Linux kernel: Uhhuh. NMI received for unknown reason 30

centos linux报错：

Message from syslogd@localhost at Mar  2 15:54:57 ...
kernel:Uhhuh. NMI received for unknown reason 00 on CPU 33.

Message from syslogd@localhost at Mar  2 15:54:57 ...
kernel:Do you have a strange power saving mode enabled?

Message from syslogd@localhost at Mar  2 15:54:57 ...
kernel:Dazed and confused, but trying to continue

How do I fix this error? （怎么解决这个问题）
A. This is caused when the system is hanging under load. Add any one of the following to you /boot/grub.conf file（一般有2种方法，如下；都是通过修改/boot/grub.conf 文件）:

1. Disable the NMI watchdog by adding “nmi_watchdog=0”
2. Disable the high precision event timer (HPET) by adding “nohpet”

Open grub.conf, type:

vi ／boot/grub.conf #我的路径其实是 /boot/grub/grub.conf

Make modification to kernel line as follows:

title Red Hat Enterprise Linux AS (2.6.9-78.0.8.EL)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-78.0.8.EL ro nohpet root=/dev/VolGroup00/LogVol00 nohpet
        initrd /initrd-2.6.9-78.0.8.EL.img

Save and close the file. Reboot the server（重启服务器）:

reboot

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