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sync: update comment 

Comment update.

Change-Id: If0d054216f9953f42df04647b85c38008b85b026
GitHub-Last-Rev: 133b4670be
GitHub-Pull-Request: golang/go#31539
Reviewed-on: https://go-review.googlesource.com/c/go/+/172700
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Kai Dong 2019-04-19 03:23:23 +00:00 committed by Austin Clements
parent 4aeac68c92
commit 5ccaf2c6ad
1 changed files with 1 additions and 1 deletions
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2
src/sync/pool.go
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@ -194,7 +194,7 @@ func (p *Pool) getSlow(pid int) interface{} {
// Caller must call runtime_procUnpin() when done with the pool.
func (p *Pool) pin() (*poolLocal, int) {
pid := runtime_procPin()
// In pinSlow we store to localSize and then to local, here we load in opposite order.
// In pinSlow we store to local and then to localSize, here we load in opposite order.
// Since we've disabled preemption, GC cannot happen in between.
// Thus here we must observe local at least as large localSize.
// We can observe a newer/larger local, it is fine (we must observe its zero-initialized-ness).