Messages in this thread | | | Date | Tue, 29 Jan 2002 18:20:44 -0600 (CST) | From | Oliver Xymoron <> | Subject | Re: [PATCH] per-cpu areas for 2.5.3-pre6 |
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On Tue, 29 Jan 2002, Linus Torvalds wrote:
> 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. > > 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).
Yes, obviously.
Nearly as good would be replacing the current logic for figuring out the current processor id through current with logic to access the per-cpu data. The primary use of that id is indexing that data anyway.
-- "Love the dolphins," she advised him. "Write by W.A.S.T.E.."
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