[solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

thoand · 2010-09-08 17:39:32

Hi,

after I updated to the newest kernel build (I think before I was on 2.6.35.X) free shows me only 3073M, before it was something around 8000.
In the BIOS it shows 8096 M installed.

Anyone any idea?

kind regards,
thoand

Last edited by thoand (2010-09-08 20:43:30)

lilsirecho · 2010-09-08 18:33:02

Assume you have x86_64 system? If not, the limit in i686 is ~3GB.

thoand · 2010-09-08 18:36:43

uname -a tells me:
Linux terra 2.6.35-ARCH #1 SMP PREEMPT Fri Aug 27 17:14:28 CEST 2010 x86_64 Intel(R) Core(TM) i7 CPU Q 820 @ 1.73GHz GenuineIntel GNU/Linux

so I suggest it is 64Bit and it worked before.

systemservers · 2010-09-08 18:41:12

tempfs size?

lilsirecho · 2010-09-08 18:41:26

Try re-installing the kernel...........

thoand · 2010-09-08 18:51:45

@systemservers:

[thoand@terra ~]$ df -h
Dateisystem           Size  Used Avail Use% Eingehängt auf
udev                   10M  236K  9,8M   3% /dev
/dev/sda4             219G  150G   58G  73% /
shm                   1,6G     0  1,6G   0% /dev/shm

@lilsirecho: that was the first thing I tried, but it did not change anything

Last edited by thoand (2010-09-08 19:01:46)

lilsirecho · 2010-09-08 18:57:59

I assume free -m shows the discrepancy....................

thoand · 2010-09-08 19:00:36

[thoand@terra ~]$ free -m
             total       used       free     shared    buffers     cached
Mem:          3073       3051         22          0          2        437
-/+ buffers/cache:       2611        462
Swap:         2052        375       1676

I see only 3GB there, am I wrong?

Last edited by thoand (2010-09-08 19:01:28)

lilsirecho · 2010-09-08 19:12:01

Frustrating!...Only 22MB free of 3GB....

Perhaps a re-install from a different mirror will give better response.

Since the bios identifies 8GB, and I assume that is 4 2GB sticks, the ram is ide;d ok.

Can only be a lack of 64bit high mem in the kernel enable.

With that small free-m your system has to hang or run slow in swap.

Inxsible · 2010-09-08 19:15:39

lilsirecho wrote:

Frustrating!...Only 22MB free of 3GB....With that small free-m your system has to hang or run slow in swap.

But 2611 is in cache, so its not that the swap is being hit hard.Using all the memory you have is a good thing.

lilsirecho · 2010-09-08 19:19:26

Noted the cache but the total displayed is still way low....

Perhaps /proc/meminfo holds some clue.

thoand · 2010-09-08 19:32:55

lilsirecho I have two 4GB modules.

I tried to downgrade the kernel (sudo pacman -U http://arm.konnichi.com/core/os/x86_64/ … kg.tar.xz), but it has too much dependencies:

[thoand@terra ~]$ sudo pacman -U [url]http://arm.konnichi.com/core/os/x86_64/kernel26-2.6.34.3-1-x86_64.pkg.tar.xz[/url]
 kernel26-2.6.34.3-1-x86_64                                                   22,8M  324,2K/s 00:01:12 [############################################################] 100%
Löse Abhängigkeiten auf...
Suche nach Zwischen-Konflikten...
Fehler: Konnte den Vorgang (Kann Abhängigkeiten nicht erfüllen) nicht vorbereiten
:: aufs2: benötigt kernel26>=2.6.35
:: madwifi: benötigt kernel26>=2.6.35
:: ndiswrapper: benötigt kernel26>=2.6.35
:: nvidia: benötigt kernel26>=2.6.35
:: tiacx: benötigt kernel26>=2.6.35
:: vhba-module: benötigt kernel26>=2.6.35
[thoand@terra ~]$

meminfo gave me:

