Hi, I was trying to trace fflush inside the kernel. But could not get much information about it. is flush operation of the file system is called when you call fflush. that seems to me the closest. But it is not implemented for all file systems. So when you call fflush(fp) what exactly happens. Thanks, Raghu -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/