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

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Message-ID: <567C522E.50207@oracle.com>
Date:	Thu, 24 Dec 2015 15:14:38 -0500
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	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 12/21/2015 04:14 PM, Christoph Lameter wrote:
> On Mon, 21 Dec 2015, Sasha Levin wrote:
> 
>> > I've also noticed a new warning from the workqueue code which my scripts
>> > didn't pick up before:
>> >
>> > [ 3462.380681] BUG: workqueue lockup - pool cpus=2 node=2 flags=0x4 nice=0 stuck for 54s!
>> > [ 3462.522041] workqueue vmstat: flags=0xc
>> > [ 3462.527795]   pwq 4: cpus=2 node=2 flags=0x0 nice=0 active=1/256
>> > [ 3462.554836]     pending: vmstat_update
> Does that mean that vmstat_update locks up or something that schedules it?

I think it means that vmstat_update didn't finish running (working).

> Also what workload triggers the BUG()?

Fuzzing with trinity inside a KVM guest. I've attached my config.


Thanks,
Sasha


Download attachment "config-sasha.gz" of type "application/gzip" (43528 bytes)