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Date: Tue, 25 Oct 2011 15:35:17 +1100
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Subject: Re: [gentoo-user] Re: [OT] Disappointing USB3 performance
From: Adam Carter <adamcarter3@gmail.com>
To: gentoo-user@lists.gentoo.org
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USB does use DMA. Check the kernel source doco Documentation/usb/dma.txt