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[PATCH] Kdump: Documentation Update

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There are minor changes in command line options in kexec-tools for kdump.
This patch updates the documentation to reflect those changes.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Vivek Goyal 2005-09-09 13:10:19 -07:00 committed by Linus Torvalds
parent 9d01a82e46
commit 952b649272
1 changed files with 8 additions and 8 deletions
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16
Documentation/kdump/kdump.txt
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@ -39,8 +39,7 @@ SETUP
and apply http://lse.sourceforge.net/kdump/patches/kexec-tools-1.101-kdump.patch
and after that build the source.
2) Download and build the appropriate (latest) kexec/kdump (-mm) kernel
patchset and apply it to the vanilla kernel tree.
2) Download and build the appropriate (2.6.13-rc1 onwards) vanilla kernel.
Two kernels need to be built in order to get this feature working.
@ -84,15 +83,16 @@ SETUP
4) Load the second kernel to be booted using:
kexec -p <second-kernel> --crash-dump --args-linux --append="root=<root-dev>
init 1 irqpoll"
kexec -p <second-kernel> --args-linux --elf32-core-headers
--append="root=<root-dev> init 1 irqpoll"
Note: i) <second-kernel> has to be a vmlinux image. bzImage will not work,
as of now.
ii) By default ELF headers are stored in ELF32 format (for i386). This
is sufficient to represent the physical memory up to 4GB. To store
headers in ELF64 format, specifiy "--elf64-core-headers" on the
kexec command line additionally.
ii) By default ELF headers are stored in ELF64 format. Option
--elf32-core-headers forces generation of ELF32 headers. gdb can
not open ELF64 headers on 32 bit systems. So creating ELF32
headers can come handy for users who have got non-PAE systems and
hence have memory less than 4GB.
iii) Specify "irqpoll" as command line parameter. This reduces driver
initialization failures in second kernel due to shared interrupts.