Re: [PATCH] notifier: Fix soft lockup for notifier_call_chain().

[Cong Wang]

On Fri, Jun 24, 2016 at 7:46 PM, Ding Tianhong <dingtianhong@xxxxxxxxxx> wrote:
> diff --git a/kernel/notifier.c b/kernel/notifier.c
> index fd2c9ac..9c30411 100644
> --- a/kernel/notifier.c
> +++ b/kernel/notifier.c
> @@ -92,6 +92,8 @@ static int notifier_call_chain(struct notifier_block **nl,
>  #endif
>                 ret = nb->notifier_call(nb, val, v);
>
> +               cond_resched();
> +
>                 if (nr_calls)
>                         (*nr_calls)++;

NAK.

You can't do a resched in atomic context in __atomic_notifier_call_chain().