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Old 06-17-2003, 10:49 AM   #1
Merlin53
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Registered: May 2003
Location: Dayton, Ohio
Distribution: Redhat/IRIX/Windows
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Unhappy Help!?! RH 8 Memory Mapping -High Memory-Virtural Memory issues..


I have 4 systems, dual P4 2.2GHz w/2G memory each. We have a VMIC Reflective Memory Card in each system, which acts like global shared memory to each system using a fiber ring for communication.
Using RH 7.1, I had to set a few things in the 'xconfig' to get the cards to work. "CONFIG_HIGHMEM4G=y" and I had to reduce the virtual memory from the automatic 3G down to 1G to get these cards mapped into the system.
Now with RH 8, there is no longer a setting to adjust the virtual memory, and since I have 2G physical memory, the memory mapping fills up to the max of 4G before my cards are ever seen.
If I add "mem=800MB" to the boot-up options the system will see the VMIC cards and they work fine. Otherwise the driver for the cards will not open the device because it cannot map/find the memory.
I have two other questions about this issue posted, 60 people have read them, no one has responded? I need to talk to someone that is savvy with the memory scheme of RH/Linux.....
Merlin53
 
Old 06-17-2003, 10:14 PM   #2
siddiqu
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Registered: Mar 2001
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Hi..

Post this question in the kernel.org

Siddiqu.T
 
Old 06-18-2003, 04:48 PM   #3
Merlin53
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Registered: May 2003
Location: Dayton, Ohio
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Thumbs up ...Success.....

Thanks for the ref to kernel.org, I searched several docs there and found a solution...

Thanks again,
Merlin53
 
  


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