Re: [PATCH 2/6] Introduce CONFIG_ZONE_DMA
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- To: Christoph Lameter <clameter@xxxxxxx>
- Subject: Re: [PATCH 2/6] Introduce CONFIG_ZONE_DMA
- From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
- Date: Tue, 19 Sep 2006 10:03:32 +0200
- Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, linux-mm@xxxxxxxxxxxxxxx, Nick Piggin <nickpiggin@xxxxxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, Marcelo Tosatti <marcelo@xxxxxxxxx>, Arjan van de Ven <arjan@xxxxxxxxxxxxx>, Martin Bligh <mbligh@xxxxxxxxxx>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>, Andi Kleen <ak@xxxxxxx>, linux-arch@xxxxxxxxxxxxxxx
- In-reply-to: <Pine.LNX.4.64.0609181027440.19312@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Organization: IBM Corporation
- References: <20060911222729.4849.69497.sendpatchset@xxxxxxxxxxxxxxxxxxxxxxxxx> <20060911222739.4849.79915.sendpatchset@xxxxxxxxxxxxxxxxxxxxxxxxx> <20060918135559.GB15096@xxxxxxxxxxxxx> <1158588487.31364.3.camel@localhost> <Pine.LNX.4.64.0609181027440.19312@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Reply-to: schwidefsky@xxxxxxxxxx
On Mon, 2006-09-18 at 10:28 -0700, Christoph Lameter wrote:
> > s390 needs ZONE_DMA for the memory area below 2GB. That is required for
> > the control structure of channel based I/O. It is not ISA but
> > conceptually related. Can we rename GENERIC_ISA_DMA into GENERIC_IO_DMA
> > or something similar?
>
> The patchset defines CONFIG_ZONE_DMA for s390 so you are fine.
Ok, I've looked at the patch and defining ZONE_DMA is the
straightforward solution. No need to make detours over GENERIC_ISA_DMA.
--
blue skies,
Martin.
Martin Schwidefsky
Linux for zSeries Development & Services
IBM Deutschland Entwicklung GmbH
"Reality continues to ruin my life." - Calvin.
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