[patch 7/7] Add documentation for extended crashkernel syntax

Pavel Machek pavel at ucw.cz
Tue Sep 18 13:21:08 EDT 2007


> This adds the documentation for the extended crashkernel syntax into
> Documentation/kdump/kdump.txt.

Should you also update kernel-parameters.txt?

> +For example:
> +
> +    crashkernel=512M-2G:64M,2G-:128M
> +
> +This would mean:
> +
> +    1) if the RAM is smaller than 512M, then don't reserve anything
> +       (this is the "rescue" case)
> +    2) if the RAM size is between 512M and 2G, then reserve 64M
> +    3) if the RAM size is larger than 2G, then reserve 128M

Why is this useful? I mean... if 64M is enough to save a dump, why use
128M? ...or does the required size somehow scale with memory in
machine? (pagetables?)

(english) http://www.livejournal.com/~pavelmachek
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