Summarizing various conversations I've seen:

The Go Memory Model says that "synchronization primitives" are in the sync and 
sync/atomic packages.  It also says that a "synchronization mechanism" 
establishes relative ordering as observed by another goroutine.  In other 
words, Go's atomics are full memory barriers/fences which guarantee sequential 
consistency for any number of goroutines.

John

    John Souvestre - New Orleans LA

-----Original Message-----
From: golang-nuts@googlegroups.com [mailto:golang-nuts@googlegroups.com] On 
Behalf Of Dave Cheney
Sent: 2017 October 22, Sun 15:22
To: golang-nuts
Subject: Re: [go-nuts] will the following code always print two 1?

Nope, as I understand it atomic load and store are not memory fencing 
operations.

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