linux-kernel - [linus:master] [mm,madvise,hugetlb] 8ebe0a5eaa: kernel-selftests.vm.run_vmtests.sh../hugetlb_madvise_./huge/madvise

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Date:   Fri, 4 Nov 2022 07:22:10 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Rik van Riel <riel@...riel.com>
CC:     <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        "David Hildenbrand" <david@...hat.com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: [linus:master] [mm,madvise,hugetlb]  8ebe0a5eaa:
 kernel-selftests.vm.run_vmtests.sh../hugetlb_madvise_./huge/madvise_test.fail


Greeting,

FYI, we noticed kernel-selftests.vm.run_vmtests.sh../hugetlb_madvise_./huge/madvise_test.fail due to commit (built with gcc-11):

commit: 8ebe0a5eaaeb099de03d09ad20f54ed962e2261e ("mm,madvise,hugetlb: fix unexpected data loss with MADV_DONTNEED on hugetlbfs")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: kernel-selftests
version: kernel-selftests-x86_64-9313ba54-1_20221017
with following parameters:

	sc_nr_hugepages: 2
	group: vm

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: 4 threads 1 sockets Intel(R) Core(TM) i3-3220 CPU @ 3.30GHz (Ivy Bridge) with 8G memory

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



If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202211040619.2ec447d7-oliver.sang@intel.com


# ---------------------------------------------
# running ./hugetlb-madvise ./huge/madvise-test
# ---------------------------------------------
# Unexpected number of free huge pages line 212
# [FAIL]
# NOTE: The above hugetlb tests provide minimal coverage.  Use
#       https://github.com/libhugetlbfs/libhugetlbfs.git for
#       hugetlb regression testing.



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



View attachment "config-6.1.0-rc1-00029-g8ebe0a5eaaeb" of type "text/plain" (171028 bytes)

View attachment "job-script" of type "text/plain" (6186 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (28176 bytes)

View attachment "kernel-selftests" of type "text/plain" (67336 bytes)

View attachment "job.yaml" of type "text/plain" (5135 bytes)

View attachment "reproduce" of type "text/plain" (273 bytes)