Messages in this thread | | | Date | Wed, 22 May 2002 16:13:06 +0200 | From | Pavel Machek <> | Subject | Re: AUDIT: copy_from_user is a deathtrap. |
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Hi!
> > I believe I seen some strange memcpy for PPro (or something that > > obscure) that done out-of-order accesses to trigger prefetch logic. I > > can't find it any more, so I can't be sure... > > Its festering quietly in the glibc source tree where all large and > dubiously justifiable hacks seem to end up
In such case, linus, here is your "reasonable" example. For PPro, it is faster to copy out-of-order, and if we wanted to use that for copy_to_user, you'd have your example. Pavel -- Casualities in World Trade Center: ~3k dead inside the building, cryptography in U.S.A. and free speech in Czech Republic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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