linux-kernel - Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408!

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Message-ID: <CAPub14-rsUfP00D4J6ttwLAD-72SccYKakp2ZCncGzhPgNC21Q@mail.gmail.com>
Date:	Wed, 13 Jan 2016 18:02:38 +0530
From:	Shiraz Hashim <shiraz.linux.kernel@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Michal Hocko <mhocko@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408!

On Wed, Jan 13, 2016 at 5:06 PM, Shiraz Hashim
<shiraz.linux.kernel@...il.com> wrote:
>
> Can you please give it a try, seems it is reproducing easily at your end.
>

Ahh!, it cannot be done as it is called with preemption disabled.

[    8.131226] Process swapper/4 (pid: 0, stack limit = 0xffffffc06fc18058)
[    8.137908] Call trace:
[    8.140344] [<ffffffc0000c19cc>] __might_sleep+0x15c/0x16c
[    8.145812] [<ffffffc0000b3d64>] flush_work+0x3c/0x190
[    8.150933] [<ffffffc0000b4450>] __cancel_work_timer+0x138/0x1e4
[    8.156922] [<ffffffc0000b45a8>] cancel_delayed_work_sync+0xc/0x18
[    8.163087] [<ffffffc0001782dc>] quiet_vmstat+0x3c/0x60
[    8.168294] [<ffffffc0000dd2f0>] cpu_startup_entry+0x2c/0x330
[    8.174024] [<ffffffc000090b24>] secondary_start_kernel+0x124/0x134

-- 
regards
Shiraz Hashim