On Wed, Nov 02, 2005 at 06:04:25PM -0500, Daniel Veillard wrote:
> I'm not a kernel hacker, but if you give me a patch displaying those
> informations at the IOMMU_BUG_ON pointed by Steven, I will gladly rebuild
> and try to reboot over it to give you the informations (I have no serial
> so hint on avoiding the instant reboot of the dom0 would help). Oh yeah
> it's just dom0 on top of the hypervisor, no domU even started.
Hi Daniel,
could you try the following patch just to have a bit more information
about the pointer and the size ?
diff -r ca2e91ab4311 linux-2.6-xen-sparse/arch/xen/i386/kernel/pci-dma.c
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/pci-dma.c Thu Nov 3
01:45:07 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/pci-dma.c Wed Nov 2
21:32:34 2005
@@ -267,6 +267,8 @@
dma = swiotlb_map_single(dev, ptr, size, direction);
} else {
dma = virt_to_bus(ptr);
+ if (range_straddles_page_boundary(ptr, size))
+ printk("ptr: %p %zd\n", ptr, size);
IOMMU_BUG_ON(range_straddles_page_boundary(ptr, size));
IOMMU_BUG_ON(address_needs_mapping(dev, dma));
}
stick a while (1) ; after the printk would help you to avoid the reboot
something like:
if (range_straddles_page_boundary(ptr, size)) {
printk("ptr: %p %zd\n", ptr, size);
while (1);
}
Cheers,
--
Vincent Hanquez
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