Hi On 1/10/06, Thomas Petazzoni <thomas.petazzoni@xxxxxxxx> wrote: > Most of the time, sending a signal to a user-space process from the > kernel is a bad idea. Does it influence on perfomance as much? Please, explain your point of view. Thank you > Why do you need to do that ? I didn't find any other and better solution for notification informing from kernel to user-level application than signals. I've implemented driver, which waits for some event from external device. When this event comes, i should notify ASAP my user-space application from kernel to achieve the fastest reaction. Now i am using only signals and i don't know what i can do else. Can you advice me something ? Thank you! With best regards, Sergey Semionov -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/