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Subject: Re: [PATCH] Documentation: add 'crashkernel=auto' entry into
 kernel-parameters.txt
To: Yaowei Bai <bywxiaobai@163.com>, corbet@lwn.net
References: <1440226279-8283-1-git-send-email-bywxiaobai@163.com>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
From: Randy Dunlap <rdunlap@infradead.org>
Message-ID: <55D8B7ED.90600@infradead.org>
Date: Sat, 22 Aug 2015 10:57:01 -0700
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On 08/21/15 23:51, Yaowei Bai wrote:
> There is no 'crashkernel=auto' entry in kernel-parameters.txt, borrow it
> from kexec-kdump-howto.txt file in the kexec-tools-2.0.0 package.
> 
> Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
> ---
>  Documentation/kernel-parameters.txt | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 1d6f045..4da77fa 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -797,6 +797,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
>  			It will be ignored when crashkernel=X,high is not used
>  			or memory reserved is below 4G.
>  
> +	crashkernel=auto
> +			This specification allows the kernel to decide how much
> +			meory to reserve for the purposes of kdump. It will make

			memory

> +			this determination based on the amount of memory you have
> +			in your system, and scale the allocation accordingly.
> +			Note that if you have less than 4Gb of memory in your system,
> +			this specification will opt to not allocate any memory for
> +			the purposes of kdump.
> +
>  	cs89x0_dma=	[HW,NET]
>  			Format: <dma>
>  
> 


-- 
~Randy
--
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