Review feedback

src/core/lib/iomgr/combiner.c

@@ -222,9 +222,8 @@ bool grpc_combiner_continue_exec_ctx(grpc_exec_ctx *exec_ctx) {
   if (contended && grpc_exec_ctx_ready_to_finish(exec_ctx) &&
       grpc_executor_is_threaded()) {
     GPR_TIMER_MARK("offload_from_finished_exec_ctx", 0);
-    // this execution context wants to move on, and we have a workqueue (and
+    // this execution context wants to move on: schedule remaining work to be
-    // so can help the execution context out): schedule remaining work to be
+    // picked up on the executor
-    // picked up on the workqueue
     queue_offload(exec_ctx, lock);
     GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return true;

src/core/lib/iomgr/executor.c

@@ -173,8 +173,8 @@ static void executor_push(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
   ts->depth++;
   bool try_new_thread = ts->depth > MAX_DEPTH &&
                         cur_thread_count < g_max_threads && !ts->shutdown;
+  gpr_mu_unlock(&ts->mu);
   if (try_new_thread && gpr_spinlock_trylock(&g_adding_thread_lock)) {
-    gpr_mu_unlock(&ts->mu);
     cur_thread_count = (size_t)gpr_atm_no_barrier_load(&g_cur_threads);
     if (cur_thread_count < g_max_threads) {
       gpr_atm_no_barrier_store(&g_cur_threads, cur_thread_count + 1);
@@ -185,8 +185,6 @@ static void executor_push(grpc_exec_ctx *exec_ctx, grpc_closure *closure,
                   &g_thread_state[cur_thread_count], &opt);
     }
     gpr_spinlock_unlock(&g_adding_thread_lock);
-  } else {
-    gpr_mu_unlock(&ts->mu);
   }
 }