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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
*** 437,448 ****
extern int anon_copy_ptr(struct anon_hdr *, ulong_t,
struct anon_hdr *, ulong_t, pgcnt_t, int);
extern pgcnt_t anon_grow(struct anon_hdr *, ulong_t *, pgcnt_t, pgcnt_t, int);
extern void anon_array_enter(struct anon_map *, ulong_t,
anon_sync_obj_t *);
- extern int anon_array_try_enter(struct anon_map *, ulong_t,
- anon_sync_obj_t *);
extern void anon_array_exit(anon_sync_obj_t *);
/*
* anon_resv checks to see if there is enough swap space to fulfill a
* request and if so, reserves the appropriate anonymous memory resources.
--- 437,446 ----