[TUHS] Irix on MIPS -- was kernel mode paged

Warner Losh imp at bsdimp.com
Fri Nov 22 13:24:04 AEST 2019

On Thu, Nov 21, 2019, 2:12 PM ron minnich <rminnich at gmail.com> wrote:

> I'm looking for a reference to any Unix ports where the kernel ran in
> a non-paged address space and  user mode was paged. I could swear this
> was done at some point, and memory says it was on a soft-TLB system
> like the MIPS, to avoid TLB pollution and TLB fault overhead.
> But maybe I'm nuts. I am happy to hear either answer.

Mips had KSEG0 which didn't go through TLB and was mapped to physical
memory.  Some MIPS kernels ran in this space to avoid TLB issues...


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