Author: des
Date: Tue Sep 4 21:06:53 2012
New Revision: 240105
URL: http://svn.freebsd.org/changeset/base/240105
Log:
Revert previous commit, which was performed in the wrong tree.
Modified:
head/sys/vm/swap_pager.c
Modified: head/sys/vm/swap_pager.c
==============================================================================
--- head/sys/vm/swap_pager.c Tue Sep 4 21:02:57 2012 (r240104)
+++ head/sys/vm/swap_pager.c Tue Sep 4 21:06:53 2012 (r240105)
@@ -50,7 +50,7 @@
*
* - on the fly reallocation of swap during putpages. The new system
* does not try to keep previously allocated swap blocks for dirty
- * pages.
+ * pages.
*
* - on the fly deallocation of swap
*
@@ -154,21 +154,15 @@ int swap_pager_avail;
static int swdev_syscall_active = 0; /* serialize swap(on|off) */
static vm_ooffset_t swap_total;
-SYSCTL_QUAD(_vm, OID_AUTO, swap_total, CTLFLAG_RD, &swap_total, 0,
+SYSCTL_QUAD(_vm, OID_AUTO, swap_total, CTLFLAG_RD, &swap_total, 0,
"Total amount of available swap storage.");
static vm_ooffset_t swap_reserved;
-SYSCTL_QUAD(_vm, OID_AUTO, swap_reserved, CTLFLAG_RD, &swap_reserved, 0,
+SYSCTL_QUAD(_vm, OID_AUTO, swap_reserved, CTLFLAG_RD, &swap_reserved, 0,
"Amount of swap storage needed to back all allocated anonymous memory.");
static int overcommit = 0;
-SYSCTL_INT(_vm, OID_AUTO, overcommit, CTLFLAG_RW, &overcommit, 0,
+SYSCTL_INT(_vm, OID_AUTO, overcommit, CTLFLAG_RW, &overcommit, 0,
"Configure virtual memory overcommit behavior. See tuning(7) "
"for details.");
-static unsigned long swzone;
-SYSCTL_ULONG(_vm, OID_AUTO, swzone, CTLFLAG_RD, &swzone, 0,
- "Actual size of swap metadata zone");
-static unsigned long swap_maxpages;
-SYSCTL_ULONG(_vm, OID_AUTO, swap_maxpages, CTLFLAG_RD, &swap_maxpages, 0,
- "Maximum amount of swap supported");
/* bits from overcommit */
#define SWAP_RESERVE_FORCE_ON (1 << 0)
@@ -190,7 +184,7 @@ swap_reserve_by_cred(vm_ooffset_t incr,
static int curfail;
static struct timeval lastfail;
struct uidinfo *uip;
-
+
uip = cred->cr_ruidinfo;
if (incr & PAGE_MASK)
@@ -291,7 +285,7 @@ void
swap_release_by_cred(vm_ooffset_t decr, struct ucred *cred)
{
struct uidinfo *uip;
-
+
uip = cred->cr_ruidinfo;
if (decr & PAGE_MASK)
@@ -334,7 +328,7 @@ static struct sx sw_alloc_sx;
SYSCTL_INT(_vm, OID_AUTO, swap_async_max,
- CTLFLAG_RW, &swap_async_max, 0, "Maximum running async swap ops");
+ CTLFLAG_RW, &swap_async_max, 0, "Maximum running async swap ops");
/*
* "named" and "unnamed" anon region objects. Try to reduce the overhead
@@ -346,7 +340,7 @@ SYSCTL_INT(_vm, OID_AUTO, swap_async_max
#define NOBJLIST(handle) \
(&swap_pager_object_list[((int)(intptr_t)handle >> 4) & (NOBJLISTS-1)])
-static struct mtx sw_alloc_mtx; /* protect list manipulation */
+static struct mtx sw_alloc_mtx; /* protect list manipulation */
static struct pagerlst swap_pager_object_list[NOBJLISTS];
static uma_zone_t swap_zone;
static struct vm_object swap_zone_obj;
@@ -425,7 +419,7 @@ swp_pager_free_nrpage(vm_page_t m)
/*
* SWP_SIZECHECK() - update swap_pager_full indication
- *
+ *
* update the swap_pager_almost_full indication and warn when we are
* about to run out of swap space, using lowat/hiwat hysteresis.
*
@@ -480,7 +474,7 @@ swp_pager_hash(vm_object_t object, vm_pi
/*
* SWAP_PAGER_INIT() - initialize the swap pager!
