From: Xin Long <lucien....@gmail.com> Date: Tue, 15 Nov 2016 23:23:11 +0800
> Now sctp transport rhashtable uses hash(lport, dport, daddr) as the key > to hash a node to one chain. If in one host thousands of assocs connect > to one server with the same lport and different laddrs (although it's > not a normal case), all the transports would be hashed into the same > chain. > > It may cause to keep returning -EBUSY when inserting a new node, as the > chain is too long and sctp inserts a transport node in a loop, which > could even lead to system hangs there. > > The new rhlist interface works for this case that there are many nodes > with the same key in one chain. It puts them into a list then makes this > list be as a node of the chain. > > This patch is to replace rhashtable_ interface with rhltable_ interface. > Since a chain would not be too long and it would not return -EBUSY with > this fix when inserting a node, the reinsert loop is also removed here. > > Signed-off-by: Xin Long <lucien....@gmail.com> Applied to net-next, thanks.
