http://bugzilla.kernel.org/show_bug.cgi?id=8950
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |REJECTED
Resolution| |WILL_NOT_FIX
------- Comment #12 from [EMAIL PROTECTED] 2007-11-18 18:27 -------
The problem in thi bug is that /proc/cpuinfo reports wrong frequency.
The flowchart of /proc/cpuinfo is listed the following:
a. Before the cpufreq module is loaed, the /proc/cpuinfo will use the cpu_khz
to display the cpu frequency. And cpu_khz is obtained using TSC calculation in
the initialization of OS.
b. After the cpufreq module is loaded, the /proc/cpuinfo will display the
cpu frequency obtained from the P-states table.
The P-states table in this system is uncorrect.
Package (0x06)
{
0x0000AE45, // 44613 MHz
0x000157C0,
0x0000000A, // latency = 10usec -- consistent with MSR
0x0000000A,
0x00000923, // ctl
0x00000923
},
Package (0x06)
{
0x0000742E, // 29742 MHz
0x0000F230,
0x0000000A, -- latency = 10usec -- consistent with MSR
0x0000000A,
0x0000061B, // ctl
0x0000061B
}
So the /proc/cpuinfo will report the wrong cpu frequency after the cpufreq
module is loaded.
It is appropriate to fix this problem by BIOS update.
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