Re: lwlocks and starvation

Neil Conway <neilc@samurai.com> writes:
> AFAICS, that is not the case. See lwlock.c, circa line 264: in LW_SHARED 
> mode, we check if "exclusive" is zero; if so, we acquire the lock 
> (increment the shared lock count and do not block). And "exclusive" is 
> set non-zero only when we _acquire_ a lock in exclusive mode, not when 
> we add an exclusive waiter to the wait queue.

Ooh, you are right.  I think that may qualify as a bug ...
        regards, tom lane