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SubjectRe: Memory not being reported
David Ronis wrote:
> I don't think this is a 64bit capable box. Nonetheless, there are only
> 4G of memory, not more, and I still see 3G of it.

Can you post your dmesg output from bootup?

>
> David
>
>
>
> On Sat, 2009-01-24 at 02:37 -0600, Robert Hancock wrote:
>> David Ronis wrote:
>>> I'm running 2.6.28.1 on an i686 (slackware-12.1 for the most part) box.
>>> I recently added some extra memory, expanding from 2Gb to 4. Everything
>>> works as expected except that not all of the memory seems to be seen.
>>>
>>> free returns:
>>>
>>> total used free shared buffers
>>> cached
>>> Mem: 3374860 2099504 1275356 0 86612
>>> 1032024
>>> -/+ buffers/cache: 980868 2393992
>>> Swap: 497972 0 497972
>>>
>>>
>>> and cat /proc/meminfo gives:
>>>
>>> MemTotal: 3374860 kB
>>> MemFree: 1199184 kB
>>> Buffers: 86816 kB
>>> Cached: 1036240 kB
>>> SwapCached: 0 kB
>>> Active: 1375864 kB
>>>
>>> etc.
>>>
>>> On the other hand, user-space tools like lshw show the 4 1Gb DIMMS as
>>> does the BIOS configuration boot menu.
>>>
>>> One suspicion is that the configure option CONFIG_HIGHMEM4G=y
>>> should be unset and the CONFIG_HIGHMEM64G should be.
>> Yes, it should be. However, if your chipset doesn't support remapping
>> memory above the 4GB mark (some don't, and this is needed in this case
>> because various IO areas use up some of the address space below 4GB)
>> then it won't be possible to make use of any of that RAM.
>>
>> Note that when running with more than 4GB of RAM it's generally
>> preferable to run a 64-bit kernel if the machine supports it.
>>
>>> Any help would be appreciated, as would a separate CC since I don't
>>> subscribe to the list.
>>>
>>> Thanks in advance
>>>
>>> David
>>>
>


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