With the change for
WT-4966, valgrind can now make progress beyond the test/csuite/import directory. It is currently hanging on test/csuite/wt2535_insert_race.
Looking on tinderbox, the process has consumed a ton of time:
Given it has run over 600 minutes, that test should be skipped for valgrind (similar to the way test/csuite/wt2853_perf/main.c and others skip with valgrind).
Until that change is in, valgrind will continue to hang on that test.