[aarch64-port-dev ] AARCH64 stage: next steps

[Andrew Haley]

On 01/22/2015 10:12 AM, David Holmes wrote:
> Yes this is a badly documented flag. While originally (when we only had 
> TSO systems) it allowed you to switch between the memory serialization 
> pseudo-membar trick and full membars/fences,  you need UseMembar for any 
> platform for which the memory serialization trick is not guaranteed to 
> work. As we have discussed before we consider that to be any non-TSO 
> platform, but PPC64 decided otherwise (did Aarch64 do the same?). :)

UseMembar is enabled by default on AArch64.  Despite reading the code
for some time I've been unable to figure out how the serialization page
is supposed to work.

Andrew.