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Date: Thu, 06 Jun 2013 09:14:12 -0700
From: Eric Dumazet <eric.dumazet@...il.com>
To: greearb@...delatech.com
Cc: linux-kernel@...r.kernel.org, tj@...nel.org
Subject: Re: [PATCH v2] Fix lockup related to stop_machine being stuck in
__do_softirq.
On Thu, 2013-06-06 at 09:10 -0700, greearb@...delatech.com wrote:
> From: Ben Greear <greearb@...delatech.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@...delatech.com>
> ---
>
> v2: Fix comments and reformat conditional per suggestions.
>
Acked-by: Eric Dumazet <edumazet@...gle.com>
Thanks !
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