Messages in this thread | | | From | (Linus Torvalds) | Subject | Re: Variability in cache access times | Date | 28 Jan 1999 18:55:15 GMT |
| |
In article <199901281631.QAA03159@dax.scot.redhat.com>, Stephen C. Tweedie <sct@redhat.com> wrote: > >As far as the Intel CPU is concerned, it is not particularly hard. The >real problem as far as Linux itself is concerned is twofold: first, it >requires contiguous 4MB pages, and secondly Linux assumes a uniform, >fixed-depth page table hierarchy.
Actually, the latter I already did at one point (it worked well - I made sure that the page mapping functions worked in kernel space too, even though all 1:1-mapped kernel pages used 4M addressing).
I removed this simply because there wasn't enough use for it, and it complicated the code slightly (not much, but considering that nobody used it it wasn't worth maintaining).
Linus
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |