Messages in this thread | | | Date | Mon, 16 Nov 2015 20:33:42 +0100 | Subject | Re: [PATCH v2] ip_tunnel: disable preemption when updating per-cpu tstats | From | "Jason A. Donenfeld" <> |
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On Mon, Nov 16, 2015 at 8:17 PM, David Miller <davem@davemloft.net> wrote: > So another fix could have been to do local_bh_disable() in the > udp_tunnel6_xmit_skb() helper.
This would have fixed one problem, but everywhere udp_tunnel_xmit_skb() (4, not 6) is called, iptunnel_xmit_stats is called right after it, so there would have to be a modicum of patches for all of these places too.
By the way, there's something else I noticed about this in dealing with these functions: the return value of udp_tunnel_xmit_skb is different from that of udp_tunnel6_xmit_skb. Nobody is using them incorrectly, so far as I can see, but it is confusing that they return different things. I had started to clean this up and send a patch, but it got a bit invasive in drivers I shouldn't really touch. But if somebody with a bit more top-down command of things wants to poke at this, it's a low hanging fruit as far as I can see.
> > Thanks again.
My pleasure.
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