os/bluestore: audit buffer bytes before applying delta

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

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index e75b7a155cf0d56663d52cc49296eb623e7bc355..c4acf8e76be03dd1ff1ec16f626c18d18263536d 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -683,6 +683,7 @@ void BlueStore::TwoQCache::_adjust_buffer_size(Buffer *b, int64_t delta)
 {
   dout(20) << __func__ << " delta " << delta << " on " << *b << dendl;
   if (!b->is_empty()) {
+    assert((int64_t)buffer_bytes + delta >= 0);
     buffer_bytes += delta;
   }
 }