hi Micha, >Why do you need the exact value, whats wrong with using the defines? i want that value for the same reason i place the another question about alloc_skb to know what kernel takes tcp header value which is 20 bytes header+ options bytes. as i told in another postings that i want to change the value of kernel space allocates to packet. one more thing i want to know why kernel takes 272 greater value as compared to only simple TCp header+ options value. regards, parag. >Kernelnewbies: Help each other learn about the Linux kernel. >Archive: http://mail.nl.linux.org/kernelnewbies/ >FAQ: http://kernelnewbies.org/faq/ >