Messages in this thread | | | Date | Sat, 21 Oct 2006 11:29:14 +1000 | From | Paul Mackerras <> | Subject | Re: [PATCH 1/3] Fix COW D-cache aliasing on fork |
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Linus Torvalds writes:
> 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?
There is one PowerPC embedded chip family, the PPC440, which has a virtual i-cache with a process ID tag. The d-cache is sane though. Of course, the i-cache being readonly means we avoid the nastier issues.
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