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remove whole-process swapping
Long before Unix supported paging, it used process swapping to reclaim
memory. The code is there and in theory it runs when we get *extremely* low
on memory. In practice, it never runs since the definition of low-on-memory
is antiquated. (XXX: define what antiquated means)
You can check the number of swapout/swapin events with kstats:
$ kstat -p ::vm:swapin ::vm:swapout
@@ -221,11 +221,10 @@
label_t pcb = t->t_pcb;
(void) setjmp(&t->t_pcb);
t->t_flag |= T_PANIC;
- t->t_schedflag |= TS_DONT_SWAP;
t->t_bound_cpu = cp;
t->t_preempt++;
panic_enter_hw(s);