4GB RAM a 2.6.x

[Martin Kotys]

Zdravim,

rad by som sa poinformoval ake mate skusenosti s linuxom beziacim s 4GB
ram. Do servera som dal 4x1GB ramky, bios tuto ramku detekoval v
poriadku, avsak po nabootovani Linux pouziva len 3,296GB.

Docital som sa ze je mozne aby Linux spravoval pamat v tzv. 3/1 mode,
resp aby vyuzival plnych 4GB. Tuto moznost som zakompiloval do jadra,
avsak nebadat ziadnu zmenu.

Mojim cielom je spristupnit jednemu procesu viac ako 3GB ramky, kedze sa
na tom stroji vykonavaju vypocty a mnozstvo dat pomaly presahuje
pociatocnu specifikaciu (vypocet samozrejme nieje mozne distribuovat na
viac strojov :)

Mate s tym nejake skusenosti?

Pre viac informacii:

lspci:
00:00.0 Host bridge: Intel Corporation 915G/P/GV Processor to I/O
Controller (rev 04)
00:01.0 PCI bridge: Intel Corporation 915G/P/GV PCI Express Root Port
(rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) PCI Express Port 2 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #3 (rev 03)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB UHCI #4 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) USB2 EHCI Controller (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d3)
00:1e.2 Multimedia audio controller: Intel Corporation
82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation 82801FB/FR (ICH6/ICH6R) LPC
Interface Bridge (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) IDE Controller (rev 03)
00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA
Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family)
SMBus Controller (rev 03)
01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60
[Radeon X300 (PCIE)]
01:00.1 Display controller: ATI Technologies Inc: Unknown device 5b70
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 10)
04:02.0 Communication controller: Conexant: Unknown device 2f20
04:03.0 Ethernet controller: Broadcom Corporation BCM4401 100Base-T (rev
01)

dmesg:
Memory: 3374328k/3406368k available (2061k kernel code, 30908k reserved,
755k data, 228k init, 2488864k highmem)


/proc/meminfo:
MemTotal:      3375304 kB
MemFree:       3135184 kB
Buffers:         10284 kB
Cached:          83352 kB
SwapCached:          0 kB
Active:         155756 kB
Inactive:        61112 kB
HighTotal:     2488864 kB
HighFree:      2278484 kB
LowTotal:       886440 kB
LowFree:        856700 kB
SwapTotal:     1959920 kB
SwapFree:      1959920 kB
Dirty:             136 kB
Writeback:           0 kB
Mapped:         139456 kB
Slab:            12936 kB
CommitLimit:   3647572 kB
Committed_AS:   919152 kB
PageTables:       1596 kB
VmallocTotal:   114680 kB
VmallocUsed:      1152 kB
VmallocChunk:   113512 kB


Vdaka.

-- 
Martin Kotys