out of swap with SCHED_ULE

[Kirill Ponomarew]

JFYI: Running "make distclean" in ports on today's current, produces
a tons of out of swap messages on console and freezes the machine.

swap_pager: out of swap space
swap_pager_getswapspace(16): failed
pid 998 (mysqld), uid 88, was killed: out of swap space
swap_pager: out of swap space

etc, though PC has 1G RAM.  Kernel is baked with SCHED_ULE.

-Kirill