How to understand "high" or "low" in crashkernel configuration?

[Dave Young]

On 11/18/15 at 10:45pm, Nan Xiao wrote:
> Hi all,
> 
> When I use SuSE default Kdump configuration, I find there is "high" or "low" in
> crashkernel's value, and it likes this:
> 
>     crashkernel=xxM,high Or crashkernel=xxM,low
> 
> But from this document(https://www.kernel.org/doc/Documentation/kdump/kdump.txt),
> I can't find explanation of "high" or "low". How to understand it?

You can find it in Documentation/kernel-parameters.txt


> 
> Thanks very much in advance!
> 
> Best Regards
> Nan Xiao
> 
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