Any advantage running the PAE kernel with less than 4GB RAM?

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Any advantage running the PAE kernel with less than 4GB RAM?

Postby squeezy on Wed Aug 22, 2012 1:25 pm

My computer uses an older single-core Athlon 64 CPU. It supports PAE but I only have 3 GB RAM. Is there any advantge to using the PAE kernel if the machine really can't take advantage of it? Lately I've been experimenting with the std 486 kernel and it seems to be a tad more responsive. Could be my imagination though, or a really good install :lol:

Just wondering for wondering's sake...thanks!
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Re: Any advantage running the PAE kernel with less than 4GB

Postby nunol on Wed Aug 22, 2012 1:39 pm

The hardware NX-bit could be a good reason to run the i686-pae kernel if you can: http://en.wikipedia.org/wiki/NX_bit

I would only use i486 if the CPU doesn't work with the i686-pae kernel or I was trying to maximize performance at all cost. The i486 kernel doesn't support SMP, less overhead... that's probably what you see:
http://womble.decadent.org.uk/blog/upco ... -i386.html
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Re: Any advantage running the PAE kernel with less than 4GB

Postby squeezy on Wed Aug 22, 2012 7:49 pm

nunol wrote:The hardware NX-bit could be a good reason to run the i686-pae kernel if you can: http://en.wikipedia.org/wiki/NX_bit

I would only use i486 if the CPU doesn't work with the i686-pae kernel or I was trying to maximize performance at all cost. The i486 kernel doesn't support SMP, less overhead... that's probably what you see:
http://womble.decadent.org.uk/blog/upco ... -i386.html


Interesting, nunol. So there are security advantages in using the PAE kernel even in lower memory applications. I do like the snappier feel, but security is a good reason to update :D
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Re: Any advantage running the PAE kernel with less than 4GB

Postby nunol on Wed Aug 22, 2012 8:14 pm

You could try to have both by making your own kernel.

Check "4.5 Building a custom kernel from Debian kernel source":
http://kernel-handbook.alioth.debian.or ... tasks.html
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