vl: Adjust the place of calling mlockall to speedup VM's startup

If we configure mlock=on and memory policy=bind at the same time,
It will consume lots of time for system to treat with memory,
especially when call mbind behind mlockall.

Adjust the place of calling mlockall, calling mbind before mlockall
can remarkably reduce the time of VM's startup.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/vl.c b/vl.c
index dbdca594b749c303a93d09da73738f561b86d1d0..9d2aaaf1dcf2281b34c973f4da172667dda9df96 100644 (file)
--- a/vl.c
+++ b/vl.c
@@ -134,6 +134,7 @@ const char* keyboard_layout = NULL;
 ram_addr_t ram_size;
 const char *mem_path = NULL;
 int mem_prealloc = 0; /* force preallocation of physical target memory */
+bool enable_mlock = false;
 int nb_nics;
 NICInfo nd_table[MAX_NICS];
 int autostart;
@@ -1421,12 +1422,8 @@ static void smp_parse(QemuOpts *opts)
 
 }
 
-static void configure_realtime(QemuOpts *opts)
+static void realtime_init(void)
 {
-    bool enable_mlock;
-
-    enable_mlock = qemu_opt_get_bool(opts, "mlock", true);
-
     if (enable_mlock) {
         if (os_mlock() < 0) {
             fprintf(stderr, "qemu: locking memory failed\n");
@@ -3974,7 +3971,7 @@ int main(int argc, char **argv, char **envp)
                 if (!opts) {
                     exit(1);
                 }
-                configure_realtime(opts);
+                enable_mlock = qemu_opt_get_bool(opts, "mlock", true);
                 break;
             case QEMU_OPTION_msg:
                 opts = qemu_opts_parse(qemu_find_opts("msg"), optarg, 0);
@@ -4442,6 +4439,8 @@ int main(int argc, char **argv, char **envp)
 
     machine_class->init(current_machine);
 
+    realtime_init();
+
     audio_init();
 
     cpu_synchronize_all_post_init();