linux-kernel - [lkp-robot] [rcuperf] 87c458e630: WARNING:at_arch/x86/kernel/smp.c:#native_smp_send

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Message-ID: <20170504025926.GK14967@yexl-desktop>
Date:   Thu, 4 May 2017 10:59:26 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, lkp@...org
Subject: [lkp-robot] [rcuperf]  87c458e630:
 WARNING:at_arch/x86/kernel/smp.c:#native_smp_send_reschedule


FYI, we noticed the following commit:

commit: 87c458e6304c6a1b37bf856e88c70fc37f08851f ("rcuperf: Set more user-friendly defaults")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2017.04.21a

in testcase: boot

on test machine: qemu-system-x86_64 -enable-kvm -cpu host -smp 2 -m 1G

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


+----------------------------------------------------------------------------------+------------+------------+
|                                                                                  | 7984237c13 | 87c458e630 |
+----------------------------------------------------------------------------------+------------+------------+
| boot_successes                                                                   | 0          | 6          |
| boot_failures                                                                    | 30         | 24         |
| invoked_oom-killer:gfp_mask=0x                                                   | 30         |            |
| Mem-Info                                                                         | 30         |            |
| Out_of_memory:Kill_process                                                       | 30         |            |
| page_allocation_failure:order:#,mode:#(GFP_KERNEL|__GFP_NORETRY),nodemask=(null) | 7          |            |
| BUG:kernel_hang_in_test_stage                                                    | 0          | 18         |
| WARNING:at_arch/x86/kernel/smp.c:#native_smp_send_reschedule                     | 0          | 14         |
+----------------------------------------------------------------------------------+------------+------------+



[   15.553978] WARNING: CPU: 0 PID: 9 at arch/x86/kernel/smp.c:127 native_smp_send_reschedule+0x4f/0x68
[   15.556230] Modules linked in:
[   15.556868] CPU: 0 PID: 9 Comm: migration/0 Not tainted 4.11.0-rc2-00091-g87c458e #1
[   15.558408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[   15.560409] Call Trace:
[   15.560937]  dump_stack+0x61/0x7e
[   15.561604]  __warn+0xc2/0xdd
[   15.562219]  warn_slowpath_null+0x1d/0x1f
[   15.563027]  native_smp_send_reschedule+0x4f/0x68
[   15.564061]  resched_curr+0x9e/0x168
[   15.564792]  check_preempt_curr+0x4a/0x92
[   15.565592]  move_queued_task+0x1cc/0x1d6
[   15.566415]  __migrate_task+0x88/0x97
[   15.567158]  migration_cpu_stop+0x77/0xa4
[   15.567968]  ? sched_ttwu_pending+0xbd/0xbd
[   15.568815]  cpu_stopper_thread+0x84/0xf3
[   15.569613]  ? sort_range+0x22/0x22
[   15.570326]  smpboot_thread_fn+0x1cc/0x1e3
[   15.571164]  kthread+0x12d/0x135
[   15.571825]  ? kthread_create_on_node+0x3f/0x3f
[   15.572742]  ret_from_fork+0x2c/0x40
[   15.573468] ---[ end trace ce70cc5403b8b2a1 ]---


To reproduce:

        git clone https://github.com/01org/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-4.11.0-rc2-00091-g87c458e" of type "text/plain" (92755 bytes)

View attachment "job-script" of type "text/plain" (4325 bytes)

Download attachment "dmesg.xz" of type "application/octet-stream" (13476 bytes)