don't retry interrupt on lost requests

fuse/opcode.go

@@ -12,7 +12,6 @@ import (
 	"runtime"
 	"runtime/debug"
 	"syscall"
-	"time"
 	"unsafe"
 )
 
@@ -552,22 +551,18 @@ func doCopyFileRange(server *Server, req *request) {
 
 func doInterrupt(server *Server, req *request) {
 	input := (*InterruptIn)(req.inData)
-	server.reqMu.Lock()
 	defer server.reqMu.Unlock()
-
-	// This is slow, but this operation is rare.
+	server.reqMu.Lock()
 	for _, inflight := range server.reqInflight {
-		if input.Unique == inflight.inHeader.Unique && !inflight.interrupted {
-			close(inflight.cancel)
-			inflight.interrupted = true
-			req.status = OK
-			return
+		if input.Unique == inflight.inHeader.Unique {
+			if !inflight.interrupted {
+				close(inflight.cancel)
+				inflight.interrupted = true
+			}
 		}
 	}
 
-	// not found; wait for a bit
-	time.Sleep(10 * time.Microsecond)
-	req.status = EAGAIN
+	req.status = OK
 }
 
 ////////////////////////////////////////////////////////////////