Re: [PATCH v2] Fix lockup related to stop_machine being stuck in__do_softirq.

[Eric Dumazet]

On Thu, 2013-06-06 at 09:10 -0700, greearb@xxxxxxxxxxxxxxx wrote:
> From: Ben Greear <greearb@xxxxxxxxxxxxxxx>
> 
> The stop machine logic can lock up if all but one of
> the migration threads make it through the disable-irq
> step and the one remaining thread gets stuck in
> __do_softirq.  The reason __do_softirq can hang is
> that it has a bail-out based on jiffies timeout, but
> in the lockup case, jiffies itself is not incremented.
...
> Signed-off-by: Ben Greear <greearb@xxxxxxxxxxxxxxx>
> ---
> 
> v2:  Fix comments and reformat conditional per suggestions.
> 

Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx>

Thanks !


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