| 1 |
I've made my problem go away, but I'm a bit curious about why it was |
| 2 |
happening. |
| 3 |
|
| 4 |
I've got nine or so Dell 1850's with 2 x 2GB chips. When I compile |
| 5 |
gentoo-source 2.6.15-r1 (and 2.6.14-r5) with support for 4GB I see only |
| 6 |
3GB. 1GB lowmem and 2GB highmem. |
| 7 |
|
| 8 |
ws04 ~ # cat /proc/meminfo |
| 9 |
MemTotal: 3107408 kB |
| 10 |
MemFree: 1731660 kB |
| 11 |
Buffers: 219720 kB |
| 12 |
Cached: 937980 kB |
| 13 |
SwapCached: 0 kB |
| 14 |
Active: 455100 kB |
| 15 |
Inactive: 717924 kB |
| 16 |
HighTotal: 2227968 kB |
| 17 |
HighFree: 1271588 kB |
| 18 |
|
| 19 |
When I recompile on the same hardware with support for 64GB RAM I see |
| 20 |
the full 4GB in the usual 1GB/3GB split. |
| 21 |
|
| 22 |
nms02 ~ # cat /proc/meminfo |
| 23 |
MemTotal: 4147776 kB |
| 24 |
MemFree: 3762712 kB |
| 25 |
Buffers: 151404 kB |
| 26 |
Cached: 45116 kB |
| 27 |
SwapCached: 0 kB |
| 28 |
Active: 56724 kB |
| 29 |
Inactive: 145000 kB |
| 30 |
HighTotal: 3276544 kB |
| 31 |
HighFree: 3222936 kB |
| 32 |
|
| 33 |
However on my HP DL360 with 4 x 1GB RAM I see the 4GB, though it's a bit |
| 34 |
smaller, with 4GB enabled in the kernel. Same kernel version as the Dell's. |
| 35 |
|
| 36 |
ramin@azul ~ $ cat /proc/meminfo |
| 37 |
MemTotal: 3977744 kB |
| 38 |
MemFree: 116792 kB |
| 39 |
Buffers: 296108 kB |
| 40 |
Cached: 3157952 kB |
| 41 |
SwapCached: 0 kB |
| 42 |
Active: 2725152 kB |
| 43 |
Inactive: 782956 kB |
| 44 |
HighTotal: 3096552 kB |
| 45 |
HighFree: 8680 kB |
| 46 |
|
| 47 |
I've been Googling around for an explantion, but am not really sure what |
| 48 |
I'm looking for. I'd assume that I might lose a few hundred MB if the 2 |
| 49 |
x 2GB chips are slightly bigger than the 4GB limit rather than the full |
| 50 |
1GB that seems to disappear. I'm guessing some wacky motherboard |
| 51 |
interleaving thing where highmem ends up being one chip and the lowmem |
| 52 |
the 896MB on the other chip. |
| 53 |
|
| 54 |
Anyone have a decent theory on this with a nice link? |
| 55 |
|
| 56 |
kashani |
| 57 |
-- |
| 58 |
gentoo-user@g.o mailing list |
Archives