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SubjectRe: [PATCH 1/3] Fix COW D-cache aliasing on fork
From: Linus Torvalds <>
Date: Fri, 20 Oct 2006 17:38:32 -0700 (PDT)

> I think (but may be mistaken) that ARM _does_ have pure virtual caches
> with a process ID, but people have always ended up flushing them at
> context switch simply because it just causes too much trouble.
> Sparc? VIPT too? Davem?

sun4c is VIVT, but has no SMP variants.
sun4m has both VIPT and PIPT.

> But it would be good to have something for the early -rc1 sequence for
> 2.6.20, and maybe the MIPS COW D$ patches are it, if it has performance
> advantages on MIPS that can also be translated to other virtual cache
> users..

I think it could help for sun4m highmem configs.
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