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SubjectRe: [RFC] prevent "dd if=/dev/mem" crash
Matt Chapman <> wrote:
> It *does* signal a fault, in the form of a machine check. On other
> architectures I'm familiar with this is usually implemented as an
> interrupt, but the idea is similar - when the system bus controller
> detects a bad address on the bus, it returns all 1s (for a read) and
> signals an interrupt.

I see. That seems OK. At least it means that software can implement a
probing function and that the time interval between hot unplug and handling
the unplug interrupt can be managed appropriately.

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