Re: In place kexec

Eric W. Biederman
2010-07-30T18:22:24Z

David Woodhouse <dwmw2@infradead.org> writes:

> On Thu, 2010-07-29 at 21:41 -0700, Eric W. Biederman wrote:
>> There isn't a bus master shut off at the core level.
>
> Effectively, there is if you have an IOMMU.

Depends on the IOMMU. There are several dinky IOMMUs that when you
shut them off DMA simply goes around them, and is not stopped.

Eric