[SLL] 32 bit distro that supports 4GB ram with stock kernel

Jesse Keating jkeating at j2solutions.net
Wed Apr 2 07:08:51 PDT 2008


On Wed, 2008-04-02 at 07:01 -0700, Brian C. Lane wrote:
> 
> Actually, that sounds right. What happens is that the kernel uses a 4G
> virtual space for each process, and reserves a bit of it for itself. So
> when you hit 4G the usable amount of space is actually 4G - Kernel Memory.
> 
> Here is an article that does a good job of describing it:
> 
> http://kerneltrap.org/node/2450

Not really, as nothing on this page really states that 3G is the max a
32bit kernel can see.  It talks about 1G without HIGHMEM, or two
different HIGHMEM barriers, 4G and 64G.

I still posit that Ubuntu claiming that their 32bit kernels only support
up to 3G of ram seems fishy.

-- 
Jesse Keating RHCE      (jkeating.livejournal.com)
Fedora Project          (fedoraproject.org/wiki/JesseKeating)
GPG Public Key          (geek.j2solutions.net/jkeating.j2solutions.pub)
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