[ofa-general] Re: dst_ifdown breaks infiniband?

[Michael S. Tsirkin]

> Quoting Eric W. Biederman <ebiederman at lnxi.com>:
> Subject: Re: [ofa-general] Re: dst_ifdown breaks infiniband?
> 
> "Michael S. Tsirkin" <mst at dev.mellanox.co.il> writes:
> 
> >> > Why is neighbour->dev changed here?
> >> 
> >> It holds reference to device and prevents its destruction.
> >> If dst is held somewhere, we cannot destroy the device and deadlock
> >> while unregister.
> >
> > BTW, can this ever happen for the loopback device itself?
> > Is it ever unregistered?
> 
> Well I don't think the loopback device is currently but as soon
> as we get network namespace support we will have multiple loopback
> devices and they will get unregistered when we remove the network
> namespace.

Hmm. Then the code moving dst->dev to point to the loopback
device will have to be fixed too. I'll post a patch a bit later.

-- 
MST