Re: [PATCH 5/6] Optional ZONE_DMA for x86_64

Matthew Wilcox
2006-09-12T11:40:27Z

On Tue, Sep 12, 2006 at 08:40:22AM +0200, Andi Kleen wrote:
> I think I would prefer to not make GFP_DMA32 optional.
> Adding a 4GB limit CONFIG to a 64bit kernel just seems somewhat
> dumb.

Hmm? I would think that the majority of x86-64 users have <4GB.
I bought an ASUS P5RD1-VM motherboard a few months ago which
has 2 DIMM slots. Look at their list of 'hot' motherboards:
http://usa.asus.com/products2.aspx?l1=3&l2\x11 I don't see a single one
with more than 4 slots. 2GB DIMMs are hovering around the $400 mark;
I'm not convinced that your average user is spending $1200 on RAM at
this point.