Messages in this thread | | | Date | Fri, 17 Oct 2003 18:41:11 -0700 | From | Andrew Morton <> | Subject | Re: [RFC] prevent "dd if=/dev/mem" crash |
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Matt Chapman <matthewc@cse.unsw.edu.au> 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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