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SubjectRe: [PATCH] x86/dma-mapping: override via_no_dac for new VIA PCI bridges
On Mon, Apr 16, 2018 at 05:26:56PM +0800, David Wang wrote:
> PCI bridges integrated in new VIA chipset/SoC have no DAC issue.
> Enable DAC for the platforms with these chipset/SoC can improve DMA performance about
> 20% when DRAM size > 4GB.
>

So we get an exception to an exception? Is there any way to figure
out the PCI IDs actually affected?

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