RFR (M) [7u60]: Backport of JDK-8014555 G1: Memory ordering problem with Conc refinement and card marking

[Thomas Schatzl]

Hi Mikael,

On Tue, 2014-01-28 at 15:01 +0100, Mikael Gerdin wrote:
> Hi all,
> 
> Please review this backport for the introduction of the StoreLoad barrier into 
> G1's write barrier.
> 
> The patch from 8 does not apply cleanly to 7u60 since the MacroAssembler code 
> was broken out of assembler_*.[ch]pp into macroAssembler_*.[ch]pp.
> When I manually edited the patch file to apply the change to the assembler*-
> files the patch applies with a line offset so the code has not been changed, 
> just moved.
> 
> (this fix depends on JDK-8029335, however that change backports cleanly so as 
> per the process no extra code review is required for the backport.)

  as far as I can see it looks good.

Thomas