linux-kernel - [lkp-robot] [mm, mlock, vmscan] 9c4e6b1a70: kernel

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Date:   Fri, 2 Mar 2018 17:39:40 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     Shakeel Butt <shakeelb@...gle.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Jérôme Glisse <jglisse@...hat.com>,
        Huang Ying <ying.huang@...el.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Michal Hocko <mhocko@...nel.org>,
        Greg Thelen <gthelen@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Balbir Singh <bsingharora@...il.com>,
        Minchan Kim <minchan@...nel.org>, Shaohua Li <shli@...com>,
        Jan Kara <jack@...e.cz>, Nicholas Piggin <npiggin@...il.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Mel Gorman <mgorman@...e.de>, Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp-robot] [mm, mlock, vmscan]  9c4e6b1a70:
 kernel_selftests.vm.mlock2-tests.fail


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

commit: 9c4e6b1a7027f102990c0395296015a812525f4d ("mm, mlock, vmscan: no more skipping pagevecs")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: kernel_selftests
with following parameters:

	group: kselftests-03

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: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 4G

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




KERNEL SELFTESTS: linux_headers_dir is /usr/src/linux-headers-x86_64-rhel-7.2-9c4e6b1a7027f102990c0395296015a812525f4d
2018-03-01 17:58:33 ln -sf /usr/bin/gcc-5 /usr/bin/gcc
...
--------------------
running mlock2-tests
--------------------
Failed to make faulted page unevictable
Failed to make faulted page unevictable
Failed to make present page unevictable
[FAIL]


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script  # job-script is attached in this email



Thanks,
Xiaolong

View attachment "config-4.16.0-rc2-00069-g9c4e6b1" of type "text/plain" (166095 bytes)

View attachment "job-script" of type "text/plain" (5540 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (29692 bytes)

View attachment "kernel_selftests" of type "text/plain" (66818 bytes)