System lockup problem with 7G of memory and PAE kernel - FC7

[Cokey]

Steve Siegfried wrote:
> Cokey wrote:
>> I have an older dual processor server with 4 Gig of memory that has been 
>> running FC5 since it was released.  I tried to upgraded to 7 Gig of 
>> memory under FC5 but the system locked up in the init phase regardless 
>> of what I did. I didn't chase the problem because I intended to upgrade
>> the OS.
>>
>> Recently I did upgrade the OS to F 7 and tried the changing the memory 
>> to 7 Gig again.  Using the standard i686 kernel, it boots and runs 
>> correctly, but warns that only 4 Gig of memory will be used and that the 
>> PAE kernel was necessary to use the full 7 Gig.
>>
>> I installed the 2.6.22.4-65.fc7PAE kernel and the system boots 
>> correctly, but stops at the init phase.  The system is not locked up as
>> it will respond to C-A-Del and reboot.  The output at the time of lock 
>> up looks like this:
>>
>> Switching to new root and running Init
>> Umounting old 	/dev
>> 		/proc
>> 		/sys
>> exec of init (/sbin/init) failed accessing a corrupted shared library
>> request_module: runaway loop modprobe binfmt-0397 (repeated 5 times)
>>
>> I ran the memory test on the system for 8 hours or so and it found  and 
>> tested all 7 Gig.  Also I have booted this system with M$ Advanced 
>> server and it finds/uses all 7 Gig so I don't think there's anything 
>> wrong with the hardware.
>>
>> Rebooting with the original i686 kernel works correctly.
>>
>> Any ideas or suggestions welcome.
>>
> 
> Have you verified that your kernel supports that much memory?  As I
> recall, there's a 2GB (or possibly 4GB) cut-off for "vanilla" kernels and
> if you want to run on a system with more memory than the cut-off allows,
> you'll need to set the "really large memory" option in the kernel's
> config file and then rebuild the kernel (or download the "large memory
> kernel" rpm from you usual RPM supplier).
> 
> Hope this helps'idly,
> 
> -S
> 
The std i686 kernel supports up to 4G of memory.  The 'PAE' kernel 
handles 4G and above.

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