Arch Linux

RAM wird nicht vollständig erkannt/angezeigt!

django

Hallo Leute,

ich habe jetzt Arch im Dualboot mit Windows auf einem 4GB Laptop.Alles klappt auch wunderbar,bis auf,dass sowohl Archey als auch Conky nur 2.81GB RAM anzeigen.
Heßt das jetzt,dass es nur falsch angezeigt wird und 4GB sind trotzdem verwendabr oder sind auch nur 2.81GB verwendbar?
Vielleicht kennt das jemand von euch und kann mir da weiterhelfen.

Lycanthropist

32Bit oder 64Bit?

qui

Nur zur Sicherheit: Was sagt `free -h' bzw. `grep -i mem /proc/meminfo' und `uname -m'?

django

Es ist die 32Bit Version (i686).

free -h
             total       used       free     shared    buffers     cached
Mem:          2,8G       743M       2,1G         0B        33M       375M
-/+ buffers/cache:       334M       2,5G
Swap:         4,0G         0B       4,0G

grep -i mem /proc/meminfo

MemTotal:        2943772 kB
MemFree:         2177100 kB
Shmem:             54524 kB

uname -m
i686

skull-y

32-Bit kann nur bis ~3GB RAM addressieren, ausser nutzt einen entsprechenden Kernel (PAE?). 64 Bit sind dein Freund und Helfer, wenn es um mehr als 3 GB geht.

django

Was?Ich dachte immer 32Bit Betriebssysteme könnten auch 4GB RAM addressieren.
Und wie läuft das mit PAE?Muss ich das einfach irgendwo aktivieren?

skull-y

Du musst den Kernel wohl dafür selber kompilieren, einfach aktivieren gibt es da nicht. Im AUR gibt es ein entsprechendes PKGBUILD.

django

Danke,werd mich mal nach diesem Video richten und schauen was so geht!

GerBra

Außerdem gibt es noch Beschränkungen von zB. Chipsätzen und auch Hardware im Laptop verwendet/blockiert ggf. Speicherbereiche die dann für Betriebssysteme nicht verwendbar sind.

Bsp. mein Thinkpad T60. hat aktuell 2 x 2GB Riegel, im BIOS werde auch 4096MB Ram angezeigt.
Betriebssysteme (egal welches, aktuell FreeBSD amd64) sehen aber als verfügbar nur 2927 MB. Beim T60 liegt das v.a. am verbauten (Memory-)Controller-Chipsatz Intel 945GM/PM, dieser kann dem System lediglich rund 3GB zur verfügung stellen. Davon gehen dann noch eine gewisse Menge für die Shared-Memory-Grafikkarte drauf.

Egal welches System/Kernel/32oder64Bit ich verwede, an diesen Schranken komme ich nicht vorbei.
Evtl. ist es bei deinem ja etwas ähnliches.

dmesg | grep -i mem
und ggf. Hersteller+Modell des laptops wäre für Hilfswillige sicher noch interessant.

Creshal

django schriebWas?Ich dachte immer 32Bit Betriebssysteme könnten auch 4GB RAM addressieren.

Können sie. In die 4 GiB fallen aber auch so Sachen wie Grafikkarten-RAM, MMIO, vom BIOS reservierte Blöcke, etc. pp.

Sauberere Lösung als PAE wäre übrigens, auf 64 Bit umzustellen.

fs4000

Tu dir den Gefallen und vergiss PAE, das ist keine Lösung sondern eine Krücke, aber Linus kann dir das besser erklären: http://cl4ssic4l.wordpress.com/2011/05/24/linus-torvalds-about-pae/

django

OK,ihr drei habt mich doch überzeugt,die Finger von PAE zu lassen.

Hier mal "dmesg | grep -i mem"

