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SubjectRe: 2.6.32-rc3: low mem - only 378MB on x86_32 with 64GB. Why?
On Tue, 2009-10-06 at 07:26 -0700, Linus Torvalds wrote:

> The Intel Xorg guys used to do everything in 32-bit kernels because they
> were also testing that they didn't break compatibility (which is a big
> deal with that whole crazy DRM-in-kernel/direct-rendering-in-user-space
> thing) and seemingly didn't realize that the compat layer was _supposed_
> to mean that they could run a 64-bit kernel and still have a working
> 32-bit land.
> It's driver interfaces like that that tend to break. ioctl's etc. But I
> have heard less noise about it lately, so I do think it's mostly working.

I'm running a 32-bit Ubuntu karmic distro with a 64-bit kernel on my
thinkpad and so far, I yet have to encounter a single obvious problem
due to the compat layer. Everything seems to work fine including 3D,
compiz fancyness in X etc... :-)


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