Add comment explaining the change

elastic · Dec 6, 2021 · e835ec4 · e835ec4
1 parent 0b7bf4f
commit e835ec4
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/dev-tools/mage/common.go b/dev-tools/mage/common.go
@@ -528,6 +528,8 @@ func numParallel() int {
 	maxParallel := runtime.NumCPU()
 
 	info, err := GetDockerInfo()
+	// Check that info.NCPU != 0 since docker info doesn't return with an
+	// error status if communcation with the daemon failed.
 	if err == nil && info.NCPU != 0 && info.NCPU < maxParallel {
 		maxParallel = info.NCPU
 	}