linux-kernel - Re: software suspend doesn't work with 2.6.22-rc3

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Message-Id: <200705310854.52490.rjw@sisk.pl>
Date:	Thu, 31 May 2007 08:54:51 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Maximilian Engelhardt <maxi@...monizer.de>,
	nigel@...el.suspend2.net,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Pavel Machek <pavel@....cz>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: software suspend doesn't work with 2.6.22-rc3

On Tuesday, 29 May 2007 02:39, Herbert Xu wrote:
> On Mon, May 28, 2007 at 08:21:29PM +0200, Rafael J. Wysocki wrote:
> >
> > Well, it looks like we have to fix this one separately.
> > 
> > Can you please tell me what to do to make cryptd run?
> 
> If you build it as a module then just loading it should be sufficient.
> If you have it built-in then it should always be there.
> 
> Let me know when you guys have a final patch.

The problem is more serious than I thought:

kthread_create() in crypto/cryptd.c line 302 doesn't return, so cryptd is stuck
in TASK_UNINTERRUPTIBLE all the time and it doesn't even execute one
instruction from cryptd_thread() [this happens on x86_64].

I've investigated this for a while, but I don't know why it happens.

Greetings,
Rafael
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