pipes and atomic writes

[Dave Mason]

>	According to pipe(2) 'writes with count <4097 are atomic..'...
What happens if they cross a page boundary and the new page is not currently
resident on 4.2?  Will it still be atomic?  Seems difficult to me unless they
specifically check & force pages resident before starting the copy.
-- 
 -- Dave Mason, U. Toronto CSRG,
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