| View previous topic :: View next topic |
| Author |
Message |
cathalob
n00b
Joined: 28 Mar 2004
Posts: 12
|
 Posted: Sun Mar 28, 2004 5:37 pm Post subject: where's the rest of my RAM |
 |
|
Hi I am relatively new to gentoo and have recently installed 2004.0 using the gentoo-dev kernel sources. I have enabled highmem 64Gb and have 4.5 Gb RAM installed. When I check the amount of RAM present in /proc/meminfo it lists the amount of physical memory present as being 4064584Kb. However when the BIOS perfomrs the memory check upon initialising it shows all the RAM to be present.
Should this be happening??
Help??
Cathal |
|
| Back to top |
|
 |
BradN
Advocate
Joined: 19 Apr 2002
Posts: 2391
Location: Wisconsin (USA)
|
| Posted: Sun Mar 28, 2004 7:25 pm Post subject: |
|
|
Try running "dmesg" and look at the beginning of the log that deals with memory - for instance, on my 160MB ram router, it looks like:
| Code: | Linux version 2.6.3-gentoo-r1 (root@deathtrap) (gcc version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r2, propolice)) #1 Sun Mar 7 18:12:40 CST 2004
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009f800 (usable)
BIOS-e820: 000000000009f800 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e7000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000009ffdc00 (usable)
BIOS-e820: 0000000009ffdc00 - 0000000009fffc00 (ACPI data)
BIOS-e820: 0000000009fffc00 - 000000000a000000 (ACPI NVS)
BIOS-e820: 00000000fffe7000 - 0000000100000000 (reserved)
159MB LOWMEM available.
On node 0 totalpages: 40957
DMA zone: 4096 pages, LIFO batch:1
Normal zone: 36861 pages, LIFO batch:8
HighMem zone: 0 pages, LIFO batch:1 |
Of particular interest will be whether any zones above 0000000100000000 (the 4GB cutoff) are being reported by the BIOS, and if anything shows up as HighMem.
If the zones aren't being reported, you could try forcing the amount with a kernel option: mem=4608M |
|
| Back to top |
|
|
cathalob
n00b
Joined: 28 Mar 2004
Posts: 12
|
| Posted: Mon Mar 29, 2004 11:52 am Post subject: |
|
|
| When I run dmesg I don't get that sort of output I get a listing of my CPUs, and data on network cards, SCSI controllers and ReiserFS initialisation messages. It doesn't seem to mention anything about RAM |
|
| Back to top |
|
|
cathalob
n00b
Joined: 28 Mar 2004
Posts: 12
|
| Posted: Mon Mar 29, 2004 12:17 pm Post subject: |
|
|
My bad  Had recompiled the kernel to include 64Gb Highmem but saved the kernel image under the wrong name. Therefore when I thought my kernel had support for greater than 4 Gb ram I was mistaken. |
|
| Back to top |
|
|
BradN
Advocate
Joined: 19 Apr 2002
Posts: 2391
Location: Wisconsin (USA)
|
| Posted: Mon Mar 29, 2004 8:59 pm Post subject: |
|
|
it happens  |
|
| Back to top |
|
|
|
Kernel & Hardware
