[PATCH] block/export: only acquire AioContext once for vhost_user_server_stop()

* [PATCH] block/export: only acquire AioContext once for vhost_user_server_stop()
@ 2023-03-23 14:58 Stefan Hajnoczi
  2023-03-27 11:47 ` Kevin Wolf
  0 siblings, 1 reply; 2+ messages in thread
From: Stefan Hajnoczi @ 2023-03-23 14:58 UTC (permalink / raw)
  To: qemu-devel; +Cc: qemu-block, Kevin Wolf, Coiby Xu, Stefan Hajnoczi

vhost_user_server_stop() uses AIO_WAIT_WHILE(). AIO_WAIT_WHILE()
requires that AioContext is only acquired once.

Since blk_exp_request_shutdown() already acquires the AioContext it
shouldn't be acquired again in vhost_user_server_stop().

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 util/vhost-user-server.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/util/vhost-user-server.c b/util/vhost-user-server.c
index 40f36ea214..5b6216069c 100644
--- a/util/vhost-user-server.c
+++ b/util/vhost-user-server.c
@@ -346,10 +346,9 @@ static void vu_accept(QIONetListener *listener, QIOChannelSocket *sioc,
     aio_context_release(server->ctx);
 }
 
+/* server->ctx acquired by caller */
 void vhost_user_server_stop(VuServer *server)
 {
-    aio_context_acquire(server->ctx);
-
     qemu_bh_delete(server->restart_listener_bh);
     server->restart_listener_bh = NULL;
 
@@ -366,8 +365,6 @@ void vhost_user_server_stop(VuServer *server)
         AIO_WAIT_WHILE(server->ctx, server->co_trip);
     }
 
-    aio_context_release(server->ctx);
-
     if (server->listener) {
         qio_net_listener_disconnect(server->listener);
         object_unref(OBJECT(server->listener));
-- 
2.39.2



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