Re: encrypted swap on loop in 2.4.10-pre12?

[Jens Axboe]

On Thu, Sep 20 2001, Jari Ruusu wrote:
> "steve j. kondik" wrote:
> > i've been using encrypted swap over loopdev using the new cryptoapi
> > patches.  i just built a 2.4.10-pre12 kernel and i got a panic doing
> > mkswap on the loopdev.  the mkswap process becomes unkillable after this
> > and never finishes.  this is repeatable everytime.  i've had no problems
> > whatsoever until this kernel even under high load..  any ideas? :>
> 
> Cryptoapi can't be used to encrypt swap. It has nasties like sleeping in
> make_request_fn() and potential memory allocation deadlock.

sleeping in make_request_fn is not a nasty in itself, btw. in fact loop
just needs an emergency page pool for swap to be perfectly safe.

-- 
Jens Axboe