Which architecture ISO did you load (i386? x86-64? ia64?)
Hopefully you've loaded CentOs x86-64 4.1.
Under the 'x86' architecture (32 bit), the system can only address 4
GB of allocated memory. Allocated memory is made up of physical ram,
and any I/O space needed by devices. The I/o space is allocated
starting at 4GB then working down. One limitation is that the
boundry must be on a power of two, so you get 4 GB minus a power of
two big enough for the kernel-reserved I/O areas.
gonzo:~ jim$ echo "(2^32-(3504968*1024))/1024" | bc -l
689336.00000000000000000000
If you have loaded x86-64, then I have no idea what might be wrong.
If you loaded x86, then the fix is simple... :-)
jim
On Jul 28, 2005, at 6:56 PM, Charles Lockhart wrote:
The question is probably goofy, not the ram.
I just installed 4GB of RAM on a Dell Precision 450 running
CentOS4 (dual Xeon P4 workstation). The BIOS reports seeing all
of it, but when I run "cat /proc/meminfo" I see number that don't
see quite right for the MemTotal. Is the OS really not seeing the
RAM, or is is it just listed differently? I remember something
about a kernel limitation at around 4GB, and there was a special
kernel for running with gt 4GB, but now the threshold seems to be
16GB, it seems like 4GB wouldn't cause a problem.
I got the memory from Kingston, via their RAM selector web
interface guide, so it's the right memory for the machine. I just
don't see why it's not all showing up (my other Dell with FC2 on it
and having 512MB of RAM shows memtotal as 515372 kB, which while
not exactly 512MB, seems pretty close).
[EMAIL PROTECTED] ~]$ cat /proc/meminfo
MemTotal: 3504968 kB
MemFree: 3287304 kB
Buffers: 13948 kB
Cached: 122292 kB
SwapCached: 0 kB
Active: 84376 kB
Inactive: 98208 kB
HighTotal: 2620884 kB
HighFree: 2444352 kB
LowTotal: 884084 kB
LowFree: 842952 kB
SwapTotal: 6144852 kB
SwapFree: 6144852 kB
Dirty: 136 kB
Writeback: 0 kB
Mapped: 59532 kB
Slab: 20292 kB
Committed_AS: 94336 kB
PageTables: 1672 kB
VmallocTotal: 106488 kB
VmallocUsed: 5368 kB
VmallocChunk: 100996 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 2048 kB
[EMAIL PROTECTED] ~]$
_______________________________________________
LUAU@lists.hosef.org mailing list
http://lists.hosef.org/cgi-bin/mailman/listinfo/luau
