linux-kernel - Re: [PATCH try2] panic: setup panic

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Date:	Mon, 11 Nov 2013 15:16:40 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Felipe Contreras <felipe.contreras@...il.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH try2] panic: setup panic_timeout early


* Felipe Contreras <felipe.contreras@...il.com> wrote:

> Otherwise we might not reboot when the user needs it the most (early
> on).
> 
> Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
> ---
> 
> This is exactly the same as in the previous try, but now alone since it was
> mudded by largely irrelevant patches in the series.
> 
>  kernel/panic.c | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/kernel/panic.c b/kernel/panic.c
> index b6c482c..46e37ff 100644
> --- a/kernel/panic.c
> +++ b/kernel/panic.c
> @@ -468,9 +468,21 @@ EXPORT_SYMBOL(__stack_chk_fail);
>  
>  #endif
>  
> -core_param(panic, panic_timeout, int, 0644);
>  core_param(pause_on_oops, pause_on_oops, int, 0644);
>  
> +static int __init set_panic_timeout(char *str)
> +{
> +	int timeout;
> +
> +	if (!get_option(&str, &timeout))
> +		return -EINVAL;
> +
> +	panic_timeout = timeout;
> +	return 0;
> +}
> +
> +early_param("panic_timeout", set_panic_timeout);
> +

This still has the problem I pointed out for your v1 patch: for simple 
integer parameters simple_strtol() is better and (a tiny bit) faster.

Thanks,

	Ingo
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