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From: Andre Wild <wild@linux.vnet.ibm.com>
Subject: BUG: using __this_cpu_read() in preemptible [00000000] code:
 mm_percpu_wq/7
Date: Wed, 7 Jun 2017 11:05:32 +0200
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To: cl@linux.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, heiko.carstens@de.ibm.com

Hi Christoph,

I'm currently seeing the following message running kernel version 4.11.0.
It looks like it was introduced with the patch 4037d452202e34214e8a939fa5621b2b3bbb45b7.
Can you please take a look at this problem?

[Tue Jun  6 15:27:03 2017] BUG: using __this_cpu_read() in preemptible [00000000] code: mm_percpu_wq/7
[Tue Jun  6 15:27:03 2017] caller is refresh_cpu_vm_stats+0x198/0x3d8
[Tue Jun  6 15:27:03 2017] CPU: 0 PID: 7 Comm: mm_percpu_wq Tainted: G        W       4.11.0-20170529.0.ae409ab.224a322.fc25.s390xdefault #1
[Tue Jun  6 15:27:03 2017] Workqueue: mm_percpu_wq vmstat_update
[Tue Jun  6 15:27:03 2017] Call Trace:
[Tue Jun  6 15:27:03 2017] ([<00000000001138ea>] show_trace+0x8a/0xe0)
[Tue Jun  6 15:27:03 2017]  [<00000000001139c0>] show_stack+0x80/0xd8
[Tue Jun  6 15:27:03 2017]  [<000000000074488e>] dump_stack+0x96/0xd8
[Tue Jun  6 15:27:03 2017]  [<000000000077afaa>] check_preemption_disabled+0xea/0x108
[Tue Jun  6 15:27:03 2017]  [<00000000002ec198>] refresh_cpu_vm_stats+0x198/0x3d8
[Tue Jun  6 15:27:03 2017]  [<00000000002ed306>] vmstat_update+0x2e/0x98
[Tue Jun  6 15:27:03 2017]  [<0000000000167450>] process_one_work+0x3d8/0x780
[Tue Jun  6 15:27:03 2017]  [<00000000001688dc>] rescuer_thread+0x224/0x3d0
[Tue Jun  6 15:27:03 2017]  [<0000000000170096>] kthread+0x166/0x178
[Tue Jun  6 15:27:03 2017]  [<0000000000a4d69a>] kernel_thread_starter+0x6/0xc
[Tue Jun  6 15:27:03 2017]  [<0000000000a4d694>] kernel_thread_starter+0x0/0xc
[Tue Jun  6 15:27:03 2017] INFO: lockdep is turned off.


Kind regards,

AndrA(C)

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