On Mon, 2007-07-02 at 16:48 +0200, Johannes Berg wrote: > If I find time I might > actually fix the unregistration bug too, but I have a feeling digging in > the socket code might take more time than I have right now.
Hmm. I started digging into the af_netlink.c code and realised that the whole thing I've been doing cannot possibly work completely since the genl socket is created with GENL_MAX_ID as the "groups" parameter to netlink_kernel_create() and that limits the groups, and the af_netlink code really wants to know the number of groups up-front. So some deeper surgery is required to lift the limit of 1023 multicast group now. Not that I like the current genetlink code, we allocate 256 bytes for the in-kernel socket just for the listeners bitmap, and just as many for each socket's groups bitmaps while it's unlikely a regular system right now will ever reach that limit. I'll be posting some patches as replies. johannes
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