系统：CentOS?6.2?X86_64
内核：2.6.32-220.el6.x86_64
硬件：Dell?PowerEdge?R420
CPU：Intel(R)?Xeon(R)?CPU?E5-2420?0?@?1.90GHz
详细错误信息如下：
WARNING:?at?drivers/pci/intr_remapping.c:715?enable_intr_remapping+0×73/0x2af()?(Not?tainted)
Hardware?name:?PowerEdge?R420
Your?BIOS?has?requested?that?x2apic?be?disabled.
This?will?leave?your?machine?vulnerable?to?irq-injection?attacks.
Use?‘intremap=no_x2apic_optout’?to?override?BIOS?request.
解决：
因ROM默认情况下不使用x2apic
1.忽略
2.使用’intremap=no_x2apic_optout’?内核选项进行启动
如：
#?vim?/boot/grub/grub.conf
title?CentOS?(2.6.32-220.el6.x86_64)
root?(hd0,0)
kernel?/vmlinuz-2.6.32-220.el6.x86_64?ro?root=/dev/mapper/VolGroup00-LogVol00_root?rd_NO_LUKS?rd_LVM_LV=VolGroup00/LogVol01_swap?LANG=en_US.UTF-8?rd_NO_MD?quiet?SYSFONT=latarcyrheb-sun16?rhgb?crashkernel=auto?rd_LVM_LV=VolGroup00/LogVol00_root?KEYBOARDTYPE=pc?KEYTABLE=us?rd_NO_DM?intremap=no_x2apic_optout?#添加该参数，重启服务器解决
initrd?/initramfs-2.6.32-220.el6.x86_64.img
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