linux-kernel - [freezer,sched] d97bfb5c8b: WARNING:at_kernel/kthread.c:#__kthread_bind

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Message-ID: <20220412100340.GB2642@xsang-OptiPlex-9020>
Date:   Tue, 12 Apr 2022 18:03:40 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>, lkp@...ts.01.org, lkp@...el.com,
        LKML <linux-kernel@...r.kernel.org>, aubrey.li@...ux.intel.com,
        yu.c.chen@...el.com
Subject: [freezer,sched]  d97bfb5c8b:
 WARNING:at_kernel/kthread.c:#__kthread_bind_mask



Greeting,

FYI, we noticed the following commit (built with gcc-11):

commit: d97bfb5c8b833363ad581ccd1c242d1f3641ff2f ("freezer,sched: Rewrite core freezer logic")
https://git.kernel.org/cgit/linux/kernel/git/peterz/queue.git sched/wip.freezer

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G

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



please be noted we found the issue not always happen, but rate is high.
also see some other random issues. parent keeps clean

f088bb97d58692c1 d97bfb5c8b833363ad581ccd1c2
---------------- ---------------------------
       fail:runs  %reproduction    fail:runs
           |             |             |
           :56          75%          42:56    dmesg.RIP:__kthread_bind_mask
           :56           9%           5:56    dmesg.RIP:kthread_set_per_cpu
           :56           7%           4:56    dmesg.RIP:process_one_work
           :56          75%          42:56    dmesg.WARNING:at_kernel/kthread.c:#__kthread_bind_mask
           :56           9%           5:56    dmesg.WARNING:at_kernel/kthread.c:#kthread_set_per_cpu
           :56           7%           4:56    dmesg.WARNING:at_kernel/workqueue.c:#process_one_work


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


[    0.789910][    T7] ------------[ cut here ]------------
[    0.790890][    T7] WARNING: CPU: 0 PID: 7 at kernel/kthread.c:524 __kthread_bind_mask+0x1d/0x5b
[    0.792498][    T7] Modules linked in:
[    0.793212][    T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.18.0-rc1-00099-gd97bfb5c8b83 #8
[    0.794724][    T7] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[    0.796386][    T7] RIP: 0010:__kthread_bind_mask+0x1d/0x5b
[    0.798274][    T7] Code: fa ff ff 48 85 c0 74 f3 48 8b 40 60 c3 0f 1f 44 00 00 41 55 41 54 49 89 f4 89 d6 55 53 48 89 fb e8 ee cc 00 00 48 85 c0 75 09 <
0f> 0b 5b 5d 41 5c 41 5d c3 4c 8d ab 64 07 00 00 4c 89 ef e8 9a 7f
[    0.801415][    T7] RSP: 0000:ffffc90000043e88 EFLAGS: 00010246
[    0.802477][    T7] RAX: 0000000000000000 RBX: ffff88810d180f40 RCX: 0000000000000000
[    0.803828][    T7] RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88810d180f40
[    0.805228][    T7] RBP: ffff88810c87c000 R08: 000000000000000c R09: 00000000313a3475
[    0.806664][    T7] R10: ffff88810d1aba80 R11: fefefefefefefeff R12: ffff88810c878428
[    0.808022][    T7] R13: 0000000000000001 R14: ffff88810c87c2c0 R15: ffffc90000013de0
[    0.809407][    T7] FS:  0000000000000000(0000) GS:ffff88842fc00000(0000) knlGS:0000000000000000
[    0.810932][    T7] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    0.812011][    T7] CR2: ffff88843ffff000 CR3: 0000000002612000 CR4: 00000000000406f0
[    0.815679][    T7] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    0.817106][    T7] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[    0.818444][    T7] Call Trace:
[    0.819064][    T7]  <TASK>
[    0.819628][    T7]  create_worker+0x108/0x179
[    0.820459][    T7]  worker_thread+0xdb/0x230
[    0.821240][    T7]  ? rescuer_thread+0x29b/0x29b
[    0.822091][    T7]  kthread+0xd2/0xda
[    0.822839][    T7]  ? kthread_complete_and_exit+0x1b/0x1b
[    0.823849][    T7]  ret_from_fork+0x22/0x30
[    0.824639][    T7]  </TASK>
[    0.825231][    T7] ---[ end trace 0000000000000000 ]---



To reproduce:

        # build kernel
	cd linux
	cp config-5.18.0-rc1-00099-gd97bfb5c8b83 .config
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
	make HOSTCC=gcc-11 CC=gcc-11 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
	cd <mod-install-dir>
	find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz


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

        # 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-5.18.0-rc1-00099-gd97bfb5c8b83" of type "text/plain" (123171 bytes)

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