Hans Schillstrom ae1d48b23d
IPVS netns shutdown/startup dead-lock ...
ip_vs_mutext is used by both netns shutdown code and startup
and both implicit uses sk_lock-AF_INET mutex.
cleanup CPU-1 startup CPU-2
ip_vs_dst_event() ip_vs_genl_set_cmd()
sk_lock-AF_INET __ip_vs_mutex
sk_lock-AF_INET
__ip_vs_mutex
* DEAD LOCK *
A new mutex placed in ip_vs netns struct called sync_mutex is added.
Comments from Julian and Simon added.
This patch has been running for more than 3 month now and it seems to work.
Ver. 3
IP_VS_SO_GET_DAEMON in do_ip_vs_get_ctl protected by sync_mutex
instead of __ip_vs_mutex as sugested by Julian.
Signed-off-by: Hans Schillstrom <hans@schillstrom.com >
Acked-by: Julian Anastasov <ja@ssi.bg >
Signed-off-by: Simon Horman <horms@verge.net.au >
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org >
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ae1d48b23d