[wplug] 4GB Ram not seen by Linux kernel

[Mackenzie Morgan]

You're running a 32bit kernel, then?  You could theoretically address all
4GB (and not a bit more) on 32bits, except that'd assume you had no drivers
or firmware or anything.  It varies by hardware just how much you'll see on
a 32bit OS.  Install 64bit, and you'll be good because that can
address....umm....Wikipedia says 16 exbibytes (1 exbibyte = 1024 pebibytes,
1 pebibyte = 1024 tebibytes, 1 tebibyte = 1024 gibibytes).

The IEEE caved to the hard drive manufacturers and decided 1024 megabytes
are not a gigabyte.  1000 megabytes is a gigabyte.  We have to call them
gibibytes if we mean 1024.  The "bi" is for binary.  That also means that
when you have "kibibit" data transfer rates, it's kilo binary binary digit
since "bit" is short for "binary digit".  Sounds stupid, eh?

On Feb 6, 2008 7:51 PM, Tom Rhodes <trhodes at freebsd.org> wrote:

> Hi,
>
> I've got a machine here that doesn't like to see the 4GB RAM.  It
> appears to only see 3/4th of it.
>
> New kernel does nothing.  This is the uname:
>
> Linux tornado 2.6.20-1.2320.fc5smp #1 SMP Tue Jun 12 19:40:16 EDT 2007
> i686 i686 i386 GNU/Linux
>
> I've noticed that some Linux distro's have a BIGMEM kernel, but
> am not sure if fc5 has it.  If so, is there a safe way to use
> yum to get and install everything I need?  Thanks,
>
> --
> Tom Rhodes
> _______________________________________________
> wplug mailing list
> wplug at wplug.org
> http://www.wplug.org/mailman/listinfo/wplug
>



-- 
Mackenzie Morgan
Linux User #432169
ACM Member #3445683
http://ubuntulinuxtipstricks.blogspot.com <-my blog of Ubuntu stuff
apt-get moo
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