linux-kernel - Re: kernel: smp: WARNING at kernel/smp.c:673

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Message-ID: <20140804152251.GF26230@htj.dyndns.org>
Date:	Mon, 4 Aug 2014 11:22:51 -0400
From:	Tejun Heo <htejun@...il.com>
To:	Christoph Lameter <cl@...two.org>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>, Matt Mackall <mpm@...enic.com>,
	Gilad Ben-Yossef <gilad@...yossef.com>,
	Jens Axboe <axboe@...com>, Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: kernel: smp: WARNING at kernel/smp.c:673

On Mon, Aug 04, 2014 at 10:21:47AM -0500, Christoph Lameter wrote:
> On Mon, 4 Aug 2014, Tejun Heo wrote:
> 
> > On Mon, Aug 04, 2014 at 10:00:39AM -0500, Christoph Lameter wrote:
> > > On Sun, 3 Aug 2014, Sasha Levin wrote:
> > >
> > > > While fuzzing with trinity inside a KVM tools guest running the latest -next
> > > > kernel, I've stumbled on the following spew:
> > >
> > > Hmmm... Is this the new cpuset code that calling kmem_cache_shrink from
> > > the cpu notifier?
> >
> > Hah?  I don't see anything cpuset related there.
> 
> Yuck. I meant cgroup code. There were some patches that were suggesting a
> shrink operation when taking down a cgroup. Does that also apply to per
> cpu downing?

Heh, I have no idea what you're talking about.  cgroup currently
doesn't do anything like that.  It doesn't even make use of the cpu
hotplug hooks.

Thanks.

-- 
tejun
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