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Old 11-03-2011, 06:46 AM
George R Goffe
 
Default kernel/system can't see all 4G memory

Hi,
My question is, am I missing something here?
I upgraded my lenovo 60t to 4G memory and don't seem to be able to see all 4G of the upgrade.
The hardware spec for this machine says it supports 4G memory.
Any hints/clues/tips would be GREATLY appreciated.
Thanks,
George...
uname says: 2.6.35.14-100.fc14.x86_64 #1 SMP Fri Oct 21 18:40:08 UTC 2011 x86_64 GNU/Linux

cat /proc/meminfo says:
MemTotal:******* 3090228 kB
MemFree:********* 531148
kB
Buffers:********** 66672 kB
Cached:********** 945684 kB
SwapCached:******* 58032 kB
Active:********* 1318288 kB
Inactive:******** 896312 kB
Active(anon):**** 915732 kB
Inactive(anon):** 289888 kB
Active(file):**** 402556 kB
Inactive(file):** 606424 kB
Unevictable:********* 68 kB
Mlocked:************* 68 kB
SwapTotal:****** 3145724 kB
SwapFree:******* 2751508 kB
Dirty:*********** 143324
kB
Writeback:******** 15820 kB
AnonPages:****** 1183460 kB
Mapped:*********** 76600 kB
Shmem:************* 3376 kB
Slab:************ 147820 kB
SReclaimable:***** 90724 kB
SUnreclaim:******* 57096 kB
KernelStack:******* 3600 kB
PageTables:******* 65096 kB
NFS_Unstable:********* 0 kB
Bounce:*************** 0 kB
WritebackTmp:********* 0 kB
CommitLimit:**** 4690836
kB
Committed_AS:*** 2884068 kB
VmallocTotal:** 34359738367 kB
VmallocUsed:***** 113596 kB
VmallocChunk:** 34359610520 kB
HardwareCorrupted:**** 0 kB
HugePages_Total:****** 0
HugePages_Free:******* 0
HugePages_Rsvd:******* 0
HugePages_Surp:******* 0
Hugepagesize:****** 2048 kB
DirectMap4k:**** 2843456 kB
DirectMap2M:***** 301056 kB


"It's not what you know that hurts you, It's what you know that ain't so." Wil Rogers... Wil would say, "STIFF THE FED"!!!--
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Old 11-03-2011, 07:08 AM
Frank Elsner
 
Default kernel/system can't see all 4G memory

On Thu, 3 Nov 2011 00:46:15 -0700 (PDT) George R Goffe wrote:
> Hi,
>
> My question is, am I missing something here?
>
> I upgraded my lenovo 60t to 4G memory and don't seem to be able to see all 4G of the upgrade.
>
>
> The hardware spec for this machine says it supports 4G memory.
>
> Any hints/clues/tips would be GREATLY appreciated.


You should use the PAE version of the kernel.


--Frank Elsner
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Old 11-03-2011, 07:13 AM
Frank Murphy
 
Default kernel/system can't see all 4G memory

On 03/11/11 08:08, Frank Elsner wrote:
<snipped>
>> The hardware spec for this machine says it supports 4G memory.
>>
>> Any hints/clues/tips would be GREATLY appreciated.
>
>
> You should use the PAE version of the kernel.
>
>
> --Frank Elsner


He's on 64bit kernel-PAE is for 32bit.


--
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Frank Murphy
UTF_8 Encoded
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Old 11-03-2011, 07:16 AM
Frank Cox
 
Default kernel/system can't see all 4G memory

On Thu, 3 Nov 2011 00:46:15 -0700 (PDT)
George R Goffe wrote:

> I upgraded my lenovo 60t to 4G memory and don't seem to be able to see all 4G
> of the upgrade.

How much memory does your machine's bios screen tell you it has?

--
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www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER!
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Old 11-03-2011, 07:39 AM
George R Goffe
 
Default kernel/system can't see all 4G memory

Frank,
Thanks for your response.
The bios reports 4096MB.

George...
*"It's not what you know that hurts you, It's what you know that ain't so." Wil Rogers... Wil would say, "STIFF THE FED"!!!
From: Frank Cox <theatre@sasktel.net>
To: users@lists.fedoraproject.org
Cc: George R Goffe
<grgoffe@yahoo.com>
Sent: Thursday, November 3, 2011 1:16 AM
Subject: Re: kernel/system can't see all 4G memory


On Thu, 3 Nov 2011 00:46:15 -0700 (PDT)
George R Goffe wrote:

> I upgraded my lenovo 60t to 4G memory and don't seem to be able to see all 4G
> of the upgrade.

How much memory does your machine's bios screen tell you it has?

--
MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com
www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER!


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Old 11-03-2011, 08:04 AM
"DRSp."
 
