xgitlab.cels.anl.gov is now deprecated. If you're a project owner and wish to continue to host this project in CELS gitlab, see https://help.cels.anl.gov/docs/migrating-from-legacy-to-gce/gitlab/ for instructions on how to have your project migrated to the new gitlab server.
This server will be retired on December 15, 2022.
Anonymous mmap() calls have no backing file and therefore won't match any Darshan characterization records, so we can skip the record lookup in this case. This also fixes a deadlock on Cray systems with hugepages enabled, see #210.