Kevin Wilson <[email protected]> wrote: >Hi, >Can someone please explain why are netlink sockets a better >communication method between kernel space and userspace ? >
It's been a long time since I thought about it but I think the primary issue is the abi ends up not being architecture independent unless you are very careful. A structure definition in source code does not map one-to-one with a memory layout. It varies based on the architecture and the compiler options. Specifically because compilers insert dead space between structure members to force proper word alignment, resolving the issue of a common abi that allows 32bit userspace to have the exact same structure layout as a 64bit kernel is problematic. It can be done, but I believe it was the source of a lot if bugs, so the community decided to simply discourage there use. (The main discussion about this was a long time ago, I hope I am remembering right.) Greg -- Sent from my Android phone with K-9 Mail. Please excuse my brevity. _______________________________________________ Kernelnewbies mailing list [email protected] http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
