My hardware is:
CPU: Intel(R) Atom(TM) CPU E3845 @ 1.91GHz
and it supports EIST(Enhanced Intel SpeedStep Technology).
OS: RHEL 7(kernel-3.10)
When I set the BIOS options "CPU configuration >> EIST" to "enable", it appears a kernel panic when the system is starting up. Here is what I am seeing:
......
Fast TSC calibration failed.
[Hardware Error] CPU 3: Machine Check Exception: 4 Bank 0: 9000000020000003
......
Machine check: Invalid.
Panic - not syncing. Fatal machine check on current CPU.
Rebooting in 30 seconds.
By reading the Intel-programming-manual, the MCE means:
Machine Check Exception: 4 -- MCG_STATUS_MCIP
Bank 0: 9000000020000003 --
0x9000 -- 1001 0000 0000 0000 -- IA32_MCi_Status MSR register
0x0003 -- 0000 0000 0000 0011 -- External Error, The BINIT# from another processor caused this processor to enter machine check.
and seems it is an external bus error.
If I DISABLED the BIOS option "EIST", there will be no error or panic.
If I change to CentOS 6.5/6.6(kernel 2.6), there will be no error or panic even when "EIST" is ON.
So, it should be a bug in kernel source of RHLR 7/CentOS 7(kernel-3.10).
Ps: kernel source v3.10 from kernel.org is OK
Any help would be greatly appreciated.
Thanks.
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