Sergio Ruocco wrote:
before really deciding for the use of PI, you may want to read what Victor Yodaiken had to say: http://www.yodaiken.com/papers-and-talks/ Against priority inheritance, Victor Yodaiken. September 23, 2004 http://www.yodaiken.com/papers/inherit.pdf Here is a general Linux RT workshop report, with some comments on PI: http://lwn.net/Articles/354690/
Hi Sergio, thanks for that reading. I (hope to) know which drawbacks and shortcomings priority inheritance has. Before I can make a decision about using an RT_PREEMPT patched Linux, I want to know if the RT_PREEMPT-patch introduces priority inheritance automatically, that is, without using any locks? For example (from my opening post): Imagine a hypothetical case: a high RT-priority (60) task triggers a blocking system call which triggers a device driver whose ISR is a kernel thread with RT-priority 49. So, a medium RT-priority (55) task is able block the high RT-priority task, isn't it? With kind regards, Martin Däumler -- 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
