Re: [PATCH] IPVS netns shutdown/startup dead-lock

To: Simon Horman <horms@xxxxxxxxxxxx>
Subject: Re: [PATCH] IPVS netns shutdown/startup dead-lock
Cc: Patrick McHardy <kaber@xxxxxxxxx>, lvs-devel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, netfilter-devel@xxxxxxxxxxxxxxx, Wensong Zhang <wensong@xxxxxxxxxxxx>, Julian Anastasov <ja@xxxxxx>, David Miller <davem@xxxxxxxxxxxxx>, Hans Schillstrom <hans@xxxxxxxxxxxxxxx>
From: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
Date: Wed, 12 Oct 2011 18:33:42 +0200
On Tue, Oct 11, 2011 at 10:54:35AM +0900, Simon Horman wrote:
> From: Hans Schillstrom <hans@xxxxxxxxxxxxxxx>
> 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
> 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.

Applied, thanks Simon.;a=shortlog;h=refs/heads/nf
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