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

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Message-ID: <20160120152015.GI14187@dhcp22.suse.cz>
Date:	Wed, 20 Jan 2016 16:20:16 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: mm, vmstat: kernel BUG at mm/vmstat.c:1408!

On Wed 20-01-16 09:14:06, Christoph Lameter wrote:
> On Wed, 20 Jan 2016, Michal Hocko wrote:
> 
> > [CCing Andrew]
> >
> > I am just reading through this old discussion again because "vmstat:
> > make vmstat_updater deferrable again and shut down on idle" which seems
> > to be the culprit AFAIU has been merged as 0eb77e988032 and I do not see
> > any follow up fix merged to linus tree
> 
> Is there any way to reproce this issue? This is running through trinity
> right? Can we please get the exact syscall that causes this to occur?

As per the backtrace in the initial report this seems to be time
dependent as the crash happens from _kthread_ context. So it doesn't
seem to be directly related to any particular syscall.
-- 
Michal Hocko
SUSE Labs