Re: mm: slub: circular dependency between slab_mutex and cpu_hotplug

[Christoph Lameter]

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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