Re: [PATCH] netfilter: use per-cpu spinlock rather than RCU (v3)

[Jan Engelhardt]

On Wednesday 2009-04-15 23:07, Eric Dumazet wrote:
>Stephen Hemminger a Ãcrit :
>> 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.

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