Messages in this thread | | | Date | Tue, 10 Jan 2006 14:47:43 +0100 | From | Jens Axboe <> | Subject | Re: 2G memory split |
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On Tue, Jan 10 2006, Byron Stanoszek wrote: > 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).
That might indeed be a good idea for 2G/2G, in the same sense that 0xC0000000 is a silly default because of the many 1G machines out there.
-- Jens Axboe
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