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SubjectRe: [PATCH v2] Fix lockup related to stop_machine being stuck in __do_softirq.
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On Thu, 2013-06-06 at 09:10 -0700, greearb@candelatech.com wrote:
> From: Ben Greear <greearb@candelatech.com>
>
> 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@candelatech.com>
> ---
>
> v2: Fix comments and reformat conditional per suggestions.
>

Acked-by: Eric Dumazet <edumazet@google.com>

Thanks !




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