Messages in this thread | | | Date | Sat, 12 Feb 2000 16:02:11 -0800 | From | Richard Henderson <> | Subject | Re: 2.3.43 alpha broken with >2g of ram |
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On Sat, Feb 12, 2000 at 03:41:23PM -0800, Linus Torvalds wrote: > Richard, you do not seem to understand. > > The highmem approach gets everything right, and has basically zero > performance impact.
Apparently not. Yes, I can see that some could be avoided by taking care to allocate things properly, but I just can't see how you can get away from doing any copies at all.
> "all devices converted" is not even _close_ to true. You'll end up with > horrible configuration problems, where people don't even realize that one > of the drivers (or perhaps a module) isn't necessarily safe.
If the kernel compiles without virt_to_bus, it's safe. Which could be implied by the config option that enables >2GB.
r~
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