Default kernel/system can't see all 4G memory

Am Donnerstag, den 03.11.2011, 00:46 -0700 schrieb George R Goffe:
> Hi,
>
>
> My question is, am I missing something here?
>
>
> I upgraded my lenovo 60t to 4G memory and don't seem to be able to see
> all 4G of the upgrade.
>
>
> The hardware spec for this machine says it supports 4G memory.
>
>
> Any hints/clues/tips would be GREATLY appreciated.
>
>
> Thanks,
>
>
> George...
>
>
> uname says: 2.6.35.14-100.fc14.x86_64 #1 SMP Fri Oct 21 18:40:08 UTC
> 2011 x86_64 GNU/Linux
>
>
>
> cat /proc/meminfo says:
>
> MemTotal: 3090228 kB
> MemFree: 531148 kB
> Buffers: 66672 kB
> Cached: 945684 kB
> SwapCached: 58032 kB
> Active: 1318288 kB
> Inactive: 896312 kB
> Active(anon): 915732 kB
> Inactive(anon): 289888 kB
> Active(file): 402556 kB
> Inactive(file): 606424 kB
> Unevictable: 68 kB
> Mlocked: 68 kB
> SwapTotal: 3145724 kB
> SwapFree: 2751508 kB
> Dirty: 143324 kB
> Writeback: 15820 kB
> AnonPages: 1183460 kB
> Mapped: 76600 kB
> Shmem: 3376 kB
> Slab: 147820 kB
> SReclaimable: 90724 kB
> SUnreclaim: 57096 kB
> KernelStack: 3600 kB
> PageTables: 65096 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> WritebackTmp: 0 kB
> CommitLimit: 4690836 kB
> Committed_AS: 2884068 kB
> VmallocTotal: 34359738367 kB
> VmallocUsed: 113596 kB
> VmallocChunk: 34359610520 kB
> HardwareCorrupted: 0 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 2048 kB
> DirectMap4k: 2843456 kB
> DirectMap2M: 301056 kB
>
>
>
>
>
> "It's not what you know that hurts you, It's what you know that ain't
> so." Wil Rogers... Wil would say, "STIFF THE FED"!!!

shared grafic-card - perhaps? didn't google the specs of your
lenovo-t60...
--
Q: What do you do with an elephant with three balls? A: Walk him and
pitch to the rhino.

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Old 11-03-2011, 09:40 AM
Roberto Ragusa
 
Default kernel/system can't see all 4G memory

On 11/03/2011 08:46 AM, George R Goffe wrote:
> Hi,
>
> My question is, am I missing something here?
>
> I upgraded my lenovo 60t to 4G memory and don't seem to be able to see all 4G of the upgrade.
>
> The hardware spec for this machine says it supports 4G memory.
>
> Any hints/clues/tips would be GREATLY appreciated.

x86_64, so something is happening at the hardware level (shared VGA?)
or BIOS level (wrong config, bugs).

What do you get with this command?

grep 'BIOS-e820' /var/log/dmesg

it will show how the memory areas have been described by the BIOS.


--
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Old 11-03-2011, 12:12 PM
"Michael D. Setzer II"
 
Default kernel/system can't see all 4G memory

On 3 Nov 2011 at 11:40, Roberto Ragusa wrote:

Date sent: Thu, 03 Nov 2011 11:40:44 +0100
From: Roberto Ragusa <mail@robertoragusa.it>
To: George R Goffe <grgoffe@yahoo.com>,
Community support for Fedora users
<users@lists.fedoraproject.org>
Subject: Re: kernel/system can't see all 4G memory
Send reply to: Community support for Fedora users
<users@lists.fedoraproject.org>

<mailto:users-request@lists.fedoraproject.org?subject=unsubscrib
e>

<mailto:users-request@lists.fedoraproject.org?subject=subscribe
>

> On 11/03/2011 08:46 AM, George R Goffe wrote:
> > Hi,
> >
> > My question is, am I missing something here?
> >
> > I upgraded my lenovo 60t to 4G memory and don't seem to be able to
> > see all 4G of the upgrade.
> >
> > The hardware spec for this machine says it supports 4G memory.
> >
> > Any hints/clues/tips would be GREATLY appreciated.
>
> x86_64, so something is happening at the hardware level (shared VGA?)
> or BIOS level (wrong config, bugs).
>
> What do you get with this command?
>
> grep 'BIOS-e820' /var/log/dmesg
>
> it will show how the memory areas have been described by the BIOS.
>

Might be interesting to install memtest86+ and then run
memtest-setup to add it as an option to grub.

Then restart the system, and select the memtest option.

Sometimes I've had to change the grub.conf lines for memtest,
but don't recall what needed to be changed, but this is what I have
in mine at the moment.

title Memtest86+ (4.20)
root (hd0,0)
kernel /memtest86+-4.20



>
> --
> Roberto Ragusa mail at robertoragusa.it
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+----------------------------------------------------------+
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Guam Community College Computer Center
mailto:mikes@kuentos.guam.net
mailto:msetzerii@gmail.com
http://www.guam.net/home/mikes
Guam - Where America's Day Begins
G4L Disk Imaging Project maintainer
http://sourceforge.net/projects/g4l/
+----------------------------------------------------------+

http://setiathome.berkeley.edu (Original)
Number of Seti Units Returned: 19,471
Processing time: 32 years, 290 days, 12 hours, 58 minutes
(Total Hours: 287,489)

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Old 11-03-2011, 12:38 PM
Lamar Owen
 
Default kernel/system can't see all 4G memory

On Nov 3, 2011, at 3:46 AM, George R Goffe wrote:
I upgraded my lenovo 60t to 4G memory and don't seem to be able to
see all 4G of the upgrade.


