Re: Over 2.5 GB ram problem
On 7/10/2013 7:03 PM, Gary Roach wrote:
> Second, you are right. The i5-750 is a 64 bit processor. But the
> documentation for the pae enabled kernel specifically lists all of the
> Intel P series processors as compatible. Ergo, the P4 should be able to
> access well over 4GB of ram. So what is wrong?
Maybe if you presented some dmesg logging, output of 'free -m', etc, we
could offer assistance. At this point all you say is "PAE kernel" but
"only 2.5GB of memory". This isn't possible, strictly speaking, with
PAE. The kernel will map all RAM the BIOS presents to it. Did you
create a 1.5GB RAMdisk by chance? That would cause this problem. If
not, probably what's going on is some kind of BIOS issue. For instance
if you have
System BIOS shadowing/cacheable
Video RAM shadowing/cacheable
etc
enabled in your AMI/AWARD/Phoenix BIOS setup, these things will steal
from the total physical RAM available to the Linux kernel. If you have
an onboard GPU and have allocated a large amount of system RAM for the
frame buffer this steals memory from the kernel. Some types of PCI
expansion boards can also steal system memory, or map IO address space
in a way that makes that memory unavailable to the kernel.
--
Stan
Reply to: