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From: Randy Dunlap <randy.dunlap@oracle.com>
To: Kyle McMartin <kyle@mcmartin.ca>
Cc: Seetharam Dharmosoth <seetharam_kernel@yahoo.co.in>,
	linux-kernel@vger.kernel.org
Subject: Re: que: How can we Eliminate the DMA Zone from the kernel?
Date: Thu, 25 Jan 2007 11:33:12 -0800	[thread overview]
Message-ID: <20070125113312.830bbada.randy.dunlap@oracle.com> (raw)
In-Reply-To: <20070125153510.GA13938@athena.road.mcmartin.ca>

On Thu, 25 Jan 2007 10:35:10 -0500 Kyle McMartin wrote:

> On Thu, Jan 25, 2007 at 12:56:30PM +0000, Seetharam Dharmosoth wrote:
> > Hi,
> > 
> > Want to remove DMA zone the from the Linux Kernel.
> > (Don't want to use DMA Zone, because i am not
> > using ISA bus, am using PCI bus. So, I don't need
> > this)
> > 
> 
> Just because you don't need ISA, doesn't mean you don't need
> ZONE_DMA. Various PCI cards have limitations on what addresses they
> can DMA to (24 bits on some old PCI sound cards iirc, and more recently
> a 30 bit DMA limitation on some Broadcom networking equipment.)

If your platform really doesn't need ZONE_DMA, then you should
look at lots of discussion and patches on the linux-mm
mailing list.

See http://linux-mm.org/LinuxKernelMailingLists
and emails or patches from Christoph Lameter, Andi Kleen,
and Marcelo Tosatti.

---
~Randy

      reply	other threads:[~2007-01-25 19:38 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-25 12:56 Seetharam Dharmosoth
2007-01-25 15:35 ` Kyle McMartin
2007-01-25 19:33   ` Randy Dunlap [this message]

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