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SubjectRe: How to use >3G memory per process
Followup to:  <>
By author: Wayne Whitney <>
In newsgroup:
> In mailing-lists.linux-kernel, you wrote:
> > [1] What need to be done for the kernel to support 3.5G or more user
> > address space per process?
> On ia32, change the value of __PAGE_OFFSET (where kernel space starts)
> in include/asm-i386/page.h. The size of kernel space must be a power
> of 2, so you can change __PAGE_OFFSET from its default of 0xC0000000
> to either 0xE0000000 (reasonable) or 0xF0000000 (overboard ?).
> You must also change the unlabeled value near the top of
> arch/i386/ to match the value of __PAGE_OFFSET.

Note that this does break the (old) initrd protocol. Compile your
kernel monolithic.

<> at work, <> in private!
"Unix gives you enough rope to shoot yourself in the foot." <>
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