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SubjectRe: sys_mmap2 on different architectures
From: Benjamin LaHaise <>
Date: Wed, 22 Feb 2006 19:14:11 -0500

> The sys_mmap2() ABI is that the page shift is always fixed to whatever
> page size is reasonable for the architecture, typically 2^12. The syscall
> should never be exposed as mmap2(), only as the large file size version
> of mmap() (aka mmap64()). The other consideration is that it should not
> be implemented in 64 bit ABIs, as those machines should be using a 64 bit
> native mmap(). Does that clear things up a bit? Cheers,

Aha, that part I didn't catch. Thanks for the clarification

I wonder why we did things that way with a fixed shift...
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