diff options
Diffstat (limited to 'sys/vm/vm_glue.c')
| -rw-r--r-- | sys/vm/vm_glue.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sys/vm/vm_glue.c b/sys/vm/vm_glue.c index 6ac6a96..e38b3d3 100644 --- a/sys/vm/vm_glue.c +++ b/sys/vm/vm_glue.c @@ -91,6 +91,7 @@ #include <vm/vm_kern.h> #include <vm/vm_extern.h> #include <vm/vm_pager.h> +#include <vm/swap_pager.h> #include <sys/user.h> @@ -324,6 +325,45 @@ vm_proc_swapin(struct proc *p) up = (vm_offset_t)p->p_uarea; pmap_qenter(up, ma, UAREA_PAGES); } + +/* + * Swap in the UAREAs of all processes swapped out to the given device. + * The pages in the UAREA are marked dirty and their swap metadata is freed. + */ +void +vm_proc_swapin_all(int devidx) +{ + struct proc *p; + vm_object_t object; + vm_page_t m; + +retry: + sx_slock(&allproc_lock); + FOREACH_PROC_IN_SYSTEM(p) { + PROC_LOCK(p); + mtx_lock_spin(&sched_lock); + + object = p->p_upages_obj; + if (object != NULL && + swap_pager_isswapped(p->p_upages_obj, devidx)) { + sx_sunlock(&allproc_lock); + faultin(p); + mtx_unlock_spin(&sched_lock); + PROC_UNLOCK(p); + vm_page_lock_queues(); + TAILQ_FOREACH(m, &object->memq, listq) + vm_page_dirty(m); + vm_page_unlock_queues(); + swap_pager_freespace(object, 0, + object->un_pager.swp.swp_bcount); + goto retry; + } + + mtx_unlock_spin(&sched_lock); + PROC_UNLOCK(p); + } + sx_sunlock(&allproc_lock); +} #endif /* |
