linux-kernel - ZONE_DMA (was: Re: 2.6.19 -mm merge plans)

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Date:	Wed, 20 Sep 2006 17:22:53 -0700
From:	Andrew Morton <akpm@...l.org>
To:	"Martin J. Bligh" <mbligh@...igh.org>
Cc:	linux-kernel@...r.kernel.org,
	Christoph Lameter <clameter@...r.sgi.com>
Subject: ZONE_DMA (was: Re: 2.6.19 -mm merge plans)

(Subject rewritten, developer cc'ed, thwap delivered)

On Wed, 20 Sep 2006 17:09:57 -0700
"Martin J. Bligh" <mbligh@...igh.org> wrote:

> 
> > introduce-config_zone_dma.patch
> > optional-zone_dma-in-the-vm.patch
> > optional-zone_dma-in-the-vm-tidy.patch
> > optional-zone_dma-for-i386.patch
> > optional-zone_dma-for-x86_64.patch
> > optional-zone_dma-for-ia64.patch
> > remove-zone_dma-remains-from-parisc.patch
> > remove-zone_dma-remains-from-sh-sh64.patch
> 
> Would it not make sense to define what ZONE_DMA actually means
> consistently before trying to change it? The current mess across
> different architectures seems like a disaster area to me.
> 
> What DOES requesting ZONE_DMA from a driver actually mean?
> 

AFAIK it means "floppy disks" ;)

My concern about these patches is that they'll only be useful for
self-compiled kernels, because distros will be forced to enable ZONE_DMA
for evermore anyway.

If that's correct then perhaps we should drop these patches, because they
will serve to weaken ongoing testing.
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