linux-kernel - RE: [PATCH] I/OAT: Add support for version 2 of ioatdma device

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Message-ID: <BAE9DCEF64577A439B3A37F36F9B691C0349A5C8@orsmsx418.amr.corp.intel.com>
Date:	Tue, 23 Oct 2007 18:18:54 -0700
From:	"Nelson, Shannon" <shannon.nelson@...el.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	<linux-kernel@...r.kernel.org>,
	"Williams, Dan J" <dan.j.williams@...el.com>
Subject: RE: [PATCH] I/OAT: Add support for version 2 of ioatdma device

>From: Andrew Morton [mailto:akpm@...ux-foundation.org] 
>On Fri, 19 Oct 2007 00:20:25 -0700
>Shannon Nelson <shannon.nelson@...el.com> wrote:
>
>> Add support for version 2 of the ioatdma device.  This device handles
>> the descriptor chain and DCA services slightly differently:
>>  - Instead of moving the dma descriptors between a busy and 
>an idle chain,
>>    this new version uses a single circular chain so that we 
>don't have
>>    rewrite the next_descriptor pointers as we add new 
>requests, and the
>>    device doesn't need to re-read the last descriptor.
>>  - The new device has the DCA tags defined internally 
>instead of needing
>>    them defined statically.
>> 

Andrew,

Thank you for your time and the review comments.  I'll attend to the
details and repost.

sln
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