Hi, > Besides of the cpu load i also found out that with rt11 i can again wake up > usermode from a IRQF_NO_THREAD waiting on a waitqueue. So the steps outlined > in this mail http://www.spinics.net/lists/linux-rt-users/msg06834.html do not > seem to be neccessary anymore? Or does this create an error and than some high > load? Try running with CONFIG_DEBUG_SPINLOCK_SLEEP and you would probably see some errors... If you have CONFIG_PREEMPT_RT_FULL set, then the __wake_up function of the waitqueue runs into a spinlock. This spinlock will be converted to a mutex since it is a regular spinlock, not a raw_spinlock. A mutex-lock might sleep. Calling sleeping functions from hard-irq context is illegal. Kind regards, Remy -- 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
