>>That's because of highmem page bouncing when doing I/O. There is indeed
>>a solution for this -- 2.5 or 2.4 + block-highmem-all patches will
>>happily do I/O directly to any page in your system as long as your
>>hardware supports it. I'm sure we're beating w2k with that enabled :-)
>>
>
> Will your patch lead to better performance than the CONFIGH_HIGHMEM=n case?
> Unfortunately, W2K with any amount of memory beat Linux with no highmem (see
> http://www.uwsg.indiana.edu/hypermail/linux/kernel/0110.3/0375.html ) so my
> PHB decided to hold off on Linux for now.
>
Depends if you need the extra memory or not.
-hpa
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