os/bluestore: only use tail if tail_offset matches

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc
index ca1f93d352016926b65cb509ca3b3584cb1bcd26..8af1c6a754718b8fe132006d198ab814c3bea582 100644 (file)
--- a/src/os/bluestore/BlueStore.cc
+++ b/src/os/bluestore/BlueStore.cc
@@ -5466,6 +5466,7 @@ int BlueStore::_do_write(
     if (offset >= bp->first &&
        offset > tail_start &&
        offset + length >= o->onode.size &&
+       o->tail_offset == tail_start &&
        o->tail_bl.length() &&
        (offset / block_size == (o->onode.size - 1) / block_size)) {
       dout(20) << __func__ << " using cached tail" << dendl;