It seems like the sysrq code can get starved by a SCHED_FIFO task. I learned this by having an accidentally runaway SCHED_FIFO task which locked up my system. No SAK, no sync, no unmount, no reboot. Big Red Button. David -- David Mansfield (718) 963-2020 [EMAIL PROTECTED] Ultramaster Group, LLC www.ultramaster.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/