cmd/containerd-shim, reaper: reduce channel allocation

stevvooe · stevvooe · commit 8cf32d34bb67 · 2018-01-24T16:04:57.000-08:00
Signed-off-by: Stephen J Day <stephen.day@docker.com> (cherry picked from commit 71e9f6d) Signed-off-by: Stephen J Day <stephen.day@docker.com>
diff --git a/cmd/containerd-shim/shim_linux.go b/cmd/containerd-shim/shim_linux.go
@@ -14,7 +14,7 @@ import (
 // setupSignals creates a new signal handler for all signals and sets the shim as a
 // sub-reaper so that the container processes are reparented
 func setupSignals() (chan os.Signal, error) {
-	signals := make(chan os.Signal, 2048)
+	signals := make(chan os.Signal, 32)
 	signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT, syscall.SIGCHLD)
 	// make sure runc is setup to use the monitor
 	// for waiting on processes
diff --git a/reaper/reaper.go b/reaper/reaper.go
@@ -15,7 +15,7 @@ import (
 // ErrNoSuchProcess is returned when the process no longer exists
 var ErrNoSuchProcess = errors.New("no such process")
 
-const bufferSize = 1024
+const bufferSize = 32
 
 // Reap should be called when the process receives an SIGCHLD.  Reap will reap
 // all exited processes and close their wait channels
