Messages in this thread | | | Date | Thu, 28 Nov 2013 19:11:17 +0530 | Subject | Re: [PATCH V2] cpufreq: Make sure CPU is running on a freq from freq-table | From | Viresh Kumar <> |
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On 28 November 2013 18:39, Rafael J. Wysocki <rjw@rjwysocki.net> wrote: > acpi-cpufreq is one at least. > > Anyway, this isn't about ACPI or anything like that, but hardware. Generally > speaking, on modern Intel hardware the processor itself chooses the frequency > to run at and it may do that behind your back. Moreover, it can choose a > frequency different from the one you asked for. And it won't choose one that > it can't run at for that matter. :-) > > Overall, I don't believe that the problem you're trying to address is relevant > for any non-exotic x86 hardware.
Okay.. So wouldn't it be better that we add this special flag only when we face a real problem? Otherwise this flag might stay unused for long time and then we might end up removing it..
>> > So there should be a flag for >> > drivers indicating whether or not frequencies (or operation points in >> > general) are directly testable and the check should only be done for >> > the drivers with the flag set. >> >> Probably a flag with properties exactly opposite to what you mentioned, >> so that we don't need to modify most of the drivers.. > > That would work too if you prefer it.
In case we need this flag, what should we name it? ALLOW_UNKNOWN_FREQ ??
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