HP 3PAR Ubuntu Operating System Implementation Guide

SUPPORT COMMUNICATION - CUSTOMER ADVISORY

Document ID: c03241282

Version: 2

Advisory: (Revision) Red Hat Enterprise Linux 6.2 and SUSE Linux Enterprise Server 11

SP2

- Linux Kernel May Be Tainted on HP ProLiant Servers Configured With an Intel Xeon

E5-2600-Series Processor

RESOLUTION

HP will enable x2apic on select future platforms.

The workaround listed below must be used in cases where x2apic support is not available.

As a workaround, to avoid the tainted kernel, enable the x2apic by adding the following

kernel parameter:

intremap=no_x2apic_optout

Workaround

Add kernel parameter intremap=no_x2apic_optout:

/etc/default/grub

# If you change this file, run 'update-grub' afterwards to update

# /boot/grub/grub.cfg.

# For full documentation of the options in this file, see:

# info -f grub -n 'Simple configuration'

GRUB_TIMEOUT=10

#`GRUB_TIMEOUT'

# Boot the default entry this many seconds after the menu is

# displayed, unless a key is pressed. The default is `5'. Set to

# `0' to boot immediately without displaying the menu, or to `-1' to

# wait indefinitely.

GRUB_CMDLINE_LINUX_DEFAULT="intremap=no_x2apic_optout“

#`GRUB_CMDLINE_LINUX'

# Command-line arguments to add to menu entries for the Linux kernel.

#`GRUB_CMDLINE_LINUX_DEFAULT'

# Unless `GRUB_DISABLE_RECOVERY' is set to `true', two menu entries

# will be generated for each Linux kernel: one default entry and one

# entry for recovery mode. This option lists command-line arguments

# to add only to the default menu entry, after those listed in