Re: [2.6.33-rc5] Weird deadlock when shutting down

[Johannes Berg]

On Mon, 2010-02-22 at 17:12 +0800, AmÃrico Wang wrote:

> Since it hangs in put_cpu() which is just preempt_enable(), so I began
> to suspect if we need a synchronize_sched(), or some barrier perhaps.
> I am not sure at all.

Right.

> Before other experts look at this, I think doing a bisect would be
> very useful.

I was afraid you'd say that, it'll take forever though since I need to
walk over to it after every shutdown, see if it turned off and then turn
it on again (and possibly off).... I guess I'll get started on that.

johannes

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