>Is there a reason why BusyBox's [reboot] implementation is different, or is it >a bug? None of the above? A sync(2) call, wherever found, is not the be-all and end-all of filesystem cleanup. It just gets the fs cache-cleaning party started. More than one is just fine, even zero is fine. It's mostly just trying to help provide data-loss insurance against an unlikely kernel crash during the shutdown phase. The final fs cleanup, and the only one that really counts, is what the kernel does after init(8) exits.
-- Jim
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