[PATCH v2 -next] Documentation: Improve crashkernel= description
vgoyal at redhat.com
Mon Feb 7 09:25:50 EST 2011
On Mon, Feb 07, 2011 at 01:30:54PM +0200, Ahmed S. Darwish wrote:
> Had to explore two C code files to make sense of the 'crashkernel='
> kernel parameter values. Improve the situation.
Did you look at Documentation/kdump/kdump.txt before looking into the
code. I thought kdump.txt explained the meaning of crashkernel= well.
In case if it was not obivious that for further details look into
kdump.txt, I will suggest to add a line asking reader to look into
kdump.txt for more details.
Tough crashkernel= range1:size1[,range2:size2,...][@offset], description
in next line already mentions kdump.txt
This patch looks good to me as it is though.
Acked-by: Vivek Goyal <vgoyal at redhat.com>
> Signed-off-by: Ahmed S. Darwish <darwish.07 at gmail.com>
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 89835a4..5ad9980 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -545,9 +545,12 @@ and is between 256 and 4096 characters. It is defined in the file
> - crashkernel=nn[KMG]@ss[KMG]
> - [KNL] Reserve a chunk of physical memory to
> - hold a kernel to switch to with kexec on panic.
> + crashkernel=size[KMG][@offset[KMG]]
> + [KNL] Using kexec, Linux can switch to a 'crash kernel'
> + upon panic. This parameter reserves the physical
> + memory region [offset, offset + size] for that kernel
> + image. If '@offset' is omitted, then a suitable offset
> + is selected automatically.
> [KNL] Same as above, but depends on the memory
More information about the kexec