Re: hdparm -t yields incorrect timings when Intel hyperthreading is enabled

[Paul Ausbeck <paula@soe.ucsc.edu>]

While examining the kernel log for another reason, I came across 
evidence that acpi_idle, and not intel_idle, is being used on my 
dn2800mt system, see below. In fact, it seems that intel_idle cannot be 
used. Is there some sort of binary blob involved here?

-----------------------------------------------------------demsg | grep 
idle------------------------------------------------------------------------------

[    0.000000]  RCU dyntick-idle grace-period acceleration is enabled.
[    0.197859] cpuidle: using governor ladder
[    0.197869] cpuidle: using governor menu
[    1.707710] intel_idle: does not run on family 6 model 54
[    5.118568] ACPI: acpi_idle registered with cpuidle