[ofa-general] Re: dst_ifdown breaks infiniband?

[Michael S. Tsirkin]

Quoting Alexey Kuznetsov <kuznet at ms2.inr.ac.ru>:
Subject: Re: dst_ifdown breaks infiniband?
> > Can dst->neighbour be changed to point to NULL instead, and the neighbour
> > released?
> 
> It should be cleared and we should be sure it will not be destroyed
> before quiescent state.
> 
> Seems, this is the only correct solution, but to do this we have
> to audit all the places where dst->neighbour is dereferenced for
> RCU safety.
> 
> Actually, it is very good you caught this eventually, the bug was
> so _disgusting_ that it was "forgotten" all the time, waiting for
> someone who will point out that the king is naked. :-)

Actually that might not be too bad:
$grep -rIi 'dst->neighbour' net/ | wc -l
36

I'll try to do it.

-- 
MST