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Date: Tue, 1 Apr 2008 15:33:13 +0200
From: Andi Kleen <andi@firstfloor.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <andi@firstfloor.org>, Ingo Molnar <mingo@elte.hu>,
       kernel list <linux-kernel@vger.kernel.org>
Subject: Re: agpgart: scary messages are fortunately obsolete
Message-ID: <20080401133313.GK29105@one.firstfloor.org>
References: <20080328112507.GA10774@elf.ucw.cz> <20080328113508.GP29105@one.firstfloor.org> <20080401122403.GC12129@elf.ucw.cz>
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>  	/* Should not happen anymore */
> -	printk(KERN_ERR "PCI-DMA: More than 4GB of RAM and no IOMMU\n"
> -	       KERN_ERR "PCI-DMA: 32bit PCI IO may malfunction.\n");
> +	printk(KERN_WARNING "PCI-DMA: More than 4GB of RAM and no IOMMU\n"
> +	       KERN_WARNING "falling back to iommu=soft.\n");

It might also fall back to another IOMMU (Calgary, Intel, ...) 
soft is just last resort.

You can probably just remove it.

-Andi