>-----Original Message-----
>From: Li, Shaohua
>Sent: Monday, April 02, 2007 6:34 PM
>To: Pallipadi, Venkatesh
>Cc: linux acpi; Brown, Len; Adam Belay
>Subject: RE: [PATCH] acpi cpuidle driver should handle max_cstate
>
>On Tue, 2007-04-03 at 00:44 +0800, Pallipadi, Venkatesh wrote:
>>
>Ok, updated it.
>
>Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
>
>Index: linux/drivers/acpi/processor_idle.c
>===================================================================
>--- linux.orig/drivers/acpi/processor_idle.c 2007-04-03
>08:47:05.000000000 +0800
>+++ linux/drivers/acpi/processor_idle.c 2007-04-03
>08:50:50.000000000 +0800
>@@ -75,7 +75,30 @@ ACPI_MODULE_NAME("processor_idle");
> #define C2_OVERHEAD 1 /* 1us */
> #define C3_OVERHEAD 1 /* 1us */
>
>-module_param(max_cstate, uint, 0644);
>+void acpi_max_cstate_changed(void)
>+{
>+ int cpu;
>+ /* Driver will reset devices' max cstate limit */
>+ lock_cpu_hotplug();
>+ for_each_online_cpu(cpu)
>+ cpuidle_force_redetect(&per_cpu(cpuidle_devices, cpu));
>+ unlock_cpu_hotplug();
>+}
No hotplug lock in cpuidle please. Either we have to add a
force_allcpu_redetect function or we can use the previous patch.
Thanks,
Venki
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