From: Peter Xu <pet...@redhat.com>

Start to use dedicate IO thread for QMP monitors that are not using
MUXed chardev.

Reviewed-by: Fam Zheng <f...@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Signed-off-by: Peter Xu <pet...@redhat.com>
Message-Id: <20180309090006.10018-21-pet...@redhat.com>
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
 monitor.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/monitor.c b/monitor.c
index 905d5efc6fa..dea4111e693 100644
--- a/monitor.c
+++ b/monitor.c
@@ -36,6 +36,7 @@
 #include "net/slirp.h"
 #include "chardev/char-fe.h"
 #include "chardev/char-io.h"
+#include "chardev/char-mux.h"
 #include "ui/qemu-spice.h"
 #include "sysemu/numa.h"
 #include "monitor/monitor.h"
@@ -4533,8 +4534,10 @@ static void monitor_qmp_setup_handlers_bh(void *opaque)
 void monitor_init(Chardev *chr, int flags)
 {
     Monitor *mon = g_malloc(sizeof(*mon));
+    /* Enable IOThread for QMPs that are not using MUX chardev backends. */
+    bool use_io_thr = (!CHARDEV_IS_MUX(chr)) && (flags & MONITOR_USE_CONTROL);

-    monitor_data_init(mon, false, false);
+    monitor_data_init(mon, false, use_io_thr);

     qemu_chr_fe_init(&mon->chr, chr, &error_abort);
     mon->flags = flags;
-- 
2.14.3


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