microcode: CPU0 update to revision 0x6b failed.
红帽的bug反馈信息
https://bugzilla.redhat.com/show_bug.cgi?id=860929
另一个RHEL重编译版本Oracle Linux也将此报错归为Bug
When running Oracle Linux 6 with UEK R3, you might see error messages in dmesg or /var/log/messages similar to this one:
microcode: CPU0 update to revision 0x6b failed.
You can ignore this warning. You do not need to upgrade the microcode for virtual CPUs as presented to the guest. (Bug ID 12576264, 13782843)
这个问题在虚拟化环境中出现,两方都认为可以忽略它,因为虚拟化环境中没有更新微码的必要。
因此,解决方法是,
yum remove microcode_ctl
你不理会它这个错误提示也是可以的。。。