linux-kernel - Re: [BUG,2.6.28,s390] Fails to boot in Hercules S/390 emulator

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Date:	Wed, 18 Mar 2009 08:39:18 -0700
From:	John Stultz <johnstul@...ibm.com>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>
Cc:	Frans Pop <elendil@...net.nl>, linux-s390@...r.kernel.org,
	Roman Zippel <zippel@...ux-m68k.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUG,2.6.28,s390] Fails to boot in Hercules S/390 emulator -
 hang traced

On Wed, 2009-03-18 at 10:28 +0100, Martin Schwidefsky wrote:
> On Tue, 17 Mar 2009 19:54:57 -0700
> john stultz <johnstul@...ibm.com> wrote:
> 
> > Martin: I'm not sure if the problem here is the __div64_32
> > implementation or if the emulator is doing something wrong here. Might
> > need some help from you in sorting this out.
> 
> __div64_31 is incorrect. Patch and description see below.
> 
> How long did you debug this until you finally got down to div64 as the
> cause of this? It must have taken you hours!

:) Yea, not counting s390 environment ramp up. 

Thanks for the quick turnaround on the fix!

-john


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