On Thursday 2009-04-16 14:12, Patrick McHardy wrote: > Jan Engelhardt wrote: >> On Wednesday 2009-04-15 23:07, Eric Dumazet wrote: >>> Stephen Hemminger a écrit : >>>> Looks like there is some recursive path into ip_tables that makes the >>>> per-cpu spinlock break. I get lockup's with KVM networking. >>>> >>>> Suggestions? >>> Well, it seems original patch was not so bad after all >>> >>> http://lists.netfilter.org/pipermail/netfilter-devel/2006-January/023175.html >>> >>> So change per-cpu spinlocks to per-cpu rwlocks >>> and use read_lock() in ipt_do_table() to allow recursion... >>> >> iptables cannot quite recurse into itself due to the comefrom stuff. > > Actually it can by using the REJECT target: Yes, but it has to return an absolute verdict (which REJECT does), so it's not really a recursion, it's more like a goto without return. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
