linux-kernel - Re: [discuss] Re: Please pull x86-64 bug fixes

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Date:	Mon, 16 Oct 2006 14:21:25 +0200
From:	Andi Kleen <ak@...e.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Jeff Garzik <jeff@...zik.org>, discuss@...-64.org,
	torvalds@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [discuss] Re: Please pull x86-64 bug fixes

On Friday 06 October 2006 13:14, Alan Cox wrote:
> Ar Iau, 2006-10-05 am 23:44 +0200, ysgrifennodd Andi Kleen:
> > I think we had that argument before. IMHO such messages are completely
> > useless. Hangs are not acceptable no matter what messages are printed
> > before.
> 
> Oh so you plan to fix the iommu/aacraid problem you always said you
> wouldn't fix ?

They don't cause hangs, just IO errors (or panics if you configure
iommu debugging)

Actually I plan to fix this one, but it will require more work.
Basically the plan is to make the current dma zone variable sized
and get rid of all GFP_DMA allocations.  Merge the current soft iommu
with that new dma allocator. Then make sure all allocations
that need such low dma use a mask argument to some allocator.

Then we can have a option to configure the size of the dma low zone.
Users of broken hardware just configure a larger size.

-Andi
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