +TEST_GEN_FILES += map_populate
>>> +TEST_GEN_FILES += memfd_secret
>>> +TEST_GEN_FILES += migration
>>> +TEST_GEN_FILES += mkdirty
>>> +TEST_GEN_FILES += mlock-random-test
>>> +TEST_GEN_FILES += mlock2-tests
>>> +TEST_GEN_FILES += mrelease_test
>>> +TEST_GEN_FILES += mremap_dontunmap
>>> +TEST_GEN_FILES += mremap_test
>>> +TEST_GEN_FILES += on-fault-limit
>>> +TEST_GEN_FILES += thuge-gen
>>> +TEST_GEN_FILES += transhuge-stress
>>> +TEST_GEN_FILES += uffd-stress
>>> +TEST_GEN_FILES += uffd-unit-tests
>>> +TEST_GEN_FILES += soft-dirty
>>> +TEST_GEN_FILES += split_huge_page_test
>>> +TEST_GEN_FILES += ksm_tests
>>> +TEST_GEN_FILES += ksm_functional_tests
>>> +TEST_GEN_FILES += mdwe_test
>>
>> IIRC, we recently converted all to TEST_GEN_PROGS. See
>>
>> commit aef6fde75d8c6c1cad4a0e017a8d4cbee2143723
>> Author: Peter Xu <peterx@...hat.com>
>> Date:   Wed Apr 12 12:42:18 2023 -0400
>>
>>      selftests/mm: use TEST_GEN_PROGS where proper
>>          TEST_GEN_PROGS and TEST_GEN_FILES are used randomly in the mm/Makefile to
>>      specify programs that need to build.  Logically all these binaries should
>>      all fall into TEST_GEN_PROGS.
>>          Replace those TEST_GEN_FILES with TEST_GEN_PROGS, so that we can reference
>>      all the tests easily later.
>>
>>
>> Why is that change required, and how does it interact with
>> run_kselftest.sh? (Not clear from you patch description.)
> 
> TEST_GEN_PROGS will compile and install the tests and will add them to the list
> of tests that run_kselftest.sh will run. TEST_GEN_FILES will compile and install
> the tests but will not add them to the test list.
> 
> Note that run_vmtests.sh is added to TEST_PROGS, which means it ends up in the
> test list. (the lack of "_GEN" means it won't be compiled, but simply copied).
> 
> So with this change at the kselftest level, there is a single test in its list;
> run_vmtests.sh. And all the other tests that were previously in that list are
> moved into run_vmtests.sh (if they weren't there already).

That sound good to me. (worth adding to the patch description)

Let me CC Peter, so he's aware.

-- 
Cheers,

David / dhildenb