Messages in this thread |  | | Date | Fri, 21 Sep 2001 00:46:40 +0000 | From | Pavel Machek <> | Subject | Re: Re[2]: [PATCH] Athlon bug stomper. Pls apply. |
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Hi!
> > It is _probably_ an undocumented performance thing, and clearing that > > bit may slow something down. But it might also change some behaviour, > > and knowing _what_ the behaviour is might be very useful for figuring > > out what it is that triggers the problem. > > AFAIK noone has even tested it yet to see what it does to performance! Eg > it might slow down memory access so that athlon-optimized memcopy is now > slower than non-athlon-optimized memcopy. And if it turns out to be the > case, we might as well just use the non-athlon-optimized memcopy instead > of twiddling undocumented northbridge bits...
And if someone does optimized copy in userspace, whole machine is dead?
Do you really wnt me to post bugtraq?
-- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
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