linux-kernel - Re: [PATCH 0/16] DMA-API debugging facility v2

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Date:	Thu, 12 Feb 2009 16:20:27 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Joerg Roedel <joerg.roedel@....com>, fujita.tomonori@....ntt.co.jp,
	netdev@...r.kernel.org, iommu@...ts.linux-foundation.org,
	mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/16] DMA-API debugging facility v2


On Thu, Feb 05, 2009 at 10:52:32PM +0000, David Woodhouse wrote:
> This adds a function to dump the DMA mappings that the debugging code is
> aware of -- either for a single device, or for _all_ devices.
> 
> This can be useful for debugging -- sticking a call to it in the DMA
> page fault handler, for example, to see if the faulting address _should_
> be mapped or not, and hence work out whether it's IOMMU bugs we're
> seeing, or driver bugs.
> 
> I'd also like to make it answer the question 'should address X be mapped
> for device Y', but I'll get to that next.
> 
> Do we have a %pX format for printing dma_addr_t yet? 
> 
> Signed-off-by: David Woodhouse <David.Woodhouse@...el.com>
> 

Great. Thanks. Applied to my dma-api/debug branch.

Joerg
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