Hello, I've tried to insmod the module which I attached to this file. On insmod'ing, the module gets stuck on the wake_up_interruptible(&timer_queue); line. If I'm uncommenting this line, everything goes smooth...the timer runs. Does somebody know, why the wake_up_interruptible call blocks? What do I have to do to prevent this? Because I've to wake up processes on every interrupt. Best regards, Juergen -- Neu bei GMX: Preissenkung für MMS-Versand und FreeMMS! Ideal für alle, die gerne MMS verschicken: 25 FreeMMS/Monat mit GMX TopMail. http://www.gmx.net/de/cgi/produktemail +++ GMX - die erste Adresse für Mail, Message, More! +++ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/