linux-kernel - Re: Pull request: DMA pool updates

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Message-ID: <20080204175526.GA21144@linux.intel.com>
Date:	Mon, 4 Feb 2008 09:55:26 -0800
From:	mark gross <mgross@...ux.intel.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Linus Torvalds <torvalds@...l.org>, Andrew Morton <akpm@...l.org>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: Pull request: DMA pool updates

On Mon, Jan 28, 2008 at 05:11:47PM -0700, Matthew Wilcox wrote:
> G'day Linus, mate
> 
> Could you pull the dmapool branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc.git please?
> 
> All the patches have been posted to linux-kernel before, and various
> comments (and acks) have been taken into account.
> 
> It's a fairly nice performance improvement, so would be good to get in.
> It's survived a few hours of *mumble* high-stress database benchmark,
> so I have high confidence in its stability.

I haven't looked at this yet but, I've been doing some work with the
IOMMU performance impacts on DMA operations.  DMApooling  could provide
a way to mitigate some of the spankage gotten when using IOMMU's.

--mgross

> 
> -- 
> Intel are signing my paycheques ... these opinions are still mine
> "Bill, look, we understand that you're interested in selling us this
> operating system, but compare it to ours.  We can't possibly take such
> a retrograde step."
> 
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