Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fb391599f2eaf22197e3e914187c957ef7eeb4c5
Commit: fb391599f2eaf22197e3e914187c957ef7eeb4c5
Parent: 7d7712a385d5b0a6f921dbd9b66ad3aaed387b5e
Author: Bernhard Walle <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 18 23:41:02 2007 -0700
Committer: Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Oct 19 11:53:51 2007 -0700
Add documentation for extended crashkernel syntax
This adds the documentation for the extended crashkernel syntax into
Documentation/kdump/kdump.txt.
Signed-off-by: Bernhard Walle <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: "Luck, Tony" <[EMAIL PROTECTED]>
Cc: Paul Mackerras <[EMAIL PROTECTED]>
Cc: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
Cc: Paul Mundt <[EMAIL PROTECTED]>
Cc: Vivek Goyal <[EMAIL PROTECTED]>
Cc: "Eric W. Biederman" <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
Documentation/kdump/kdump.txt | 26 ++++++++++++++++++++++++++
Documentation/kernel-parameters.txt | 7 +++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 1b37b28..d0ac72c 100644
--- a/Documentation/kdump/kdump.txt
+++ b/Documentation/kdump/kdump.txt
@@ -231,6 +231,32 @@ Dump-capture kernel config options (Arch Dependent, ia64)
any space below the alignment point will be wasted.
+Extended crashkernel syntax
+===========================
+
+While the "[EMAIL PROTECTED]" syntax is sufficient for most
+configurations, sometimes it's handy to have the reserved memory dependent
+on the value of System RAM -- that's mostly for distributors that pre-setup
+the kernel command line to avoid a unbootable system after some memory has
+been removed from the machine.
+
+The syntax is:
+
+ crashkernel=<range1>:<size1>[,<range2>:<size2>,[EMAIL PROTECTED]
+ range=start-[end]
+
+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
+
+
Boot into System Kernel
=======================
diff --git a/Documentation/kernel-parameters.txt
b/Documentation/kernel-parameters.txt
index 189df0b..0a3fed4 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -497,6 +497,13 @@ and is between 256 and 4096 characters. It is defined in
the file
[KNL] Reserve a chunk of physical memory to
hold a kernel to switch to with kexec on panic.
+ crashkernel=range1:size1[,range2:size2,[EMAIL PROTECTED]
+ [KNL] Same as above, but depends on the memory
+ in the running system. The syntax of range is
+ start-[end] where start and end are both
+ a memory unit (amount[KMG]). See also
+ Documentation/kdump/kdump.txt for a example.
+
cs4232= [HW,OSS]
Format: <io>,<irq>,<dma>,<dma2>,<mpuio>,<mpuirq>
-
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