Hi,u I just merged a patch into SVN which removes some probably never used feature of RTnet: socket creation and destruction in hard RT context.
If you never played with the module parameter rtskb_cache_size, you don't need to worry at all. If you did, you either wrote a kernel-hosted RT application and called [rtdev_]socket() from real-time tasks, or you noticed that creating sockets from userspace RT tasks sometimes failed - precisely always then when the caller happened to run in RT (Xenomai: "primary") context. In the former case (kernel application), you should now move all your socket setup/cleanup code into module_init/cleanup context. In the latter case, the real-time Linux extension now simply switch the caller of [rtdev_]socket() into the right context: non-RT. Thus you don't need to worry about the rtskb_cache anymore, all buffers for your socket are allocated from Linux pools. The same goes for extending/shrinking those socket buffer pools: all happens in non-RT now. All in all, this removal is expected to simplify the use of RTnet, specifically in userspace applications. Jan
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