4GB RAM a 2.6.x

[Petr Klima]

Zdravim,
AFAIK je to platforme zavisle. Vice, nez ~3GB na proces dostanete jedine 
v pripade, ze pouzivate 64b CPU + 64b OS + 64b dany aplikacni software.

Tosuja

Martin Kotys wrote:
> 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.
>