[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009bbff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009bc00-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000b5ea3fff] usable
[    0.000000] BIOS-e820: [mem 0x00000000b5ea4000-0x00000000b5ec8fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000b5ec9000-0x00000000b5ecafff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000b5ecb000-0x00000000b5ecdfff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000b5ece000-0x00000000b5edefff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000b5edf000-0x00000000b5edffff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000b5ee0000-0x00000000b5f06fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000b5f07000-0x00000000b5f07fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000b5f08000-0x00000000b5f08fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000b5f09000-0x00000000b5f13fff] ACPI data
[    0.000000] BIOS-e820: [mem 0x00000000b5f14000-0x00000000b5f19fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000b5f1a000-0x00000000b5f38fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000b5f39000-0x00000000b5ffffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000ffa00000-0x00000000ffbfffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000ffe00000-0x00000000ffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000013fffffff] usable
[    0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[    0.000000] e820: update [mem 0xb6000000-0xffffffff] usable ==> reserved
[    0.000000] found SMP MP-table at [mem 0x000fd650-0x000fd65f] mapped at [c00fd650]
[    0.000000] Scanning 1 areas for low memory corruption
[    0.000000] initial memory mapped: [mem 0x00000000-0x01bfffff]
[    0.000000] Base memory trampoline at [c0097000] 97000 size 16384
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000]  [mem 0x00000000-0x000fffff] page 4k
[    0.000000] init_memory_mapping: [mem 0x37000000-0x373fffff]
[    0.000000]  [mem 0x37000000-0x373fffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x30000000-0x36ffffff]
[    0.000000]  [mem 0x30000000-0x36ffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x00100000-0x2fffffff]
[    0.000000]  [mem 0x00100000-0x003fffff] page 4k
[    0.000000]  [mem 0x00400000-0x2fffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x37400000-0x377fdfff]
[    0.000000]  [mem 0x37400000-0x377fdfff] page 4k
[    0.000000] RAMDISK: [mem 0x37a12000-0x37d00fff]
[    0.000000] Allocated new RAMDISK: [mem 0x3750f000-0x377fd4ab]
[    0.000000] Move RAMDISK from [mem 0x37a12000-0x37d004ab] to [mem 0x3750f000-0x377fd4ab]
[    0.000000] 2024MB HIGHMEM available.
[    0.000000] 887MB LOWMEM available.
[    0.000000]   DMA      [mem 0x00001000-0x00ffffff]
[    0.000000]   Normal   [mem 0x01000000-0x377fdfff]
[    0.000000]   HighMem  [mem 0x377fe000-0xb5ffffff]
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x00001000-0x0009afff]
[    0.000000]   node   0: [mem 0x00100000-0xb5ea3fff]
[    0.000000]   node   0: [mem 0xb5f39000-0xb5ffffff]
[    0.000000] free_area_init_node: node 0, pgdat c15aeb00, node_mem_map f5e4f020
[    0.000000]   DMA zone: 32 pages used for memmap
[    0.000000]   Normal zone: 1744 pages used for memmap
[    0.000000]   HighMem zone: 4049 pages used for memmap
[    0.000000]   HighMem zone: 517997 pages, LIFO batch:31
[    0.000000] PM: Registered nosave memory: 000000000009b000 - 000000000009c000
[    0.000000] PM: Registered nosave memory: 000000000009c000 - 00000000000a0000
[    0.000000] PM: Registered nosave memory: 00000000000a0000 - 00000000000e0000
[    0.000000] PM: Registered nosave memory: 00000000000e0000 - 0000000000100000
[    0.000000] e820: [mem 0xb6000000-0xdfffffff] available for PCI devices
[    0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups
[    0.000000] Initializing HighMem for node 0 (000377fe:000b6000)
[    0.000000] Memory: 2940180k/2981888k available (4178k kernel code, 40704k reserved, 1705k data, 572k init, 2071988k highmem)
[    0.000000] virtual kernel memory layout:
