Hello,
As you have noticed i have just spoken in my previous posts
about the memory visibility problem, and to be able to understand
more , i will invite you to read this very interesting
paper that will make you understand much more:
Memory Barriers: a Hardware View for Software Hackers
http://www.rdrop.com/~paulmck/scalability/paper/whymb.2010.06.07c.pdf
Thank you,
Amine Moulay Ramdane.