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SubjectRe: X15 alpha release: as fast as TUX but in user space (fwd)
Gregory Maxwell writes:
> Would it make sence to have libc use the magic page for all
> syscalls? Then on cpus with a fast syscall instruction, the magic
> page could contain the needed junk in userspace to use it.

That's pretty much what Linus suggested. He proposed having a new
syscall interface which was just calls into the magic page. All
syscalls would thus be available via the magic page. The kernel could
then selectively optimise individual syscalls (like gettimeofday(2))
or optimise the interface into kernel space, without libc ever having
to know about the details.


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