*
- * Expected to be started from system init. NOTE: This code is run
+ * Expected to be started from system init. NOTE: This code is run
* before much else so be careful what you depend on. Most of the VM
* system has yet to be initialized at this point.
*/
@@ -512,7 +506,7 @@ swap_pager_init(void)
void
swap_pager_swap_init(void)
{
- unsigned long n, n2;
+ int n, n2;
/*
* Number of in-transit swap bp operations. Don't
@@ -525,7 +519,7 @@ swap_pager_swap_init(void)
* MAX_PAGEOUT_CLUSTER. Also be aware that swap ops are
* constrained by the swap device interleave stripe size.
*
- * Currently we hardwire nsw_wcount_async to 4. This limit is
+ * Currently we hardwire nsw_wcount_async to 4. This limit is
* designed to prevent other I/O from having high latencies due to
* our pageout I/O. The value 4 works well for one or two active swap
* devices but is probably a little low if you have more. Even so,
@@ -554,11 +548,11 @@ swap_pager_swap_init(void)
n = cnt.v_page_count / 2;
if (maxswzone && n > maxswzone / sizeof(struct swblock))
n = maxswzone / sizeof(struct swblock);
+ n2 = n;
swap_zone = uma_zcreate("SWAPMETA", sizeof(struct swblock), NULL, NULL,
NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE | UMA_ZONE_VM);
if (swap_zone == NULL)
panic("failed to create swap_zone.");
- n2 = n;
do {
if (uma_zone_set_obj(swap_zone, &swap_zone_obj, n))
break;
@@ -569,13 +563,12 @@ swap_pager_swap_init(void)
n -= ((n + 2) / 3);
} while (n > 0);
if (n2 != n)
- printf("Swap zone entries reduced from %lu to %lu.\n", n2, n);
- swap_maxpages = n * SWAP_META_PAGES;
- swzone = n * sizeof(struct swblock);
+ printf("Swap zone entries reduced from %d to %d.\n", n2, n);
+ n2 = n;
/*
* Initialize our meta-data hash table. The swapper does not need to
- * be quite as efficient as the VM system, so we do not use an
+ * be quite as efficient as the VM system, so we do not use an
* oversized hash table.
*
* n: size of hash table, must be power of 2
@@ -661,7 +654,7 @@ swap_pager_alloc(void *handle, vm_ooffse
/*
* SWAP_PAGER_DEALLOC() - remove swap metadata from object
*
- * The swap backing for the object is destroyed. The code is
+ * The swap backing for the object is destroyed. The code is
* designed such that we can reinstantiate it later, but this
* routine is typically called only when the entire object is
* about to be destroyed.
@@ -686,7 +679,7 @@ swap_pager_dealloc(vm_object_t object)
vm_object_pip_wait(object, "swpdea");
/*
- * Free all remaining metadata. We only bother to free it from
+ * Free all remaining metadata. We only bother to free it from
* the swap meta data. We do not attempt to free swapblk's still
* associated with vm_page_t's for this object. We do not care
* if paging is still in progress on some objects.
@@ -755,7 +748,7 @@ swp_pager_isondev(daddr_t blk, struct sw
return (blk >= sp->sw_first && blk < sp->sw_end);
}
-
+
static void
swp_pager_strategy(struct buf *bp)
{
@@ -771,10 +764,10 @@ swp_pager_strategy(struct buf *bp)
}
panic("Swapdev not found");
}
-
+
/*
- * SWP_PAGER_FREESWAPSPACE() - free raw swap space
+ * SWP_PAGER_FREESWAPSPACE() - free raw swap space
*
* This routine returns the specified swap blocks back to the bitmap.
*
@@ -792,7 +785,7 @@ swp_pager_freeswapspace(daddr_t blk, int
/*
* If we are attempting to stop swapping on
* this device, we don't want to mark any
- * blocks free lest they be reused.
+ * blocks free lest they be reused.
*/
if ((sp->sw_flags & SW_CLOSING) == 0) {
blist_free(sp->sw_blist, blk - sp->sw_first,
@@ -815,8 +808,8 @@ swp_pager_freeswapspace(daddr_t blk, int
*
* This routine removes swapblk assignments from swap metadata.
*
- * The external callers of this routine typically have already destroyed
- * or renamed vm_page_t's associated with this range in the object so
+ * The external callers of this routine typically have already destroyed
+ * or renamed vm_page_t's associated with this range in the object so
* we should be ok.