    lowmem  : 0xc0000000 - 0xf77fe000   ( 887 MB)
[    0.003636] Initializing cgroup subsys memory
[    0.110988] PM: Registering ACPI NVS region [mem 0xb5ea4000-0xb5ec8fff] (151552 bytes)
[    0.110988] PM: Registering ACPI NVS region [mem 0xb5ecb000-0xb5ecdfff] (12288 bytes)
[    0.110988] PM: Registering ACPI NVS region [mem 0xb5edf000-0xb5edffff] (4096 bytes)
[    0.110988] PM: Registering ACPI NVS region [mem 0xb5f07000-0xb5f07fff] (4096 bytes)
[    0.110988] PM: Registering ACPI NVS region [mem 0xb5f14000-0xb5f19fff] (24576 bytes)
[    0.111396] PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000)
[    0.111400] PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] reserved in E820
[    0.378077] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
[    0.378079] pci_bus 0000:00: root bus resource [mem 0x000d0000-0x000d3fff]
[    0.378082] pci_bus 0000:00: root bus resource [mem 0x000d4000-0x000d7fff]
[    0.378084] pci_bus 0000:00: root bus resource [mem 0x000d8000-0x000dbfff]
[    0.378087] pci_bus 0000:00: root bus resource [mem 0x000dc000-0x000dffff]
[    0.378089] pci_bus 0000:00: root bus resource [mem 0x000e0000-0x000e3fff]
[    0.378091] pci_bus 0000:00: root bus resource [mem 0x000e4000-0x000e7fff]
[    0.378094] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfffff]
[    0.378294] pci 0000:00:02.0: reg 10: [mem 0xd0000000-0xd03fffff 64bit]
[    0.378303] pci 0000:00:02.0: reg 18: [mem 0xc0000000-0xcfffffff 64bit pref]
[    0.378416] pci 0000:00:02.1: reg 10: [mem 0xd0400000-0xd04fffff 64bit]
[    0.378895] pci 0000:00:1a.7: reg 10: [mem 0xd4e04c00-0xd4e04fff]
[    0.378895] pci 0000:00:1b.0: reg 10: [mem 0xd4e00000-0xd4e03fff 64bit]
[    0.378895] pci 0000:00:1d.7: reg 10: [mem 0xd4e04800-0xd4e04bff]
[    0.379421] pci 0000:00:1f.2: reg 24: [mem 0xd4e04000-0xd4e047ff]
[    0.379650] pci 0000:00:1f.3: reg 10: [mem 0xd4e05000-0xd4e050ff 64bit]
[    0.380275] pci 0000:01:00.0: reg 10: [mem 0xd3920000-0xd3923fff 64bit]
[    0.380736] pci 0000:01:00.0: reg 30: [mem 0xd3900000-0xd391ffff pref]
[    0.381531] pci 0000:00:1c.0:   bridge window [mem 0xd3900000-0xd4cfffff]
[    0.381676] pci 0000:02:00.0: reg 10: [mem 0xd2500000-0xd250ffff 64bit]
[    0.390031] pci 0000:00:1c.1:   bridge window [mem 0xd2500000-0xd38fffff]
[    0.390131] pci 0000:00:1c.2:   bridge window [mem 0xd0500000-0xd24fffff]
[    0.390236] pci 0000:0b:03.0: reg 10: [mem 0xd4d00000-0xd4d007ff]
[    0.390422] pci 0000:0b:03.1: reg 10: [mem 0xd4d00900-0xd4d009ff]
[    0.390607] pci 0000:0b:03.2: reg 10: [mem 0xd4d00800-0xd4d008ff]
[    0.390829] pci 0000:00:1e.0:   bridge window [mem 0xd4d00000-0xd4dfffff]
[    0.390842] pci 0000:00:1e.0:   bridge window [mem 0x000a0000-0x000bffff] (subtractive decode)
[    0.390845] pci 0000:00:1e.0:   bridge window [mem 0x000d0000-0x000d3fff] (subtractive decode)
[    0.390847] pci 0000:00:1e.0:   bridge window [mem 0x000d4000-0x000d7fff] (subtractive decode)
[    0.390850] pci 0000:00:1e.0:   bridge window [mem 0x000d8000-0x000dbfff] (subtractive decode)
[    0.390852] pci 0000:00:1e.0:   bridge window [mem 0x000dc000-0x000dffff] (subtractive decode)
[    0.390855] pci 0000:00:1e.0:   bridge window [mem 0x000e0000-0x000e3fff] (subtractive decode)
[    0.390857] pci 0000:00:1e.0:   bridge window [mem 0x000e4000-0x000e7fff] (subtractive decode)
[    0.390860] pci 0000:00:1e.0:   bridge window [mem 0xc0000000-0xfebfffff] (subtractive decode)
[    0.410515] vgaarb: device added: PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
[    0.419120] e820: reserve RAM buffer [mem 0x0009bc00-0x0009ffff]
[    0.419122] e820: reserve RAM buffer [mem 0xb5ea4000-0xb7ffffff]
[    0.419125] e820: reserve RAM buffer [mem 0xb6000000-0xb7ffffff]
[    0.443278] system 00:02: [mem 0xfed00000-0xfed003ff] has been reserved
[    0.443820] system 00:08: [mem 0xfed1c000-0xfed1ffff] has been reserved
[    0.443824] system 00:08: [mem 0xfed14000-0xfed17fff] has been reserved
[    0.443827] system 00:08: [mem 0xfed18000-0xfed18fff] has been reserved
[    0.443830] system 00:08: [mem 0xfed19000-0xfed19fff] has been reserved
