> FWIW, reverting revision 1.199 of kern_conf.c locally fixes the > unkillable xterms, stuck in "devdrn", problem.
destroy_devl() is only stuck in "devdrn" if a thread has called dev_refthread() but not yet called dev_relthread(). If that thread doesn't sleep forever then it might write to freed memory on a system where revision 1.199 of kern_conf is reverted, cf. <URL:http://people.freebsd.org/~pho/stress/log/cons211.html>. Pseudo ttys need a purge method since there might be races associated with trying to wake sleeping threads before calling destroy_dev() where a new thread can go to sleep at the wrong moment. A related race is devfs_fp_check() versus devfs_reclaim(), allowing for dev_refthread() to be called with a pointer to freed memory. - Tor Egge _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
