From: Christoph Lameter <cl@linux.com>
To: Sasha Levin <sasha.levin@oracle.com>
Cc: Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
"davej @gmail-imap.l.google.com>> Dave Jones" <davej@redhat.com>
Subject: Re: mm: slub: circular dependency between slab_mutex and cpu_hotplug
Date: Thu, 28 Aug 2014 10:31:26 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.11.1408281030510.6401@gentwo.org> (raw)
In-Reply-To: <53FF4280.1040402@oracle.com>
On Thu, 28 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:
This looks to me more to be a cpu hotplug issue.
>
> [ 7841.323177] Possible unsafe locking scenario:
> [ 7841.323177]
> [ 7841.323177] CPU0 CPU1
> [ 7841.323177] ---- ----
> [ 7841.323177] lock(cpu_hotplug.lock#2);
> [ 7841.323177] lock((oom_notify_list).rwsem);
> [ 7841.323177] lock(cpu_hotplug.lock#2);
> [ 7841.323177] lock(slab_mutex);
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prev parent reply other threads:[~2014-08-28 15:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-28 14:53 Sasha Levin
2014-08-28 15:31 ` Christoph Lameter [this message]
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