Re: [PATCH] ppc64: Fix possible race with set_pte on a present PTE

[David S. Miller]

On Tue, 25 May 2004 10:49:21 -0700 (PDT)
Linus Torvalds <torvalds@xxxxxxxx> wrote:

> So what I can tell, the fix is really something like this (this does both 
> x86 and ppc64 just to show how two different approaches would handle it, 
> but I have literally _tested_ neither).
> 
> What do people think?

So on sparc32 sun4m we'd implement ptep_update_dirty_accessed() with
some kind of loop using the swap instruction?  That's in fact what
I've always wanted, someway to easily integrate the usage of such
a loop so that we could handle this problem on such systems.

Keith?

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