Hi, The call to ipv6_chk_acast_addr_src in icmp6_send can be pretty costly on systems with a lot of net_devices since it can end up looping through all net_devices in a net namespace searching for an anycast address. A few thousand icmp6 error packets can end up consuming a whole CPU. I am thinking of fixing this by adding a hash table along the lines of inet6_addr_lst, providing a fast lookup for anycast addresses. Is that the right way to go?
Thanks, Salam
