On Sat, 26 Apr 2014 13:04:37 +0200 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > On Fri, Apr 25, 2014 at 04:28:48PM -0400, Steven Rostedt wrote: > > I've been discussing an issue on IRC with deadlock checking and found > > something wrong with it. Mainly, if any of the locks have a timeout, > > then even if the chain loops, there is no real deadlock. If one of the > > locks in the chain times out, then things will move forward again. > > > POSIX (opengroup): > > http://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_mutex_timedlock.html > > Explicitly states that pthread_mutex_timedlock() should participate in > the PI chain, it also states that its perfectly valid for this function > to return -EDEADLK. > > Therefore, there's nothing wrong. If this behaviour breaks userspace, > its already broken for not actually expecting the right thing. Fair enough. Thanks for the link. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