The hardware spec for this machine says it supports 4G memory.

Any hints/clues/tips would be GREATLY appreciated.


It is a hardware limitation in the 945M chipset; the chipset
physically only has 32 address lines, and the PCI/PCI-e memory map has
to go somewhere. That 'somewhere' is typically the top 1GB of address
space, leaving 3GB (give or take) available for RAM. If you don't
have that 33rd address line, you can't go above the 32-bit barrier PAE
or 64 bit regardless.


Same thing is true in my Dell Precision M65, although the Dell BIOS
squeezes a little more out of it, 3.5GB or so is what I get with 4GB
of RAM installed, and the 64-bit kernel, Fedora 14.


The 965 chipset fixes this by adding physical address lines to the
chipset and adding remapping support in hardware.


In the Dell case, the Precision M65 is virtually the same machine as a
Latitude D820; both have the 945; the Latitude D830 and equivalent
Precision model have the 965, and can address all 4GB of RAM and can
map the RAM that is displaced by the PCI/PCI-e address space above the
4GB (32-bit) line. (If your BIOS has 'PCI Memory Hole Remapping'
support you can try that; see http://en.wikipedia.org/wiki/PCI_hole
for more information. But this won't help go above the 32-bit
addressing barrier if the chipset physically only has 32-bits of
addressing capacity, regardless of processor installed.


Again, neither PAE nor 64-bit OS will help since the 945 chipset
physically does not have a 33rd (and above) address line, so the PCI/
PCI-e memory map has to go somewhere in the 4GB (32-bit) address
space, taking away from the 4GB of installed RAM.


Please also see http://www.dansdata.com/askdan00015.htm

and

http://www.linuxquestions.org/questions/linux-hardware-18/intel-945-chipset-and-4gb-of-memory-578912/

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Old 11-03-2011, 03:13 PM
George R Goffe
 
Default kernel/system can't see all 4G memory

Roberto,
I grasp the concept of reserved memory but do not understand what it's used for or what the ramifications are.
Memory reserved from 4g for the driver?
Hmmm. It looks like that last value at the bottom goes up to 4g. Is this the culprit?
I'm not doing anything special with graphics... that I know of.

Here's what I get from your command.
Regards,
George...
grep 'BIOS-e820' /var/log/dmesg
[***
0.000000]* BIOS-e820: 0000000000000000 - 000000000009f000 (usable)
[*** 0.000000]* BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000000d2000 - 00000000000d4000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000000dc000 - 0000000000100000 (reserved)
[*** 0.000000]* BIOS-e820: 0000000000100000 - 00000000bfed0000 (usable)
[*** 0.000000]* BIOS-e820: 00000000bfed0000 - 00000000bfedf000 (ACPI data)
[*** 0.000000]* BIOS-e820: 00000000bfedf000 - 00000000bff00000 (ACPI NVS)
[*** 0.000000]* BIOS-e820: 00000000bff00000 - 00000000c0000000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000f0000000 - 00000000f4000000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
[***
0.000000]* BIOS-e820: 00000000fed00000 - 00000000fed00400 (reserved)
[*** 0.000000]* BIOS-e820: 00000000fed14000 - 00000000fed1a000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000fed1c000 - 00000000fed90000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
[*** 0.000000]* BIOS-e820: 00000000ff800000 - 0000000100000000 (reserved)
*"It's not what you know that hurts you, It's what you know that ain't so." Wil Rogers... Wil would say, "STIFF THE FED"!!!
From: Roberto Ragusa <mail@robertoragusa.it>
To: George R Goffe <grgoffe@yahoo.com>; Community support for Fedora users <users@lists.fedoraproject.org>
Sent: Thursday, November 3, 2011 3:40 AM
Subject: Re: kernel/system can't see all 4G memory


On 11/03/2011 08:46 AM, George R Goffe wrote:
> Hi,
>
> My question is, am I missing something here?
>
> I upgraded my lenovo 60t to 4G memory and don't seem to be able to see all 4G of the upgrade.
>
> The hardware spec for this machine says it supports 4G memory.
>
> Any hints/clues/tips would be GREATLY appreciated.

x86_64, so something is happening at the hardware level (shared VGA?)
or BIOS level (wrong config, bugs).

What do you get with this command?

* grep 'BIOS-e820' /var/log/dmesg

it will show how the memory areas have been described by the BIOS.


--
* Roberto Ragusa* * mail at robertoragusa.it


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