[    0.443833] system 00:08: [mem 0xe0000000-0xefffffff] has been reserved
[    0.443836] system 00:08: [mem 0xfed20000-0xfed3ffff] has been reserved
[    0.443839] system 00:08: [mem 0xfeb00000-0xfeb03fff] has been reserved
[    0.443842] system 00:08: [mem 0xfed45000-0xfed8ffff] has been reserved
[    0.494500] pci 0000:00:1c.0: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 01] add_size 200000
[    0.494513] pci 0000:00:1c.1: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 02] add_size 200000
[    0.494525] pci 0000:00:1c.2: bridge window [mem 0x00100000-0x000fffff 64bit pref] to [bus 03-0a] add_size 200000
[    0.494543] pci 0000:00:1c.0: res[15]=[mem 0x00100000-0x000fffff 64bit pref] get_res_add_size add_size 200000
[    0.494545] pci 0000:00:1c.1: res[15]=[mem 0x00100000-0x000fffff 64bit pref] get_res_add_size add_size 200000
[    0.494548] pci 0000:00:1c.2: res[15]=[mem 0x00100000-0x000fffff 64bit pref] get_res_add_size add_size 200000
[    0.494555] pci 0000:00:1c.0: BAR 15: assigned [mem 0xd4f00000-0xd50fffff 64bit pref]
[    0.494560] pci 0000:00:1c.1: BAR 15: assigned [mem 0xd5100000-0xd52fffff 64bit pref]
[    0.494565] pci 0000:00:1c.2: BAR 15: assigned [mem 0xd5300000-0xd54fffff 64bit pref]
[    0.494579] pci 0000:00:1c.0:   bridge window [mem 0xd3900000-0xd4cfffff]
[    0.494584] pci 0000:00:1c.0:   bridge window [mem 0xd4f00000-0xd50fffff 64bit pref]
[    0.494603] pci 0000:00:1c.1:   bridge window [mem 0xd2500000-0xd38fffff]
[    0.494608] pci 0000:00:1c.1:   bridge window [mem 0xd5100000-0xd52fffff 64bit pref]
[    0.494626] pci 0000:00:1c.2:   bridge window [mem 0xd0500000-0xd24fffff]
[    0.494632] pci 0000:00:1c.2:   bridge window [mem 0xd5300000-0xd54fffff 64bit pref]
[    0.494647] pci 0000:00:1e.0:   bridge window [mem 0xd4d00000-0xd4dfffff]
[    0.494837] pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff]
[    0.494839] pci_bus 0000:00: resource 7 [mem 0x000d0000-0x000d3fff]
[    0.494842] pci_bus 0000:00: resource 8 [mem 0x000d4000-0x000d7fff]
[    0.494844] pci_bus 0000:00: resource 9 [mem 0x000d8000-0x000dbfff]
[    0.494846] pci_bus 0000:00: resource 10 [mem 0x000dc000-0x000dffff]
[    0.494849] pci_bus 0000:00: resource 11 [mem 0x000e0000-0x000e3fff]
[    0.494851] pci_bus 0000:00: resource 12 [mem 0x000e4000-0x000e7fff]
[    0.494854] pci_bus 0000:00: resource 13 [mem 0xc0000000-0xfebfffff]
[    0.494859] pci_bus 0000:01: resource 1 [mem 0xd3900000-0xd4cfffff]
[    0.494862] pci_bus 0000:01: resource 2 [mem 0xd4f00000-0xd50fffff 64bit pref]
[    0.494867] pci_bus 0000:02: resource 1 [mem 0xd2500000-0xd38fffff]
[    0.494869] pci_bus 0000:02: resource 2 [mem 0xd5100000-0xd52fffff 64bit pref]
[    0.494874] pci_bus 0000:03: resource 1 [mem 0xd0500000-0xd24fffff]
[    0.494877] pci_bus 0000:03: resource 2 [mem 0xd5300000-0xd54fffff 64bit pref]
[    0.494880] pci_bus 0000:0b: resource 1 [mem 0xd4d00000-0xd4dfffff]
[    0.494887] pci_bus 0000:0b: resource 6 [mem 0x000a0000-0x000bffff]
[    0.494889] pci_bus 0000:0b: resource 7 [mem 0x000d0000-0x000d3fff]
[    0.494892] pci_bus 0000:0b: resource 8 [mem 0x000d4000-0x000d7fff]
[    0.494894] pci_bus 0000:0b: resource 9 [mem 0x000d8000-0x000dbfff]
[    0.494896] pci_bus 0000:0b: resource 10 [mem 0x000dc000-0x000dffff]
[    0.494899] pci_bus 0000:0b: resource 11 [mem 0x000e0000-0x000e3fff]
[    0.494901] pci_bus 0000:0b: resource 12 [mem 0x000e4000-0x000e7fff]
[    0.494904] pci_bus 0000:0b: resource 13 [mem 0xc0000000-0xfebfffff]
[    0.570154] Freeing initrd memory: 3004k freed
[    0.571819] Scanning for low memory corruption every 60 seconds
[    0.957334] Freeing unused kernel memory: 572k freed
[    1.006185] ehci-pci 0000:00:1a.7: irq 19, io mem 0xd4e04c00
[    1.018543] ehci-pci 0000:00:1d.7: irq 23, io mem 0xd4e04800
[    5.454437] agpgart-intel 0000:00:00.0: detected 131072K stolen memory
[    5.833552] [drm] Memory usable by graphics device = 2048M
[    5.834040] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    6.314756] ieee80211 phy0: Atheros AR9280 Rev:2 mem=0xf8660000, irq=17