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Date:   Fri, 10 May 2019 20:53:00 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        shuah <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org, daniel@...earbox.net,
        davem@...emloft.net, skhan@...uxfoundation.org
Subject: Re: [GIT PULL] Kselftest update for Linux 5.2-rc1

On 5/9/19 8:17 PM, Alexei Starovoitov wrote:
> On Thu, May 09, 2019 at 07:42:09PM -0600, Shuah Khan wrote:
>> On 5/9/19 4:40 PM, Shuah Khan wrote:
>>> On 5/9/19 4:20 PM, Alexei Starovoitov wrote:
>>>> On Mon, May 06, 2019 at 10:56:56AM -0600, Shuah Khan wrote:
>>>>> Hi Linus,
>>>>>
>>>>> Please pull the following Kselftest update for Linux 5.2-rc1
>>>>>
>>>>> This Kselftest update for Linux 5.2-rc1 consists of
>>>>>
>>>>> - fixes to seccomp test, and kselftest framework
>>>>> - cleanups to remove duplicate header defines
>>>>> - fixes to efivarfs "make clean" target
>>>>> - cgroup cleanup path
>>>>> - Moving the IMA kexec_load selftest to selftests/kexec work from
>>>>>     Mimi Johar and Petr Vorel
>>>>> - A framework to kselftest for writing kernel test modules addition
>>>>>     from Tobin C. Harding
>>>>>
>>>>> diff is attached.
>>>>>
>>>>> thanks,
>>>>> -- Shuah
>>>>>
>>>>>
>>>>> ----------------------------------------------------------------
>>>>> The following changes since commit
>>>>> 15ade5d2e7775667cf191cf2f94327a4889f8b9d:
>>>>>
>>>>>     Linux 5.1-rc4 (2019-04-07 14:09:59 -1000)
>>>>>
>>>>> are available in the Git repository at:
>>>>>
>>>>>     git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
>>>>> tags/linux-kselftest-5.2-rc1
>>>>>
>>>>> for you to fetch changes up to d917fb876f6eaeeea8a2b620d2a266ce26372f4d:
>>>>>
>>>>>     selftests: build and run gpio when output directory is the src dir
>>>>> (2019-04-22 17:02:26 -0600)
>>>>>
>>>>> ----------------------------------------------------------------
>>>>> linux-kselftest-5.2-rc1
>>>>>
>>>>> This Kselftest update for Linux 5.2-rc1 consists of
>>>>>
>>>>> - fixes to seccomp test, and kselftest framework
>>>>> - cleanups to remove duplicate header defines
>>>>> - fixes to efivarfs "make clean" target
>>>>> - cgroup cleanup path
>>>>> - Moving the IMA kexec_load selftest to selftests/kexec work from
>>>>>     Mimi Johar and Petr Vorel
>>>>> - A framework to kselftest for writing kernel test modules addition
>>>>>     from Tobin C. Harding
>>>>>
>>>>> ----------------------------------------------------------------
>>>>> Kees Cook (3):
>>>>>         selftests/seccomp: Handle namespace failures gracefully
>>>>>         selftests/harness: Add 30 second timeout per test
>>>>>         selftests/ipc: Fix msgque compiler warnings
>>>>>
>>>>> Mathieu Desnoyers (1):
>>>>>         rseq/selftests: Adapt number of threads to the number of
>>>>> detected cpus
>>>>>
>>>>> Mimi Zohar (9):
>>>>>         selftests/kexec: move the IMA kexec_load selftest to
>>>>> selftests/kexec
>>>>>         selftests/kexec: cleanup the kexec selftest
>>>>>         selftests/kexec: define a set of common functions
>>>>>         selftests/kexec: define common logging functions
>>>>>         selftests/kexec: define "require_root_privileges"
>>>>>         selftests/kexec: kexec_file_load syscall test
>>>>>         selftests/kexec: check kexec_load and kexec_file_load are enabled
>>>>>         selftests/kexec: make kexec_load test independent of IMA
>>>>> being enabled
>>>>>         selftests/kexec: update get_secureboot_mode
>>>>>
>>>>> Petr Vorel (1):
>>>>>         selftests/kexec: Add missing '=y' to config options
>>>>>
>>>>> Po-Hsu Lin (1):
>>>>>         selftests/efivarfs: clean up test files from test_create*()
>>>>>
>>>>> Roman Gushchin (1):
>>>>>         selftests: cgroup: fix cleanup path in
>>>>> test_memcg_subtree_control()
>>>>>
>>>>> Sabyasachi Gupta (4):
>>>>>         selftest/x86/mpx-dig.c: Remove duplicate header
>>>>>         selftest/timers: Remove duplicate header
>>>>>         selftest/rseq: Remove duplicate header
>>>>>         selftest/gpio: Remove duplicate header
>>>>>
>>>>> Shuah Khan (2):
>>>>>         selftests: fix headers_install circular dependency
>>>>
>>>> Shuah,
>>>>
>>>> the commit 8ce72dc32578 ("selftests: fix headers_install circular
>>>> dependency")
>>>> broke our build/test workflow, since it added:
>>>>     ifneq ($(KBUILD_OUTPUT),)
>>>>             OUTPUT := $(KBUILD_OUTPUT)
>>>>     else
>>>>
>>>> which means that all of selftests/bpf artifacts are now going into
>>>> main build directory cluttering it with all sorts of .o, generated files
>>>> and executables.
>>>> The end result is humans and scripts can no longer find tests.
>>
>> bpf build fails with the above commit. However, even without it, I am
>> seeing bpf objects going to tools/testing/selftests/bpf
>>
>> I reverted the commit and ran your use-case:
>>
>> export KBUILD_OUTPUT=/tmp/kselftest_bpf
>> cd tools/testing/selftests/bpf/
>> make
>> ./test_verifier
>>
>> I see bpf objects in tools/testing/selftests/bpf/ and I can run the
>> test.
>>
>> What am I missing? The only way ./test_verifier would work is if
>> test_verifier is in tools/testing/selftests/bpf/
> 
> That's the point. All artifacts should be in tools/testing/selftests/bpf/
> if 'make' was done there regardless of KBUILD_OUTPUT.
> 

Alexei,

Thanks for reporting the problem. Fix is on the way. Please test and let
me know if it works for you. I verified bpf build/test workflow with
and without KBUILD_OUTPUT set.

thanks,
-- Shuah

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