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SubjectRe: DMA error when sg->offset value is greater than PAGE_SIZE in Intel IOMMU
Thanks for trying that Harsh. 

sp_off turns of super page support. Which this mode, do you still see offsets greater than 4k?

On Thu, Sep 28, 2017 at 07:08:21PM +0530, Harsh Jain wrote:
>
>
> Today I tried with "Intel_iommu=sp_off" boot option. Traffic runs without any error for more than 1 hrs. What magic this option did? :)

Cheers,
Ashok

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