Memory Issues: /proc/kcore vs. free

Joel Jaeggli joelja at
Thu Mar 22 06:52:51 PST 2001

compile a kernel with high memory support set to 4GB....

options are:
 < 1GB (off)
 > 1GB <= 4GB
 < 64GB

it's in the processor type and features dialog if you run make menuconfig
on a kernel tree...


On Thu, 22 Mar 101, Christopher L. Rogers wrote:

> folks:
> i am trying to determine whether or not i have
> some bad memory or not on some of my beowulf nodes.
> One thing i noticed right away is that ls -l of /proc/kcore
> maxs out at 940 MB for physical ram greater than 1 GB.
> I'm running 2048 MB, which the bios detects. free reports
> 2074 MB but as i said earlier /proc/kcore reports 940 MB.
> (i do have mem=2048M appended in my lilo.conf)
> So is this cause for alarm? Which is the true amount the
> system sees? I need to routinely run jobs on these nodes
> that are about 1 to 1.25 GB., so it makes a difference.
> The system in question is a dual PIII Supermicro 370DL3
> with their latest bios. The bios reports the 2 GB of ram
> as PC133, and the vendor claims it's true registered ECC.
> The kernel is a stock Redhat 7.0 "enterprise" kernel
> (2.2.16-22enterprise)
> Thanks for all your help.
> -Chris Rogers
> crogers at
> _______________________________________________
> Beowulf mailing list, Beowulf at
> To change your subscription (digest mode or unsubscribe) visit

Joel Jaeggli				       joelja at
Academic User Services			     consult at
     PGP Key Fingerprint: 1DE9 8FCA 51FB 4195 B42A 9C32 A30D 121E
It is clear that the arm of criticism cannot replace the criticism of
arms.  Karl Marx -- Introduction to the critique of Hegel's Philosophy of
the right, 1843.

More information about the Beowulf mailing list