linux-kernel - [linus:master] [memcg] 1813e51eec: kernel-selftests.cgroup.test_kmem.test_kmem_memcg

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Message-ID: <202212010958.c1053bd3-yujie.liu@intel.com>
Date:   Thu, 1 Dec 2022 16:05:44 +0800
From:   kernel test robot <yujie.liu@...el.com>
To:     Shakeel Butt <shakeelb@...gle.com>
CC:     <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kernel test robot <oliver.sang@...el.com>,
        Soheil Hassas Yeganeh <soheil@...gle.com>,
        Feng Tang <feng.tang@...el.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Muchun Song <songmuchun@...edance.com>,
        Michal Hocko <mhocko@...e.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Koutný <mkoutny@...e.com>,
        <linux-kernel@...r.kernel.org>
Subject: [linus:master] [memcg] 1813e51eec:
 kernel-selftests.cgroup.test_kmem.test_kmem_memcg_deletion.fail

Greeting,

FYI, we noticed kernel-selftests.cgroup.test_kmem.test_kmem_memcg_deletion.fail due to commit (built with gcc-11):

commit: 1813e51eece0ad6f4aacaeb738e7cced46feb470 ("memcg: increase MEMCG_CHARGE_BATCH to 64")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linux-next/master 700e0cd3a5ce6a2cb90d9a2aab729b52f092a7d6]

in testcase: kernel-selftests
version: kernel-selftests-x86_64-2ed09c3b-1_20221128
with following parameters:

	group: cgroup

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: 128 threads 2 sockets Intel(R) Xeon(R) Platinum 8358 CPU @ 2.60GHz (Ice Lake) with 128G memory

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


# memory.current = 40161280
# slab + anon + file + kernel_stack = 14478624
# slab = 13453184
# anon = 0
# file = 0
# kernel_stack = 0
# pagetables = 0
# percpu = 1025440
# sock = 0
# not ok 2 test_kmem_memcg_deletion  <--
# ok 3 test_kmem_proc_kpagecgroup
# ok 4 test_kmem_kernel_stacks
# ok 5 test_kmem_dead_cgroups
# ok 6 test_percpu_basic
not ok 2 selftests: cgroup: test_kmem # exit=1


Please be noted that there are other failed cases in the log which
should be unrelated with this commit. The only change we caught is that
"test_kmem_memcg_deletion" turned out to be "not ok" on this commit,
while it is "ok" on its parent commit. Thanks.


If you fix the issue, kindly add following tag
| Reported-by: kernel test robot <yujie.liu@...el.com>
| Link: https://lore.kernel.org/oe-lkp/202212010958.c1053bd3-yujie.liu@intel.com


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-6.0.0-rc3-00089-g1813e51eece0" of type "text/plain" (169509 bytes)

View attachment "job-script" of type "text/plain" (6491 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (66708 bytes)

View attachment "kernel-selftests" of type "text/plain" (28241 bytes)

View attachment "job.yaml" of type "text/plain" (5598 bytes)

View attachment "reproduce" of type "text/plain" (242 bytes)