Messages in this thread | | | Date | Tue, 29 Jan 2002 15:36:57 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [PATCH] per-cpu areas for 2.5.3-pre6 |
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On Tue, 29 Jan 2002, Oliver Xymoron wrote: > > Seems like we could do slightly better to have these local areas mapped to > the same virtual address on each processor, which does away with the need > for an entire level of indirection.
No no no.
That is a really stupid idea, even though every single OS developer has at some time thought that it was the great idea (and it shows up in a lot of OS's).
The reason it is a stupid idea is that if you do it, you can no longer share page tables between CPU's (unless all CPU's you support have TLB fill in software).
Linus
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