I thought this aricle might help some people to understand how interrupts are handled in Linux Kernel, so sending you the link for the same. Webmaster of kernelnewbies, if in case you find it suitable, we can also have a copy of it on kernelnewbies documentation section, do let me know. Here is my new article on Interrupt Handling subsystem of Linux Kernel. It talks in details about hardware as well as software prospective of interrupt handling in Linux. New Article Link: http://lkdp.blogspot.com/2006/01/interrupt-handling-internals-in-linux_22.html Old Articles: http://lkdp.blogspot.com/ Do let me know in case you find any problem in this article or have any suggestions for this. Hope it will be helpful to atleast some guys. regards, -Gaurav -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/