Opening samba shares from a Windows PC is very slow and I see in logs: Apr 14 00:18:49 amdas smbd[4837]: [2005/04/14 00:18:49, 0] tdb/tdbutil.c:tdb_log(725) Apr 14 00:18:49 amdas smbd[4837]: tdb(/etc/samba/secrets.tdb): tdb_lock failed on list 43 ltype=1 (Interrupted system call) Apr 14 00:18:49 amdas smbd[4837]: [2005/04/14 00:18:49, 0] tdb/tdbutil.c:tdb_chainlock_with_timeout_internal(77) Apr 14 00:18:49 amdas smbd[4837]: tdb_chainlock_with_timeout_internal: alarm (10) timed out for key DOMAIN_CONTROLLER in tdb /etc/samba/secrets.tdb After reverting back to glibc-2.3.4-2.fc3 and restarting winbind problems disappear.
Seems the problems disappeared only temporarily, so most probably it is not a glibc bug.