Installation guide

Release Notes

9.6. ia64 Architecture

• Some Itanium systems cannot properly produce console output from the kexec purgatory code.

This code contains instructions for backing up the first 640k of memory after a crash.

While purgatory console output can be useful in diagnosing problems, it is not needed for

kdump to properly function. As such, if your Itanium system resets during a kdump operation,

disable console output in purgatory by adding --noio to the KEXEC_ARGS variable in /etc/

sysconfig/kdump.

• Running perftest will fail if different CPU speeds are detected. As such, you should disable CPU

speed scaling before running perftest.

• When the kdump kernel is booted, the following error will appear in the boot log:

mknod: /tmp/initrd.[numbers]/dev/efirtc: No such file or directory

This error results from a malformed request to create the efirtc in an incorrect path. However,

the device path in question is also created statically in the initramfs when the kdump service is

started. As such, the run-time creation of the device node is redundant, harmless, and should not

affect the performance of kdump.

• Some systems may be unable to boot the kdump kernel properly. In such cases, use the

machvec=dig kernel parameter.

• Recording needs to be manually enabled on Dell M4300 and M6300. To do this, perform the

following steps:

1. Open alsamixer.

2. Press Tab to toggle [Capture] in the View field (located at the upper left part of the menu).

3. Press the Space bar.

4. To verify that recording is enabled, the text above the ADCMux field should display L R

CAPTUR.

• On Intel Itanium-based systems running SELinux in enforcing mode, either the

allow_unconfined_execmem_dyntrans or allow_execmem Booleans must be turned

on to allow the IA-32 Execution Layer (the ia32el service) to operate correctly. If the

allow_unconfined_execmem_dyntrans Boolean is off, but the allow_execmem Boolean is

on, which it is by default in Red Hat Enterprise Linux 5, the ia32el service supports 32-bit emulation;

however, if both Booleans are off, emulation fails.

10. Added Packages

cmirror-1.1.36-1.el5

• Group: System Environment/Base

• Summary: cmirror - The Cluster Mirror Package

• Description: