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

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Message-ID: <SNT125-W2213C38FBE28FE6BEEC54CC3420@phx.gbl>
Date:	Mon, 22 Feb 2010 22:28:54 -0800
From:	Yuhong Bao <yuhongbao_386@...mail.com>
To:	<hancockrwd@...il.com>, <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>,
	<linux-usb-devel@...ts.sourceforge.net>
Subject: RE: [PATCH 2.6.34] ehci-hcd: add option to enable 64-bit DMA support

> Add a module parameter to allow the user to enable 64-bit DMA support in EHCI,
> which has been forcibly disabled since 2003 - see:
>
> http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg17230.html
>
> At that time the comment was "it'd only matter on a few big Intel boxes anyway",

That months *after* AMD released the Opteron and Athlon 64 processors with x86_64 support, with an x86_64 version of Linux.

Yuhong Bao

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