linux-kernel - Re: 2.6.33-rc8 breaks UML with Restrict initial stack space expansion to rlimit

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Message-ID: <20100215071215.GA20814@jm.kir.nu>
Date:	Mon, 15 Feb 2010 09:12:15 +0200
From:	Jouni Malinen <j@...fi>
To:	Michael Neuling <mikey@...ling.org>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, anton@...ba.org
Subject: Re: 2.6.33-rc8 breaks UML with Restrict initial stack space
 expansion to rlimit

On Mon, Feb 15, 2010 at 05:30:20PM +1100, Michael Neuling wrote:

> We got the logic wrong in one of the cleanups and hence we aren't
> actually changing the stack reservation ever, when we intended on
> allocating up to 20 new pages.  
> 
> The:
> 	rlim_stack = min(rlim_stack, stack_size);
> always chooses stack_size hence we end up not changing the stack at all.
> This seems to cause fatal problems on UML, but is obviously not what was
> intended for archs as well.  
> 
> The following works for me on PPC64 64k and 4k pages and UML on x86_64. 

That fixes my UML setup, too.

-- 
Jouni Malinen                                            PGP id EFC895FA
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