Re: [PATCH 2.6.34] ehci-hcd: add option to enable 64-bit DMA support

From: Tejun Heo
Date: Thu Feb 25 2010 - 00:15:44 EST


On 02/25/2010 01:03 PM, Oliver Neukum wrote:
> Am Donnerstag, 25. Februar 2010 04:29:12 schrieb Tejun Heo:
>> Arghhh.... I hate when intel pulls this type of 'product
>> differentiation' stunts. At any rate, I'm doubtful swiotlb'ing for
>> usb2.0 would be noticeable at all.
>
> That can and should be tested.

Robert did already. Given that USB2.0 devices aren't usually used for
high-perf storage subsystem, the benefit looks marginal to me but
everyone is entitled to own opinion.

Thanks.

Thanks.

--
tejun
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