[aarch64-port-dev ] DMB elimination in C2 synchronization implementation

[Andrew Haley]

On 09/01/2015 04:06 PM, Wei Tang wrote:

> *Path1 & 2 - biased locking/unlocking*
> 
> Locking:
> 
> Path 1 - When the lock object is biased to current thread, DMB is
> un-necessary as current thread is holding the lock.

I don't agree.  A memory barrier is required for correct semantics.

I'll save any more comments until I see your patch.

Thanks,
Andrew.