[ofa-general] IPoIB caused a kernel: BUG: soft lockup detected on CPU#0!

[Roland Dreier]

> Feb 27 17:47:52 sw169 kernel:  [<ffffffff8053aaf1>] _spin_lock_irqsave+0x15/0x24
> Feb 27 17:47:52 sw169 kernel:  [<ffffffff88067a23>] :ib_ipoib:ipoib_neigh_destructor+0xc2/0x139

It looks like this is deadlocking trying to take priv->lock in
ipoib_neigh_destructor().
One idea I just had would be to build a kernel with CONFIG_PROVE_LOCKING turned
on, and then rerun this test.  There's a good chance that this would
diagnose the
deadlock.  (I don't have good access to my test machines right now, or
else I would
do it myself)

 - R.