*/
void
@@ -830,7 +823,7 @@ swap_pager_freespace(vm_object_t object,
/*
* SWAP_PAGER_RESERVE() - reserve swap blocks in object
*
- * Assigns swap blocks to the specified range within the object. The
+ * Assigns swap blocks to the specified range within the object. The
* swap blocks are not zerod. Any previous swap assignment is destroyed.
*
* Returns 0 on success, -1 on failure.
@@ -876,7 +869,7 @@ swap_pager_reserve(vm_object_t object, v
*
* This routine is allowed to sleep. It may sleep allocating metadata
* indirectly through swp_pager_meta_build() or if paging is still in
- * progress on the source.
+ * progress on the source.
*
* The source object contains no vm_page_t's (which is just as well)
*
@@ -895,8 +888,8 @@ swap_pager_copy(vm_object_t srcobject, v
VM_OBJECT_LOCK_ASSERT(dstobject, MA_OWNED);
/*
- * If destroysource is set, we remove the source object from the
- * swap_pager internal queue now.
+ * If destroysource is set, we remove the source object from the
+ * swap_pager internal queue now.
*/
if (destroysource) {
if (srcobject->handle != NULL) {
@@ -932,7 +925,7 @@ swap_pager_copy(vm_object_t srcobject, v
daddr_t srcaddr;
srcaddr = swp_pager_meta_ctl(
- srcobject,
+ srcobject,
i + offset,
SWM_POP
);
@@ -954,7 +947,7 @@ swap_pager_copy(vm_object_t srcobject, v
* Destination has valid swapblk or it is represented
* by a resident page. We destroy the sourceblock.
*/
-
+
swp_pager_meta_ctl(srcobject, i + offset, SWM_FREE);
}
}
@@ -1049,7 +1042,7 @@ swap_pager_haspage(vm_object_t object, v
* SWAP_PAGER_PAGE_UNSWAPPED() - remove swap backing store related to page
*
* This removes any associated swap backing store, whether valid or
- * not, from the page.
+ * not, from the page.
*
* This routine is typically called when a page is made dirty, at
* which point any associated swap can be freed. MADV_FREE also
@@ -1078,7 +1071,7 @@ swap_pager_unswapped(vm_page_t m)
* a chunk surrounding m[reqpage] as is contiguous in swap and which
* belongs to the same object.
*
- * The code is designed for asynchronous operation and
+ * The code is designed for asynchronous operation and
* immediate-notification of 'reqpage' but tends not to be
* used that way. Please do not optimize-out this algorithmic
* feature, I intend to improve on it in the future.
@@ -1108,7 +1101,7 @@ swap_pager_getpages(vm_object_t object,
* Calculate range to retrieve. The pages have already been assigned
* their swapblks. We require a *contiguous* range but we know it to
* not span devices. If we do not supply it, bad things
- * happen. Note that blk, iblk & jblk can be SWAPBLK_NONE, but the
+ * happen. Note that blk, iblk & jblk can be SWAPBLK_NONE, but the
* loops are set up such that the case(s) are handled implicitly.
*
* The swp_*() calls must be made with the object locked.
@@ -1146,7 +1139,7 @@ swap_pager_getpages(vm_object_t object,
}
/*
- * Return VM_PAGER_FAIL if we have nothing to do. Return mreq
+ * Return VM_PAGER_FAIL if we have nothing to do. Return mreq
* still busy, but the others unbusied.
*/
if (blk == SWAPBLK_NONE)
@@ -1241,21 +1234,21 @@ swap_pager_getpages(vm_object_t object,
/*
* A final note: in a low swap situation, we cannot deallocate swap
* and mark a page dirty here because the caller is likely to mark
- * the page clean when we return, causing the page to possibly revert
+ * the page clean when we return, causing the page to possibly revert
* to all-zero's later.
*/
}
/*
- * swap_pager_putpages:
+ * swap_pager_putpages:
*
* Assign swap (if necessary) and initiate I/O on the specified pages.
*
* We support both OBJT_DEFAULT and OBJT_SWAP objects. DEFAULT objects
* are automatically converted to SWAP objects.
*
- * In a low memory situation we may block in VOP_STRATEGY(), but the new
- * vm_page reservation system coupled with properly written VFS devices
+ * In a low memory situation we may block in VOP_STRATEGY(), but the new
+ * vm_page reservation system coupled with properly written VFS devices
* should ensure that no low-memory deadlock occurs. This is an area
* which needs work.
