[Qemu-devel] [PATCH v8 2/6] monitor: resume the monitor earlier if needed

[Peter Xu <peterx@redhat.com>]

Currently when QMP request queue full we won't resume the monitor until
we have completely handled the current command.  It's not necessary
since even before it's handled the queue is already non-full.  Moving
the resume logic earlier before the command execution, hence drop the
need_resume local variable.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 monitor.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/monitor.c b/monitor.c
index a89bb86599..c2c9853f75 100644
--- a/monitor.c
+++ b/monitor.c
@@ -4130,7 +4130,6 @@ static void monitor_qmp_bh_dispatcher(void *data)
 {
     QMPRequest *req_obj = monitor_qmp_requests_pop_any_with_lock();
     QDict *rsp;
-    bool need_resume;
     Monitor *mon;
 
     if (!req_obj) {
@@ -4139,8 +4138,11 @@ static void monitor_qmp_bh_dispatcher(void *data)
 
     mon = req_obj->mon;
     /*  qmp_oob_enabled() might change after "qmp_capabilities" */
-    need_resume = !qmp_oob_enabled(mon) ||
-        mon->qmp.qmp_requests->length == QMP_REQ_QUEUE_LEN_MAX - 1;
+    if (!qmp_oob_enabled(mon) ||
+        mon->qmp.qmp_requests->length == QMP_REQ_QUEUE_LEN_MAX - 1) {
+        /* Pairs with the monitor_suspend() in handle_qmp_command() */
+        monitor_resume(mon);
+    }
     qemu_mutex_unlock(&mon->qmp.qmp_queue_lock);
     if (req_obj->req) {
         trace_monitor_qmp_cmd_in_band(qobject_get_try_str(req_obj->id) ?: "");
@@ -4153,10 +4155,6 @@ static void monitor_qmp_bh_dispatcher(void *data)
         qobject_unref(rsp);
     }
 
-    if (need_resume) {
-        /* Pairs with the monitor_suspend() in handle_qmp_command() */
-        monitor_resume(mon);
-    }
     qmp_request_free(req_obj);
 
     /* Reschedule instead of looping so the main loop stays responsive */
-- 
2.17.1