Thanks. This is the one I was thinking of, unchanged decades later: https://github.com/joyent/illumos-joyent/blob/master/usr/src/uts/common/vm/vm_pvn.c https:

Thanks. This is the one I was thinking of, unchanged decades later: https://github.com/joyent/illumos-joyent/blob/master/usr/src/uts/common/vm/vm_pvn.c https://github.com/joyent/illumos-joyent/blob/master/usr/src... 200 pages before the pager starts running maybe made sense back then, needs to be rethought now. I'm reading the code to see if anyone other that UFS uses it. Something called UDFS does but that looks like DVDs, not that interesting.