From cff5dc5d12599aa93a5e4dea911300e98811dc91 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Tue, 22 Dec 2015 16:36:59 -0500
Subject: [PATCH] os/bluestore/BlockDevice: helpful error when aio cannot init

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/os/bluestore/BlockDevice.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/os/bluestore/BlockDevice.cc b/src/os/bluestore/BlockDevice.cc
index 9af3bec3c34a5..3afc4d7c22247 100644
--- a/src/os/bluestore/BlockDevice.cc
+++ b/src/os/bluestore/BlockDevice.cc
@@ -183,8 +183,10 @@ int BlockDevice::_aio_start()
   if (g_conf->bdev_aio) {
     dout(10) << __func__ << dendl;
     int r = aio_queue.init();
-    if (r < 0)
+    if (r < 0) {
+      derr << __func__ << " failed: " << cpp_strerror(r) << dendl;
       return r;
+    }
     aio_thread.create();
   }
   return 0;
-- 
2.39.5