On Monday, April 04, 2011 5:10:20 pm Ryan Stone wrote: > I'm running into a bootup crash under sched_4bsd on HEAD. The crash > happens when I have a thread bound to a single CPU that isn't the BSP, > and that thread is scheduled. If the AP that the thread is bound > hasn't been started up, kick_other_cpu() crashes because > pcpu->pc_curthread is NULL for the AP. > > I've put a small test kld in > http://people.freebsd.org/~rstone/4bsd_bind/ that reproduces the > problem. I'm not sure what the best way to address the crash is. ULE > is not affected by the problem; it seems to run the swi thread on CPU > 0 until CPU 1 is running.
Hummm. Patching 4BSD to use the same route as ULE may be the best solution for now if that is easiest. Alternatively, you could change 4BSD's sched_add() to not try to kick other CPUs until smp_started is true. -- John Baldwin _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
