Messages in this thread | | | From | (Linus Torvalds) | Subject | Re: Using %cr2 to reference "current" | Date | Tue, 6 Nov 2001 17:04:24 +0000 (UTC) |
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In article <E1613vx-00005r-00@the-village.bc.nu>, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: > >It may be. Likewise its not clear if %cr2 should hold current or a cpu ident >pointer (so you dont reload on switch of task). This needs more >benchmarking. Its in current -ac to verify the theory is correct not the >tuning.
We pretty much know the _theory_ is not correct, just by virtue of depending on non-architected behaviour. The only thing -ac can do is test whether it works in practice. Which is a totally different thing.
Especially on x86 chips.
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