From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 20 Sep 2001 02:16:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 20 Sep 2001 02:16:00 -0400 Received: from fe070.worldonline.dk ([212.54.64.208]:17669 "HELO fe070.worldonline.dk") by vger.kernel.org with SMTP id ; Thu, 20 Sep 2001 02:15:55 -0400 Date: Thu, 20 Sep 2001 08:13:53 +0200 From: Jens Axboe To: Jari Ruusu Cc: "steve j. kondik" , linux-kernel@vger.kernel.org Subject: Re: encrypted swap on loop in 2.4.10-pre12? Message-ID: <20010920081353.H588@suse.de> In-Reply-To: <1000912739.17522.2.camel@discord> <3BA907F6.3586811C@pp.inet.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3BA907F6.3586811C@pp.inet.fi> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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