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David Woodhouse wrote:
> Alternatively, just wait for the chip to become available. Or increment
> a count of 'waiters' and only interrupt the erase when there are a
> certain number of people waiting.
Sounds reasonable to me. Maybe we should even think about the block 
device plug approach: set up a timer when the first reader shows up, 
and suspend when either a certain amount of readers shows up or the 
timer has run down.