[thoand@terra ARM]$ cat /proc/meminfo
MemTotal:        3147548 kB
MemFree:          676176 kB
Buffers:           71376 kB
Cached:          1237720 kB
SwapCached:        67524 kB
Active:          1052996 kB
Inactive:        1185204 kB
Active(anon):     568588 kB
Inactive(anon):   362016 kB
Active(file):     484408 kB
Inactive(file):   823188 kB
Unevictable:           0 kB
Mlocked:               0 kB
SwapTotal:       2101676 kB
SwapFree:        1805128 kB
Dirty:              6664 kB
Writeback:             0 kB
AnonPages:        888364 kB
Mapped:           110116 kB
Shmem:              1480 kB
Slab:              79976 kB
SReclaimable:      52700 kB
SUnreclaim:        27276 kB
KernelStack:        3520 kB
PageTables:        38152 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     3675448 kB
Committed_AS:    2977804 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      299656 kB
VmallocChunk:   34359414780 kB
HardwareCorrupted:     0 kB
DirectMap4k:      458752 kB
DirectMap2M:     2752512 kB

I also tried to use the main repo (Server = ftp://ftp.archlinux.org/$repo/os/x86_64) but there was now new/different kernel.

lilsirecho · 2010-09-08 19:42:09

My assumption corrected!!

With 4GB modules and dual core, maybe only one core is enabled?

lilsirecho · 2010-09-08 20:07:56

Perhaps the i7 system is the cause of the problem/ Please excuse my reference to dual core.

I understand that i7 core system has problems and this may be one of them.

Best to google i7 on the internet perhaps. The i5 core system is mostly recommended.

I pass on all i7 items...

Good luck.

thoand · 2010-09-08 20:16:59

top shows me all cores.

top - 22:14:51 up  2:49,  2 users,  load average: 1.23, 1.34, 1.31
Tasks: 236 total,   1 running, 235 sleeping,   0 stopped,   0 zombie
Cpu0  :  8.6%us,  2.3%sy,  0.0%ni, 87.4%id,  1.7%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu1  :  9.6%us,  1.6%sy,  0.3%ni, 86.6%id,  1.9%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu2  :  5.3%us,  0.0%sy,  0.0%ni, 94.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu3  :  1.6%us,  0.3%sy,  0.0%ni, 98.1%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu4  :  1.3%us,  0.3%sy,  0.3%ni, 90.7%id,  7.3%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu5  :  0.7%us,  0.3%sy,  0.0%ni, 99.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Cpu6  :  3.0%us,  3.3%sy,  0.3%ni, 92.7%id,  0.3%wa,  0.0%hi,  0.3%si,  0.0%st
Cpu7  :  0.3%us,  0.0%sy,  0.0%ni, 99.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   3147548k total,  2706096k used,   441452k free,    31756k buffers
Swap:  2101676k total,   290900k used,  1810776k free,  1415284k cached

thoand · 2010-09-08 20:43:06

@lilsirecho: thank you, you brought me in the right direction

[thoand@terra ~]$ free -m
             total       used       free     shared    buffers     cached
Mem:          7925       1692       6232          0         77        640
-/+ buffers/cache:        973       6951
Swap:         2052          0       2052

what happened? Today was an IBM technican at my place and replaced the mainboard in my Thinkpad W510 (Type 4319-4NG), it had a BIOS in Version 1.20 installed. I tought a "new" mainboard has the current BIOS installed...
I ran Lenovo System Update an it updated my BIOS to version 1.27, back on archlinux I had my full memory!

thanks for your help

lilsirecho · 2010-09-08 21:12:03

Weird! Bios reports correct level of ram but doesn't act like it! What a crap for bios that was!!!

Cheers......

Arch Linux

#1 2010-09-08 17:39:32

[solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#2 2010-09-08 18:33:02

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#3 2010-09-08 18:36:43

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#4 2010-09-08 18:41:12

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#5 2010-09-08 18:41:26

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#6 2010-09-08 18:51:45

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#7 2010-09-08 18:57:59

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#8 2010-09-08 19:00:36

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#9 2010-09-08 19:12:01

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#10 2010-09-08 19:15:39

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#11 2010-09-08 19:19:26

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#12 2010-09-08 19:32:55

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#13 2010-09-08 19:42:09

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#14 2010-09-08 20:07:56

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#15 2010-09-08 20:16:59

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#16 2010-09-08 20:43:06

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

#17 2010-09-08 21:12:03

Re: [solved] kernel26 2.6.35.4-1 x86_64 only detects 3GB of RAM

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