It sounds like my understanding of the different 4.1x versions is just mistaken. If 4.1c had FFS and sockets, the kernel on which V8 was built must have been an earlier 4.1x. I believe the reason for adopting that kernel, rather than sticking with 32/V, was exactly to get paging support. There was a competing 32/V descendant with paging, written by John Reiser at Holmdel, which I gather was thought by many to be much cleaner technically; e.g. he unified the block-device buffer cache and the memory-page cache, and implemented copy-on-write paging rather than resorting to the messy vfork. I have heard that there was considerable argument and hand-wringing over whether to use Reiser's kernel or the BSD one. It all happened well before I arrived, and I don't know what the tradeoffs were, though one was certainly that Reiser's management didn't support his work and nobody in 1127 was keen to have to take it over. Norman Wilson Toronto ON