RFR: Barriers for locks rewrite

[Aleksey Shipilev]

On 10/10/2016 10:14 AM, Roman Kennke wrote:
> http://cr.openjdk.java.net/~rkennke/lockbarriers/webrev.00/

I agree, this strikes right at the core where mark word is modified, not
spread all around.

Minor nit:

 *) I think jccb(...) should be replaced with jcc(..., true // maybe_short)

Thanks,
-Aleksey