From 0e530870e8eda7a88da9b661dc8975d424ef1c75 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Thu, 8 Sep 2016 14:29:58 -0400
Subject: [PATCH] os/bluestore/BlueFS: only extend extent on same bdev

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

diff --git a/src/os/bluestore/BlueFS.cc b/src/os/bluestore/BlueFS.cc
index ffb429b4c2273..5ad740abfe2e8 100644
--- a/src/os/bluestore/BlueFS.cc
+++ b/src/os/bluestore/BlueFS.cc
@@ -1688,7 +1688,9 @@ int BlueFS::_allocate(uint8_t id, uint64_t len, vector<bluefs_extent_t> *ev)
   }
   for (int i = 0; i < count; i++) {
     bluefs_extent_t e = bluefs_extent_t(id, extents[i].offset, extents[i].length);
-    if (!ev->empty() && ev->back().end() == (uint64_t) e.offset) {
+    if (!ev->empty() &&
+	ev->back().bdev == e.bdev &&
+	ev->back().end() == (uint64_t) e.offset) {
       ev->back().length += e.length;
     } else {
       ev->push_back(e);