Re: [PATCH v3] Optimize C3 entry on Centaur CPUs

[Pavel Machek]

On Thu 2018-12-27 16:41:50, David Wang wrote:
> For new Centaur CPUs the ucode will take care of the preservation of cache coherence
> between CPU cores in C-states regardless of how deep the C-states are. So, it is not
> necessary to flush the caches in software befor entering C3. And this useless operation
> will cause performance drop for the cores which share some caches with the idling core.  
> 
> Signed-off-by: David Wang <davidwang@xxxxxxxxxxx>
> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

Acked-by: Pavel Machek <pavel@xxxxxx>

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