Needless drop/reacquisition of fil_system->mutex

[Raghavendra D Prabhu]

In fil_delete_tablespace, on either sides of the following fragment

 if (srv_lazy_drop_table) {
  buf_LRU_mark_space_was_deleted(id);
 } else {
 buf_LRU_flush_or_remove_pages(
  id, evict_all
  ? BUF_REMOVE_ALL_NO_WRITE
  : BUF_REMOVE_FLUSH_NO_WRITE);

 }

it drops and reacquires fil_system->mutex which shouldn't be required if srv_lazy_drop_table is TRUE, since in buf_LRU_mark_space_was_deleted that mutex is not checked/acquired and LRU list mutex is instead used.

[Raghavendra D Prabhu (raghavendra-prabhu)]

Now that lazy drop table has been removed, I think this bug can be closed as well.

[Shahriyar Rzayev (rzayev-sehriyar)]

Percona now uses JIRA for bug reports so this bug report is migrated to: https://jira.percona.com/browse/PS-2905