On Sun, 8 Jul 2012 19:50:54 +0100, Jason Vas Dias <jason.vas.d...@gmail.com>
wrote:
> This patch adds a new acpi.thermal.temp_b4_trip = 1 settting, which
> causes the temperature
> to be set before evaluation of thermal trip points (the old default) ;
> this mode should
> be selected automatically by DMI match if the system identifies as "HP
> Compaq 6715b" .
>
> Please consider applying a patch like that attached to fix the issue reported
> in lkml thread "Re: PROBLEM: Performance drop" recently, whereby
> it was found that HP 6715b laptops ( which have 2.2Ghz dual-core AMD
> x86_64 k8 CPUs)
> get stuck running the CPU at 800Khz and cannot switch frequency. I have
> verified
> that this still the case with v3.4.4 tagged "stable" kernel.
>
> diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
> index 7dbebea..de2b164 100644
> --- a/drivers/acpi/thermal.c
> +++ b/drivers/acpi/thermal.c
> @@ -96,6 +96,10 @@ static int psv;
> module_param(psv, int, 0644);
> MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
>
> +static int temp_b4_trip;
> +module_param(temp_b4_trip, int, 0);
> +MODULE_PARM_DESC(temp_b4_trip, "Get the temperature before
> initializing trip points.");
> +
Hi Jason,
Two points: this is a bool, why not make it one? I know, the
rest of the code is old-school, but this is a new parameter. Also, why
not 0644 so it can be read and set at runtime?
Cheers,
Rusty.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
