[openib-general] Re: [PATCH 1/2] multicast: notify users on membership errors

[Sean Hefty]

Michael S. Tsirkin wrote:
>>These should eliminate any races with ipoib leaving,
>>then quickly re-joining a group as a result of an event.
> 
> Is there a chance this will fix the crashes me and Or were seeing?

It shouldn't.  The race that I was referring to only involved whether or not a 
MAD is sent when a new join request is received by the ib_multicast module.

I literally spent hours reviewing the ib_multicast code trying to identify how 
the crash you and Or saw could occur.  My conclusion is that it's impossible. 
:)  So, at this point, I'm still not sure how it happens.  I'll continue to 
spend some time looking at this, in the hope that I can at least add in some 
assertions that might indicate when the problem starts.

- Sean