Re: highmem question

Marvin Justice (mjustice@austin.rr.com)
Fri, 7 Dec 2001 20:10:24 -0600

> 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.

Marvin
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