> the same time. I thought Plan 9's approach eliminated that by keeping a > distinct instance of the stack for each imported /net.
not quite. referencing '#In' for the first time will cause the nth ip stack to be created. subsequent references do not create a copy. it's also important to note that import doesn't operate on devices directly (except in the degnerate case of '#D' for some device D). import builds a new namespace according to the recipie in /lib/namespace (cf. namepace(6)) on the importee. so /net references that namespace, not a device. obviously '#t' still references a device on the importee. - erik
