Thank you. However when I turn debug on the problem goes away :( On Thu, Jan 26, 2017 at 4:57 PM, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote: > On 2017-01-25 13:54:15 [+0000], Andy Ng wrote: >> Dear List, >> >> I have an interesting problem on 3.0.35 with the rt56 patch on ARM. >> >> I have some external events that drive my ISR, which I have set it up >> as non_threaded one. >> When the interrupt rate is low, 1.8msec things are going fine, but >> when the rate is higher, the wake_up call from the isr does not >> return. The system is frozen. No Magic SysRq. Nothing. >> >> All will work fine once I change my ISR to be a threaded one. >> >> Any ideas where to search? > > If you you enable lockdep and sleeping-while-atomic warning you should > see quite a few warnings. That would be a good starting point to search. > >> Kind regards, >> Andy > > Sebastian -- 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
