Re: 2.4.4 kernel reports wrong amount of physical memory

From: Jeff Golds (jgolds@resilience.com)
Date: Mon May 14 2001 - 20:07:53 EST


Rik van Riel wrote:
>
> On Mon, 14 May 2001, Jeff Golds wrote:
>
> > Ahh, it's totally obvious. 1 GB option = 890 MB, 4 GB option =
> > 4GB. Can I assume a linear relation and get 66.2 MB when I
> > select the 64 MB option?
>
> Where did you get the mythical "1GB" option?
>
> Last I looked we had "off", "4GB" and "64GB" ;)
>

Good try, except:

If you are compiling a kernel which will never run on a machine with
more than 1 Gigabyte total physical RAM, answer "off" here (default
choice and suitable for most users). This will result in a "3GB/1GB"
split: 3GB are mapped so that each process sees a 3GB virtual memory
space and the remaining part of the 4GB virtual memory space is used
by the kernel to permanently map as much physical memory as
possible.

If the machine has between 1 and 4 Gigabytes physical RAM, then
answer "4GB" here.

1 GB is not more than 1 GB so "off" is the correct choice, according to the docs.

Oh I get it NOW. "Off" means the docs are just plain "off".

-Jeff

-- 
Jeff Golds
jgolds@resilience.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Tue May 15 2001 - 21:00:38 EST