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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
@@ -166,17 +166,10 @@
extern boolean_t tick_stick_emulation_active;
#endif /* sun4v */
CPU_STATS_ADDQ(CPU, sys, trap, 1);
-#ifdef SF_ERRATA_23 /* call causes illegal-insn */
- ASSERT((curthread->t_schedflag & TS_DONT_SWAP) ||
- (type == T_UNIMP_INSTR));
-#else
- ASSERT(curthread->t_schedflag & TS_DONT_SWAP);
-#endif /* SF_ERRATA_23 */
-
if (USERMODE(rp->r_tstate) || (type & T_USER)) {
/*
* Set lwp_state before trying to acquire any
* adaptive lock
*/
@@ -1370,12 +1363,10 @@
uint32_t inst;
utrap_handler_t *utrapp;
CPU_STATS_ADDQ(CPU, sys, trap, 1);
- ASSERT(curthread->t_schedflag & TS_DONT_SWAP);
-
if (USERMODE(rp->r_tstate)) {
/*
* Set lwp_state before trying to acquire any
* adaptive lock
*/