Ack. Let's just do this. Ingo?
Linus
On Wed, Jul 13, 2011 at 1:44 PM, Len Brown <lenb@xxxxxxxxxx> wrote:
>
>> So how about informing users, how about making it non-silent? An informative
>> printk that also mentions the power configuration tool, etc. This solves the
>> concerns i mentioned.
>
> Something like this?
>
> rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
> if ((epb & 0xF) == 0) {
> printk_once(KERN_WARN, "x86: updated energy_perf_bias"
> " to 'normal' from 'performance'\n"
> "You can view and update epb via utility,"
> " such as x86_energy_perf_policy(8)\n");
> epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
> wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
> }
>
>
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