os/bluestore: add tail length when caculating reserved buffer size

Signed-off-by: Xiangyang Yu <penglaiyxy@gmail.com>

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index 36099baf0f0426de26bf4a225ecc633675783449..9233e159cf4589678371011a6f96153ba272749d 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -1423,7 +1423,7 @@ int BlueStore::BufferSpace::_discard(BufferCacheShard* cache, uint32_t offset, u
                      0, b);
        }
        if (!b->is_writing()) {
-         cache->_adjust_size(b, front - (int64_t)b->length);
+         cache->_adjust_size(b, tail + front - (int64_t)b->length);
        }
        b->truncate(front);
        b->maybe_rebuild();