Maximum Memory PER PROCESS
I've been trying to clarify how much memory per process is available using Linux and 64bit processors like the Opteron or the Itanium2. Even if Linux supports 64Gb or RAM, if you've got apps that need more than 3GB per process and you're on x86, then you're out of luck. I've got some such applications, that require more than 3GB per process. So I'm currently "out of luck". It doesn't matter that my machines have 8Gb+ ram. 3GB per process is the max on these x86 boxes.
I've gotten my hands on an Itanium2 box, and I'm currently waiting for 8GB of RAM to arrive. Soon I will know the answer, but in the meantime I am trying to find out from anyone who knows for sure, whether or not 64bit processors raise the bar on maximum memory "per process" and allow processes to use more than the 3GB per process max.
Can I stick with 2.4 kernel and my Itanium2 or Opteron box, or do I need to use 2.6 to get beyond the 3GB per process max?
The closest answer I've gotten so far was from a guy named John-Paul Stewart, who demanded I look at TASK_SIZE in /usr/src/linux/include/asm-x86_64/processor.h instead of just telling me how much memory per process was supported.
Hint: I'm not entirely sure what the TASK_SIZE is supposed to represent, so I still do not know that answer to my question - "How much memory per process is allowed with kernel 2.4 running on Itanium2 processor".