Re: [PATCH 5/7] x86: remove the experimental forcesac boot option

[Thomas Gleixner]

On Fri, 25 May 2018, Christoph Hellwig wrote:

x86/pci-dma: ...

Please

> Limiting the dma mask to avoid PCI (pre-PCIe) DAC cycles while paying
> the huge overhead of an IOMMU is rather pointless, and this seriously
> gets in the way of dma mapping work.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>