[PATCH] Documentation: add 'crashkernel=auto' entry into kernel-parameters.txt

[PATCH] Documentation: add 'crashkernel=auto' entry into kernel-parameters.txt

[Yaowei Bai]

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
+			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>
 
-- 
1.9.1

Re: [PATCH] Documentation: add 'crashkernel=auto' entry into kernel-parameters.txt

[Randy Dunlap]

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