New: cpufreq P-state tables can change during runtime, handle it
http://bugzilla.kernel.org/show_bug.cgi?id=10194
Summary: cpufreq P-state tables can change during runtime, handle
it
Product: Power Management
Version: 2.5
KernelVersion: 2.6.25-rc4
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: cpufreq
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
ACPI now allows a BIOS to change the P-state tables during runtime. This can happen as the result of a power cord being plugged in or out, of a thermal alarm of some sort which BIOS catches, of a "green" power savings mode set in BIOS, or possibly other situations.
When BIOS wants to change the tables, it issues an SCI.
acpi-cpufreq does not presently have a way to catch that SCI. It does not re-read the P-state tables. And it does not inform userspace that the values have changed.
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[Bug 10194] cpufreq P-state tables can change during runtime, handle it
http://bugzilla.kernel.org/show_bug.cgi?id=10194
[email protected] changed:
What |Removed |Added
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CC|[email protected] |[email protected]
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[Bug 10194] cpufreq P-state tables can change during runtime, handle it
In reply to [email protected]http://bugzilla.kernel.org/show_bug.cgi?id=10194
[email protected] changed:
What |Removed |Added
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Status|NEW |REJECTED
Resolution| |DOCUMENTED------- Comment #1 from [email protected] 2008-04-09 16:20 ------- this functionality is present already, I just didn't know where to find it. acpi_processor_ppc_has_changed() is it. Closing.
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