Messages in this thread | | | Date | Thu, 25 Jan 2007 11:33:12 -0800 | From | Randy Dunlap <> | Subject | Re: que: How can we Eliminate the DMA Zone from the kernel? |
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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.
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