| Date | Wed, 2 May 2001 12:53:50 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: X15 alpha release: as fast as TUX but in user space (fwd) |
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On Wed, 2 May 2001, Andi Kleen wrote:
> > Whatever happened to that hack that was discussed a year or two ago? > > The one where (also on IA32) a magic page was set up by the kernel > > containing code for fast system calls, and the kernel would write > > calibation information to that magic page. The code written there > > would use the TSC in conjunction with that calibration data. > > > > There was much discussion about this idea, even Linus was keen on > > it. But IIRC, nothing ever happened. > > It's already implemented in the x86-64 port, thanks to Andrea > Arcangelli.
well, it was first prototyped in the vsyscall patches :-)
Ingo
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