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Linus Torvalds wrote: > > On Tue, 10 Jan 2006, Jens Axboe wrote: > >>A newer version, trying to cater to the various comments in here. >>Changes: > > > Can we do one final cleanup? Do all the magic in _one_ place, namely the > x86 Kconfig file. > > Also, I don't think the NOHIGHMEM dependency is necessarily correct. A > 2G/2G split can be advantageous with a 16GB setup (you'll have more room > for dentries etc), but you obviously want to have HIGHMEM for that.. > > Do it something like this: > > choice > depends on EXPERIMENTAL > prompt "Memory split" > default DEFAULT_3G > help > Select the wanted split between kernel and user memory. > If the address range available to the kernel is less than the > physical memory installed, the remaining memory will be available > as "high memory". Accessing high memory is a little more costly > than low memory, as it needs to be mapped into the kernel first. > Note that selecting anything but the default 3G/1G split will make > your kernel incompatible with binary only modules. > > config DEFAULT_3G > bool "3G/1G user/kernel split" > config DEFAULT_3G_OPT > bool "3G/1G user/kernel split (for full 1G low memory)" > config DEFAULT_2G > bool "2G/2G user/kernel split" > config DEFAULT_1G > bool "1G/3G user/kernel split" > endchoice > > config PAGE_OFFSET > hex > default 0xC0000000 > default 0xB0000000 if DEFAULT_3G_OPT > default 0x78000000 if DEFAULT_2G > default 0x40000000 if DEFAULT_1G > > and then asm-i386/page.h can just do > > #define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET) > > and you're done. The non-1GB-aligned ones need to be disbarred when PAE is on, I think. M. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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