Greg KH wrote: >> Doing enough printk's such as in register_console() will cause loss >> because you run out of URBs unless you can force them to complete. >> > > Why not just make the upper bound of urbs very large? We used to have > an unlimited number of in-flight urbs for some drivers until it was > pointed out that a simple: > cat /dev/null > /dev/ttyUSB0 > would cause a DoS :) > > What happens if your upper bound is 400? 4000? Will that work > properly? > Sure, if you have enough of a urb available, ultimately you get all the printk's. If I want to printk from the nmi_watchdog out to this device, am I going to get anything if the write is not synchronous, because in theory the hcd device is never going to get accessed again? Ideally I want to make sure that somehow I get my debug output out to the console, even if it means we do some polling after the oops state is set. Jason. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
