[PATCH] x86: Add an explicit barrier() to clflushopt()

[H. Peter Anvin]

On 01/07/16 11:44, Chris Wilson wrote:
> 
> Now I feel silly. Looking at the .s, there is no difference with the
> addition of the barrier to clflush_cache_range(). And sure enough
> letting the test run for longer, we see a failure. I fell for a placebo.
> 
> The failing assertion is always on the last cacheline and is always one
> value behind. Oh well, back to wondering where we miss the flush.
> -Chris
> 

Could you include the assembly here?

        -hpa