johnsfine |
05-25-2008 07:53 AM |
Quote:
Originally Posted by ezrider
(Post 3163684)
I looked for "pae" & I see it when I cat /proc/cpuinfo
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cpuinfo is info about your cpu, not info about your kernel. You just verified your CPU supports PAE (I think it has been a long time since they made any x86 CPU that doesn't). To use PAE, you need both the CPU and the kernel to support it.
Quote:
two of the early boot messages are "Warning only 4GB will be used" & "Use a HIGHMEM64G enabled kernel."
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Meaning your kernel doesn't support PAE. As others have told you, HIGHMEM64G is one of the names for kernel support of PAE.
Quote:
Does that means my only option is to go to a 64 bit kernel (e.g., FC9)?
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No. It doesn't even tell you whether a 64 bit kernel is an option (the lm bit in the flags in cpuinfo would tell you whether your CPU would support a 64 bit kernel).
Assuming your CPU supports it, a 64 bit kernel is one option. Depending on what mix of applications you run on that system, there might be some significant advantage to a 64 bit kernel over a 32 bit HIGHMEM64G kernel. Or there might be a small advantage to HIGHMEM64G over 64 bit. Or more likely, there would be no significant difference.
From what you have now, switching just the kernel (to HIGHMEM64G) is a smaller change. If you can't find the kernel you want pre built, building it isn't very hard.
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