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Subject[PATCH v2 -next] Documentation: Improve crashkernel= description

Had to explore two C code files to make sense of the 'crashkernel='
kernel parameter values. Improve the situation.

Signed-off-by: Ahmed S. Darwish <darwish.07@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
Format:
<first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]

- 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.

crashkernel=range1:size1[,range2:size2,...][@offset]
[KNL] Same as above, but depends on the memory
--
Darwish
http://darwish.07.googlepages.com


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