On Wed, 2006-08-16 at 09:43 -0700, Roland Dreier wrote: > Arjan, here's a case that disproves your rule of thumb that rwsems > are equivalent to mutexes as far as correctness goes: you can't have > an AB-BA deadlock with nested rwsems when using down_read(). In other > words, the following: > > down_read(&lock_1); > down_read(&lock_2); > down_read(&lock_2); > down_read(&lock_1); > > is perfectly safe
it's safe as long as you never ever do a down_write nested inside or outside a down_read of any of these locks.... -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
