linux-kernel - [lkp-robot] [proc] 89d98ff979: kernel_selftests.proc.proc-loadavg-001.fail

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Date:   Tue, 17 Apr 2018 10:54:26 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Shuah Khan <shuah@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp-robot] [proc]  89d98ff979:
 kernel_selftests.proc.proc-loadavg-001.fail


FYI, we noticed the following commit (built with gcc-7):

commit: 89d98ff9795717225187dd20c5c557ef16c37372 ("proc: add selftest for last field of /proc/loadavg")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: kernel_selftests
with following parameters:

	group: kselftests-02

test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel.
test-url: https://www.kernel.org/doc/Documentation/kselftest.txt


on test machine: 8 threads Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz with 8G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):



2018-04-11 00:11:20 make run_tests -C proc
make: Entering directory '/usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc'
gcc -Wall -O2    proc-loadavg-001.c  -o /usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc/proc-loadavg-001
gcc -Wall -O2    proc-self-map-files-001.c  -o /usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc/proc-self-map-files-001
gcc -Wall -O2    proc-self-map-files-002.c  -o /usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc/proc-self-map-files-002
gcc -Wall -O2    proc-self-syscall.c  -o /usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc/proc-self-syscall
gcc -Wall -O2    proc-self-wchan.c  -o /usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc/proc-self-wchan
TAP version 13
selftests: proc-loadavg-001
========================================
not ok 1..1 selftests:  proc-loadavg-001 [FAIL]
selftests: proc-self-map-files-001
========================================
ok 1..2 selftests: proc-self-map-files-001 [PASS]
selftests: proc-self-map-files-002
========================================
ok 1..3 selftests: proc-self-map-files-002 [PASS]
selftests: proc-self-syscall
========================================
ok 1..4 selftests: proc-self-syscall [PASS]
selftests: proc-self-wchan
========================================
ok 1..5 selftests: proc-self-wchan [PASS]
make: Leaving directory '/usr/src/linux-selftests-x86_64-rhel-7.2-89d98ff9795717225187dd20c5c557ef16c37372/tools/testing/selftests/proc'



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong

View attachment "config-4.16.0-rc7-00249-g89d98ff" of type "text/plain" (165965 bytes)

View attachment "job-script" of type "text/plain" (5903 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (44088 bytes)

View attachment "kernel_selftests" of type "text/plain" (66189 bytes)

View attachment "job.yaml" of type "text/plain" (5285 bytes)

View attachment "reproduce" of type "text/plain" (865 bytes)