> I looked at the implementation of the nbd which just calls
>
> spin_unlock_irq(&io_request_lock);
> ... do network io ...
> spin_lock_irq(&io_request_lock);
>
> This seems to work but it looks very dangerous to me (and ugly, too). Isn't there a
>better way to do this?
It is only dangerous if you unlock it in the wrong place, unlocking it as much
as possible is good behaviour. You need it locked until you get the actual
request off the queue, you need it locked when you complete the request. The
rest of the time you can be polite
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