Re: lowmem_reserve question

From: Con Kolivas
Date: Mon Apr 03 2006 - 00:48:45 EST


On Monday 03 April 2006 14:42, Mike Galbraith wrote:
> On Mon, 2006-04-03 at 12:48 +1000, Con Kolivas wrote:
> > Furthermore, now that we have the option of up to 3GB lowmem split on
> > 32bit we can have a default lowmem_reserve of almost 12MB (if I'm reading
> > it right) which seems very tight with only 16MB of ZONE_DMA.
>
> I haven't crawled around in the vm for ages, but I think that's only
> 16MB if you support antique cards.

That's what the ram is used for, but that is all the ZONE_DMA 32bit machines
get, whether you use it for that purpose or not. My concern is that this will
have all sorts of effects on the balancing since it will always appear almost
full.

Cheers,
Con
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