On Tue, 10 Jan 2006, Jens Axboe wrote:
yes, i made it totally configurable in 2.4 days: 1:3, 2/2 and 3:1 splits
were possible. It was a larger patch to enable all this across x86, but
the Kconfig portion was removed a bit later because people _frequently_
misconfigured their kernels and then complained about the results.
How is this different than all other sorts of misconfigurations? As far
as I can tell, the biggest "problem" for some is if they depend on some
binary module that will of course break with a different page offset.
For simplicity, I didn't add more than the 2/2 split, where we could add
even a 3/1 kernel/user or a 0.5/3.5 (I think sles8 had this).
I prefer setting __PAGE_OFFSET to (0x78000000) on machines with 2GB of RAM.
This seems to let the kernel use the full 2GB of memory, rather than just
1920-1984 MB (at least back in 2.4 days).
-Byron
--
Byron Stanoszek Ph: (330) 644-3059
Systems Programmer Fax: (330) 644-8110
Commercial Timesharing Inc. Email: [email protected]
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