Re: skge error; hangs w/ hardware memory hole

On Sunday 23 July 2006 08:32, Anthony DeRobertis wrote:

Andreas Kleen wrote:

quoted

You need to use iommu=soft swiotlb=force

The standard IOMMU is also broken on VIA, but forced swiotlb should
work.

Didn't work :-(

swiotlb=force is unfortunately broken right now. 

But which this patch it should work. Does it?

-Andi

Test patch only: disable DMA over 4GB

Index: linux-2.6.17-work/arch/x86_64/kernel/pci-dma.c
===================================================================

--- linux-2.6.17-work.orig/arch/x86_64/kernel/pci-dma.c
+++ linux-2.6.17-work/arch/x86_64/kernel/pci-dma.c

@@ -202,7 +202,7 @@ int dma_set_mask(struct device *dev, u64
 {
 	if (!dev->dma_mask || !dma_supported(dev, mask))
 		return -EIO;
-	*dev->dma_mask = mask;
+	*dev->dma_mask = mask & 0xffffffff;
 	return 0;
 }
 EXPORT_SYMBOL(dma_set_mask);