| From | (Eric W. Biederman) | Date | Fri, 21 Dec 2012 18:42:47 -0800 | Subject | Re: [PATCH v7 24/27] x86: Add swiotlb force off support |
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Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> writes:
> On Mon, Dec 17, 2012 at 11:15:56PM -0800, Yinghai Lu wrote: >> So use could disable swiotlb from command line, even swiotlb support >> is compiled in. Just like we have intel_iommu=on and intel_iommu=off. > > You really need to spell out why this is useful.
YH why can't we safely autodetect that the swiotlb is unusable when there is no memory below 4G free?
Eric
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