[Qemu-devel] [5289] Do not allow AIO to be inited multiple times

[Anthony Liguori]

Revision: 5289
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5289
Author:   aliguori
Date:     2008-09-22 14:49:01 +0000 (Mon, 22 Sep 2008)

Log Message:
-----------
Do not allow AIO to be inited multiple times

This prevents two signalfd() threads from being spawned.  This problem was
originally spotted by Blue Swirl.

Signed-off-by: Anthony Liguori <address@hidden>

Modified Paths:
--------------
    trunk/block-raw-posix.c

Modified: trunk/block-raw-posix.c
===================================================================
--- trunk/block-raw-posix.c     2008-09-22 01:39:29 UTC (rev 5288)
+++ trunk/block-raw-posix.c     2008-09-22 14:49:01 UTC (rev 5289)
@@ -511,6 +511,9 @@
 {
     sigset_t mask;
 
+    if (aio_initialized)
+        return;
+
     aio_initialized = 1;
 
     /* Make sure to block AIO signal */