Re: [RFC/PATCH, 1/4] readX_check() performance evaluation

From: Andi Kleen <>
Date: 2004-01-29 08:39:05
On Wed, 28 Jan 2004 13:14:05 -0800
Grant Grundler <> wrote:

> > I believe ppc64 has adopted it too. Of course most drivers don't 
> > use it yet.
> <search 2.6.2-rc2 source tree>
> grundler <502>find -name '*.[chS]' | xargs fgrep pci_dma_error
> ./include/asm-x86_64/pci.h:#define pci_dma_error(x) ((x) ==
> bad_dma_address)
> grundler <503>
> That explains why most drivers don't use it yet.
> It's only supported on one arch.
> Maybe propose this to linux-pci mailing list?

It was discussed on linux-arch and ppc64 at least agreed on it.
The other architectures can get it via a comptibility #define that 
is always 0.

There was a patch for that somewhere, but apparently it was never merged
or not merged yet.

Anton, what was the state of that?

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Received on Wed Jan 28 16:49:10 2004

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