zfs pool import hangs on [tx->tx_sync_done_cv]

[K. Macy]

>> A recent quick read of the code would lead me to believe that
>
> Yer I would have got the zio details but typically its "optimised out" by
> the
> compiler, so will need some effort to track that down unfortunately :(

FYI it isn't actually optimized out. The debug info accounting just
isn't very good about tracking the values in registers. You'll see in
my last mail that just looking at the assembler makes it pretty
obvious that zio was in %r14. HTH.

Cheers.


-K