https://bugzilla.kernel.org/show_bug.cgi?id=24562
Summary: k8-powernow does not see all cores
Product: ACPI
Version: 2.5
Kernel Version: 2.6.36.1
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Processors
AssignedTo: acpi_config-process...@kernel-bugs.osdl.org
ReportedBy: thoralf.dass...@gmail.com
Regression: No
During boot, I get this summary on my AMD 890FX/SB850 chipset:
SMP: Allowing 6 CPUs, 0 hotplug CPUs
setup_percpu: NR_CPUS:4096 nr_cpumask_bits:6 nr_cpu_ids:6 nr_node_ids:1
PERCPU: Embedded 27 pages/cpu @ffff880006000000 s80704 r8192 d21696 u262144
pcpu-alloc: s80704 r8192 d21696 u262144 alloc=1*2097152
pcpu-alloc: [0] 0 1 2 3 4 5 - -
SLUB: Genslabs=13, HWalign=64, Order=0-3, MinObjects=0, CPUs=6, Nodes=1
RCU-based detection of stalled CPUs is disabled.
Verbose stalled-CPUs detection is disabled.
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
mce: CPU supports 6 MCE banks
CPU0: AMD Phenom(tm) II X6 1090T Processor stepping 00
Switch to broadcast mode on CPU1
Switch to broadcast mode on CPU2
Switch to broadcast mode on CPU3
Switch to broadcast mode on CPU4
Brought up 6 CPUs
Switch to broadcast mode on CPU5
Switch to broadcast mode on CPU0
And a bit further down cores 4 and 5 are not seen by "powernow-k8":
powernow-k8: Found 1 AMD Phenom(tm) II X6 1090T Processor (6 cpu cores)
(version 2.20.00)
powernow-k8: Core Performance Boosting: on.
powernow-k8: 0 : pstate 0 (3200 MHz)
powernow-k8: 1 : pstate 1 (2400 MHz)
powernow-k8: 2 : pstate 2 (1600 MHz)
powernow-k8: 3 : pstate 3 (800 MHz)
Frequency scaling does work on all 6 cores once the system is up and running.
-----------------------------
Finally, should this: "AMD Opteron/Athlon64 PowerNow!" under CPU Frequency
scaling inside the kernel be called something else to accommodate the K10
(Phenom) line?
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