> On Jul 16, 2015, at 15:07 , Joel Sherrill <joel.sherr...@oarcorp.com> wrote: > >> >> - I was having NFS crashes regularly. I removed a pthread_mutex_trylock() >> in an ISR (I assumed that was safe) while trying to make that ISR faster and >> the NFS issues disappeared. I haven’t had time to go back to that either. > > There are checks against that. I don't remember the exact restrictions and > it may be completely forbidden. But depending on the configuration of the > mutex, it doesn't even make sense. Priority inheritance and ceiling imply > an owner thread so lock operations need to be from threads for mutexes. > > You probably could have gotten by with a semaphore but wouldn't have had > the nice properties of a mutex. > >
I was foolishly thinking any non-blocking routine usable in a signal handler should be usable in an ISR. The way I’m using it can and should be replaced by a compare-and-swap. I hope it was the cause of the NFS issues, when I have time I’m going to re-enable it and see if the problems come back. Peter ----------------- Peter Dufault HD Associates, Inc. Software and System Engineering _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
