[rhn-users] grub does not honor mem=xxxMrequest

[Benj FitzPatrick]

I believe bigmem is the default for AMD64 SMP, just like NUMA
is.  Also, as I said, I have 4 other computers which work just
fine with 4+ GB, so it is something with the memory remapping
on this mobo and the kernel.

---- Original message ----
>Date: Tue, 17 Jan 2006 05:27:01 -0800
>From: "Brian T. Brunner" <brian.t.brunner at gai-tronics.com>  
>Subject: Re: [rhn-users] grub does not honor mem=xxxMrequest  
>To: <rhn-users at redhat.com>
>
>
>IIRC the 3GB limit is there unless you're using a
BIGMEM-enabled kernel.
>More than 3GB may be seen by various places but won't be used
by the kernel.
>
>Brian Brunner
>brian.t.brunner at gai-tronics.com
>(610)796-5838
>
>>>> benjfitz at uchicago.edu 01/16/06 06:10PM >>>
>Okies, perhaps I should give a little more info.  I have 4
>other computers running RHEL 4.  1 with 8GB and 3 with 4GB,
>and none of these has this problem.  I looked at cat
>/proc/meminfo and it is seeing the same amount of RAM that
>grub is.  Any ideas?
>
>---- Original message ----
>>Date: Sat, 14 Jan 2006 08:12:01 -0500
>>From: jludwig <wralphie at comcast.net>  
>>Subject: Re: [rhn-users] grub does not honor mem=xxxM request  
>>To: Red Hat Network Users List <rhn-users at redhat.com>
>>
>>On Thursday 12 January 2006 17:14, Benj FitzPatrick wrote:
>>> I have a dual opteron 275 box (iwill dk8x and 8x512MB of
>>> reg/ecc pc3200) with RHEL 4 AS installed.  I have the latest
>>> kernel (2.6.9-22.0.1.ELsmp.  It shows 3.09GB of RAM in top.  I
>>> have changed the software and hardware memory remap functions
>>> in the BIOS and software on/hardware off gives 4096MB of NVRAM
>>> during POST.  However, top still shows 3.09GB (with and
>>> without mem=4096M in the boot line).  Am I using this option
>>> incorrectly or is there something else I can do?
>>>
>>> _______________________________________________
>>> rhn-users mailing list
>>> rhn-users at redhat.com 
>>> https://www.redhat.com/mailman/listinfo/rhn-users 
>>Apologies wrong icon -- mad mouse loose -- 
>>Had to check, but, /proc/meminfo should tell what the kernel
>is actually 
>>seeing. 
>>
>>I did not look at top but suspect it may have some
>limitations on its memory 
>>display unless it gets the information from /proc.
>>
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