Hi all, I am trying to test kernel preemption in my driver. When I first compiled the Linux kernel and tested it, I found it to be non-preemptible. Later I realised that my kernel was build with premption disabled. I enabled kernel premption in processort section i.e. CONFIG_PREEMPT and rebuild it. Even with change in the kernel preemption does not work. I am trying it on my latest stable kernel. Test code: -------------- read() { if(down_interruptible()) return error; mdelay(10000); up(); } With this code in place, I try to do a 'CTRL+C' when it hangs at that delay. It does not respond to my 'CTRL + C'. Where am I missing the preemption thing in the kernel? Regards, Bhanu J -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