Re: [CHECKER] a couple potential deadlocks in 2.4.5-ac8

David Woodhouse
2001-06-09T19:34:33Z

torvalds@transmeta.com said:
> Good point. Spinlocks (with the exception of read-read locks, of
> course) and semaphores will deadlock on recursive use, while the BKL
> has this "process usage counter" recursion protection.

Obtaining a read lock twice can deadlock too, can't it?

A B
read_lock()
write_lock()
...sleeps...
read_lock()
...sleeps...

Or do we not make new readers sleep if there's a writer waiting?

--
dwmw2