bluestore/BitAllocator: fix race condition

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>

diff --git a/src/os/bluestore/BitAllocator.cc b/src/os/bluestore/BitAllocator.cc
index 6b819b37cbb8e053452c3afa2f022c79b0ceae38..63c3de86c59aa09f458b515ee2376e026262daef 100644 (file)
--- a/src/os/bluestore/BitAllocator.cc
+++ b/src/os/bluestore/BitAllocator.cc
@@ -826,6 +826,7 @@ void BitMapAreaIN::unreserve(int64_t needed, int64_t allocated)
 }
 int64_t BitMapAreaIN::get_reserved_blocks()
 {
+  std::lock_guard<std::mutex> l(m_blocks_lock); 
   return m_reserved_blocks;
 }