Re: [PATCH v7 24/27] x86: Add swiotlb force off support

[Eric W. Biederman]

Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/