os/bluestore: Improve ExtentMap::fault_range

Make faster exit when sharding not enabled.

Signed-off-by: Adam Kupczyk <akupczyk@ibm.com>

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 6eb2f7c504764cc61f0dc25b4f435ee23c20e55c..43f6e0f345f3ce24b8d91f2cf48b5a58e9b2f7bf 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -3342,13 +3342,15 @@ void BlueStore::ExtentMap::fault_range(
 {
   dout(30) << __func__ << " 0x" << std::hex << offset << "~" << length
           << std::dec << dendl;
+  if (shards.size() == 0) {
+    // no sharding yet; everyting is loaded
+    return;
+  }
   auto start = seek_shard(offset);
   auto last = seek_shard(offset + length);
-
-  if (start < 0)
-    return;
-
   ceph_assert(last >= start);
+  ceph_assert(start >= 0);
+
   string key;
   while (start <= last) {
     ceph_assert((size_t)start < shards.size());