Differential D47036 Diff 145489 sys/vm/swap_pager.c

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sys/vm/swap_pager.c

Show First 20 Lines • Show All 1,956 Lines • ▼ Show 20 Lines	for (i = 0; i < SWAP_META_PAGES; i++) {
continue;		continue;
}		}

/*		/*
* Look for a page corresponding to this block. If the		* Look for a page corresponding to this block. If the
* found page has pending operations, sleep and restart		* found page has pending operations, sleep and restart
* the scan.		* the scan.
*/		*/
m = vm_page_iter_lookup(&pages, blks.index + i);		m = vm_radix_iter_lookup(&pages, blks.index + i);
if (m != NULL && (m->oflags & VPO_SWAPINPROG) != 0) {		if (m != NULL && (m->oflags & VPO_SWAPINPROG) != 0) {
m->oflags \|= VPO_SWAPSLEEP;		m->oflags \|= VPO_SWAPSLEEP;
VM_OBJECT_SLEEP(object, &object->handle, PSWP,		VM_OBJECT_SLEEP(object, &object->handle, PSWP,
"swpoff", 0);		"swpoff", 0);
break;		break;
}		}

/*		/*
▲ Show 20 Lines • Show All 404 Lines • ▼ Show 20 Lines	for (sb = swblk_iter_limit_init(&blks, object, pindex, last),
start = swblk_start(sb, pindex);		start = swblk_start(sb, pindex);
sb != NULL; sb = swblk_iter_next(&blks), start = 0) {		sb != NULL; sb = swblk_iter_next(&blks), start = 0) {
limit = MIN(last - blks.index, SWAP_META_PAGES);		limit = MIN(last - blks.index, SWAP_META_PAGES);
for (i = start; i < limit; i++) {		for (i = start; i < limit; i++) {
if (sb->d[i] == SWAPBLK_NONE)		if (sb->d[i] == SWAPBLK_NONE)
continue;		continue;
swp_pager_update_freerange(&range, sb->d[i]);		swp_pager_update_freerange(&range, sb->d[i]);
if (freed != NULL) {		if (freed != NULL) {
m = vm_page_iter_lookup(&pages, blks.index + i);		m = vm_radix_iter_lookup(&pages, blks.index + i);
if (m == NULL \|\| vm_page_none_valid(m))		if (m == NULL \|\| vm_page_none_valid(m))
fc++;		fc++;
}		}
sb->d[i] = SWAPBLK_NONE;		sb->d[i] = SWAPBLK_NONE;
}		}
if (swp_pager_swblk_empty(sb, 0, start) &&		if (swp_pager_swblk_empty(sb, 0, start) &&
swp_pager_swblk_empty(sb, limit, SWAP_META_PAGES)) {		swp_pager_swblk_empty(sb, limit, SWAP_META_PAGES)) {
swblk_iter_remove(&blks);		swblk_iter_remove(&blks);
▲ Show 20 Lines • Show All 101 Lines • ▼ Show 20 Lines
swap_pager_seek_data(vm_object_t object, vm_pindex_t pindex)		swap_pager_seek_data(vm_object_t object, vm_pindex_t pindex)
{		{
struct pctrie_iter blks, pages;		struct pctrie_iter blks, pages;
vm_page_t m;		vm_page_t m;
vm_pindex_t swap_index;		vm_pindex_t swap_index;

VM_OBJECT_ASSERT_RLOCKED(object);		VM_OBJECT_ASSERT_RLOCKED(object);
vm_page_iter_init(&pages, object);		vm_page_iter_init(&pages, object);
m = vm_page_iter_lookup_ge(&pages, pindex);		m = vm_radix_iter_lookup_ge(&pages, pindex);
if (m != NULL) {		if (m != NULL) {
if (!vm_page_any_valid(m))		if (!vm_page_any_valid(m))
m = NULL;		m = NULL;
else if (pages.index == pindex)		else if (pages.index == pindex)
return (pages.index);		return (pages.index);
}		}
swblk_iter_init_only(&blks, object);		swblk_iter_init_only(&blks, object);
swap_index = swap_pager_iter_find_least(&blks, pindex);		swap_index = swap_pager_iter_find_least(&blks, pindex);
▲ Show 20 Lines • Show All 66 Lines • ▼ Show 20 Lines	swap_pager_scan_all_shadowed(vm_object_t object)

/*		/*
* Only check pages inside the parent object's range and inside the		* Only check pages inside the parent object's range and inside the
* parent object's mapping of the backing object.		* parent object's mapping of the backing object.
*/		*/
pv = ps = pi = backing_offset_index - 1;		pv = ps = pi = backing_offset_index - 1;
for (;;) {		for (;;) {
if (pi == pv) {		if (pi == pv) {
p = vm_page_iter_lookup_ge(&backing_pages, pv + 1);		p = vm_radix_iter_lookup_ge(&backing_pages, pv + 1);
pv = p != NULL ? p->pindex : backing_object->size;		pv = p != NULL ? p->pindex : backing_object->size;
}		}
if (pi == ps)		if (pi == ps)
ps = swap_pager_iter_find_least(&backing_blks, ps + 1);		ps = swap_pager_iter_find_least(&backing_blks, ps + 1);
pi = MIN(pv, ps);		pi = MIN(pv, ps);
if (pi >= pi_ubound)		if (pi >= pi_ubound)
break;		break;

▲ Show 20 Lines • Show All 900 Lines • Show Last 20 Lines