John W. Linville wrote:
On Wed, Aug 24, 2005 at 12:05:25PM -0300, Márcio Oliveira wrote:
I think the kernel is pointing to the wrong root partiotion. In a x86
box, I can change the kernel root partition in the boot loader (root=
parameter) or using the "rdev" command. In my case, the IBM Power
doesn't have a boot loader (yaboot was replaced by the kernel image) and
the powerpc64 system doesn't have the rdev command (from util-linux
package, the same package on x86 systems have the rdev command!).
I don't know anything that will do this on a pre-built kernel. But,
you should look at CONFIG_CMDLINE_BOOL and CONFIG_CMDLINE in your
kernel configuration. That will let you pre-configure the "root="
command line option.
Hi John,
The command rdev can change the default root partition on x86 linux
systems with pre-built kernels.
About the CONFIG_CMDLINE in the kernel configuration, I found it in lots
of files in the kernel source tree and I'd like to know which file I
need to change this value (/usr/src/linux/arch/ppc64/defconfig ?).
I don't know if ppc64 can use the zImage-style boot wrapper. If it
can, that would provide you with an option of modifying the command
line at boot time if needed.
According to this doc:
http://www-128.ibm.com/developerworks/eserver/library/es-SW_RAID_LINUX.html,
ppc64 can use zImage-style boot wrapper, so I'm trying it.
Good luck!
John
Thanks John!
Márcio.
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