os/bluestore/BlueFS: Record the correctly perfcouter.

After "log_writer->append(bl)", the length of bl become zero.
So tune the order.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>

diff --git a/src/os/bluestore/BlueFS.cc b/src/os/bluestore/BlueFS.cc
index 41ae52a4d2c71e81eaea154a7c951933cc04e2b1..5a24f13bb16ce0986e752262801ed62c41768d5e 100644 (file)
--- a/src/os/bluestore/BlueFS.cc
+++ b/src/os/bluestore/BlueFS.cc
@@ -994,10 +994,10 @@ int BlueFS::_flush_log()
 
   // pad to block boundary
   _pad_bl(bl);
-  log_writer->append(bl);
-
   logger->inc(l_bluefs_logged_bytes, bl.length());
 
+  log_writer->append(bl);
+
   log_t.clear();
   log_t.seq = 0;  // just so debug output is less confusing