Re: BUG in drivers/dma/ioat/dma_v2.c:314

From: David Woodhouse
Date: Wed Jun 30 2010 - 14:44:04 EST

On Wed, 2010-06-30 at 19:26 +0100, Chris Li wrote:
> The delta seems to be this line:
> ioatdma 0000:00:0f.0: ioat2_set_chainaddr: chainaddr: ffffe000

That's a reasonable address if the IOMMU is enabled. We start at 4GiB
and work down, so that's the second page given out (or the first 8KiB

It looks like the DMA is going AWOL causing the initialisation to
fail... but it's interesting that there are no DMA faults reported by
the IOMMU.

David Woodhouse Open Source Technology Centre
David.Woodhouse@xxxxxxxxx Intel Corporation

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