[illumos-Developer] Thread stuck in zio_wait(), holding a mutex many threads want...

[Gordon Ross]

Here's some more info. on what I see:
http://pastie.org/1418757

I do think this looks like a deadlock, but I don't understand the details yet.
I suspect that the zio_done

It's reproducible, so another question is what kinds of instrumentation
would be useful to help narrow this down?

Any ideas appreciated!

Thanks,
Gordon