[dm-devel] DM-CRYPT: Scale to multiple CPUs v3

[Andi Kleen]

> But previously, there were threads per device, so if one IO thread blocks,
> others stacked mappings can continue
> Now I see possibility for deadlock there because we have one io thread now
> (assuming that 1 CPU situation Alasdair mentioned).

That path calls the crypto worker thread, not the IO worker thread?
crypto worker should be fine here, only IO worker would be a problem
I think because crypto doesn't really block on nested IO.

-Andi