Anyone know how to fix this: Memory for crashkernel is not reserved

abefroman · 02-27-2013, 09:44 PM

Anyone know how to fix this:

Code:

 Memory for crashkernel is not reserved
 Please reserve memory by passing "crashkernel=X@Y" parameter to the kernel
 Then try loading kdump kernel

In grub.conf I tried both
crashkernel=auto
and
crashkernel=128M@16M

TIA

unSpawn · 02-28-2013, 05:40 AM

Would this help: http://www.kernel.org/doc/Documentation/kdump/kdump.txt ?

abefroman · 02-28-2013, 07:27 AM

Didn't help, but I think its something related to the kernel config, since the RPM kernel doesn't give that error.

I changed 128M@16M to just 128M per that link, and it then gave the message:

Code:

cat: /sys/kernel/kexec_crash_size: No such file or directory
/etc/rc3.d/S20kdump: line 263: [: -eq: unary operator expected
dc: stack empty

I'm assuming the unary operator is the @

And I verified I have the other options in the link set to Y:

Code:

  CONFIG_SYSFS=y
CONFIG_RELOCATABLE=y

Any ideas on what in the config it could be?

unSpawn · 02-28-2013, 08:09 AM

Quote:

Originally Posted by abefroman

Code:

cat: /sys/kernel/kexec_crash_size: No such file or directory

If it's missing either the key location changed or you're missing something kexec(-related). Check your deps first I'd say.

abefroman · 02-28-2013, 09:22 AM

I installed kernel 3.2.39 and that error went away.