Re: [PATCH] time: Add locking to xtime access in get_seconds()

Andi Kleen
2011-05-05T17:57:17Z

> I suspect the reason this hasn't been triggered on x86 or power6 is due
> to compiler or processor optimizations reordering the assignment to in
> effect make it atomic. Or maybe the timing window to see the issue is
> harder to observe?

On x86 all aligned stores are atomic. So I don't see how this
could be a problem ever.

Are you saying that on P6 only atomic stores are atomic?

If that's the case again I suspect other code will be affected
too.

-Andi
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