Re: [gentoo-user] What is HIGHPTE option in kernel?

[Ow Mun Heng <Ow.Mun.Heng@wdc.com>]

On Wed, 2005-08-31 at 20:32 +0200, Bastian Balthazar Bux wrote:
> Ow Mun Heng wrote:
> > [quote]
> > Allocate 3rd-level pagetables from highmem (HIGHPTE)
> > 
> > The VM uses one page table entry for each page of physical memory.
> > For systems with a lot of RAM, this can be wasteful of precious
> > low memory. Setting this option will put user-space page table
> > entries in high memory.
> > [/quote]
> > 
> > I have 1.5Gb of RAM, will this be useful for me?
> > 
> Not sure but:
> 3rd-level pagetables are for systems with a *lot* of memory that don't
> want to waste space in the lowest gig of mem (to keep addresses of high
> mem.).
> 
> So basically no advantage with 1.5 gig

Ah.. I see. Thanks.

(as it turns out, seems like my make oldconfig wasn't really using the
old config. I had many iterations of my kernel being compiled with diff
stuffs. Finally found that the 4GB option wasn't turned 'on')

/me wonders when I will have >4GB of ram and load everything into RAM
(and XFS filesystems). Can you say Super TUX? hehe..

-- 
Ow Mun Heng
Gentoo/Linux on DELL D600 1.4Ghz 1.5GB RAM
98% Microsoft(tm) Free!! 
Neuromancer 09:53:42 up 11:52, 5 users, load average: 0.74, 1.25, 2.45 


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