The guard on every lookup inside a store transaction hid a source or target
the filer holds only on the remote from the rename, and the prefetch before
the transaction did not reach the children of a directory rename. The
deadlock needs a write: CreateEntry's lookup after the transaction deleted
the path. That lookup alone skips the fetch; reads inside the transaction
keep it, and their persist on a second connection holds no lock the
transaction waits for.
(cherry picked from commit f555092c324780a8fe5314b238694551e3ef6be5)
james
b7dfff6616