Re: X15 alpha release: as fast as TUX but in user space (fwd)

From: Richard Gooch (
Date: Sun Apr 29 2001 - 17:20:13 EST

Gregory Maxwell writes:
> On Sun, Apr 29, 2001 at 10:11:59PM +0200, Ingo Oeser wrote:
> [snip]
> > The point is: The code in that "magic page" that considers the
> > tradeoff is KERNEL code, which is designed to care about such
> > trade-offs for that machine. Glibc never knows this stuff and
> > shouldn't, because it is already bloated.
> >
> > We get the full win here, for our "compile the kernel for THIS
> > machine to get maximum performance"-strategy.
> >
> > People tend to compile the kernel, but not the glibc.
> >
> > Just let the benchmarks, Linus and Ulrich decide ;-)
> The kernel can even customize the page at runtime if it needs to, such as
> changing algorithims to deal with lock contention.
> Of course, this page will need to present a stable interface to
> glibc, and having both the code and a comprehensive jump-table might
> become tough in a single page...

Sure. IIRC, Linus talked about "a few pages".


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