*
@@ -1276,8 +1269,8 @@ swap_pager_putpages(vm_object_t object,
int n = 0;
if (count && m[0]->object != object) {
- panic("swap_pager_putpages: object mismatch %p/%p",
- object,
+ panic("swap_pager_putpages: object mismatch %p/%p",
+ object,
m[0]->object
);
}
@@ -1299,7 +1292,7 @@ swap_pager_putpages(vm_object_t object,
/*
* Step 2
*
- * Update nsw parameters from swap_async_max sysctl values.
+ * Update nsw parameters from swap_async_max sysctl values.
* Do not let the sysop crash the machine with bogus numbers.
*/
mtx_lock(&pbuf_mtx);
@@ -1391,7 +1384,7 @@ swap_pager_putpages(vm_object_t object,
vm_page_t mreq = m[i+j];
swp_pager_meta_build(
- mreq->object,
+ mreq->object,
mreq->pindex,
blk + j
);
@@ -1460,10 +1453,10 @@ swap_pager_putpages(vm_object_t object,
* Completion routine for asynchronous reads and writes from/to swap.
* Also called manually by synchronous code to finish up a bp.
*
- * For READ operations, the pages are VPO_BUSY'd. For WRITE operations,
- * the pages are vm_page_t->busy'd. For READ operations, we VPO_BUSY
- * unbusy all pages except the 'main' request page. For WRITE
- * operations, we vm_page_t->busy'd unbusy all pages ( we can do this
+ * For READ operations, the pages are VPO_BUSY'd. For WRITE operations,
+ * the pages are vm_page_t->busy'd. For READ operations, we VPO_BUSY
+ * unbusy all pages except the 'main' request page. For WRITE
+ * operations, we vm_page_t->busy'd unbusy all pages ( we can do this
* because we marked them all VM_PAGER_PEND on return from putpages ).
*
* This routine may not sleep.
@@ -1482,7 +1475,7 @@ swp_pager_async_iodone(struct buf *bp)
"swap_pager: I/O error - %s failed; blkno %ld,"
"size %ld, error %d\n",
((bp->b_iocmd == BIO_READ) ? "pagein" : "pageout"),
- (long)bp->b_blkno,
+ (long)bp->b_blkno,
(long)bp->b_bcount,
bp->b_error
);
@@ -1502,7 +1495,7 @@ swp_pager_async_iodone(struct buf *bp)
* cleanup pages. If an error occurs writing to swap, we are in
* very serious trouble. If it happens to be a disk error, though,
* we may be able to recover by reassigning the swap later on. So
- * in this case we remove the m->swapblk assignment for the page
+ * in this case we remove the m->swapblk assignment for the page
* but do not free it in the rlist. The errornous block(s) are thus
* never reallocated as swap. Redirty the page and continue.
*/
@@ -1515,7 +1508,7 @@ swp_pager_async_iodone(struct buf *bp)
/*
* If an error occurs I'd love to throw the swapblk
* away without freeing it back to swapspace, so it
- * can never be used again. But I can't from an
+ * can never be used again. But I can't from an
* interrupt.
*/
if (bp->b_iocmd == BIO_READ) {
@@ -1524,7 +1517,7 @@ swp_pager_async_iodone(struct buf *bp)
* locked for the parent, but all other
* pages can be freed. We still want to
* wakeup the parent waiting on the page,
- * though. ( also: pg_reqpage can be -1 and
+ * though. ( also: pg_reqpage can be -1 and
* not match anything ).
*
* We have to wake specifically requested pages
@@ -1541,7 +1534,7 @@ swp_pager_async_iodone(struct buf *bp)
else
vm_page_flash(m);
/*
- * If i == bp->b_pager.pg_reqpage, do not wake
+ * If i == bp->b_pager.pg_reqpage, do not wake
* the page up. The caller needs to.
*/
} else {
@@ -1558,7 +1551,7 @@ swp_pager_async_iodone(struct buf *bp)
}
} else if (bp->b_iocmd == BIO_READ) {
/*
- * NOTE: for reads, m->dirty will probably be
+ * NOTE: for reads, m->dirty will probably be
* overridden by the original caller of getpages so
* we cannot set them in order to free the underlying
* swap in a low-swap situation. I don't think we'd
@@ -1570,7 +1563,7 @@ swp_pager_async_iodone(struct buf *bp)
*
* Note that the requested page, reqpage, is left
* busied, but we still have to wake it up. The
- * other pages are released (unbusied) by
+ * other pages are released (unbusied) by
* vm_page_wakeup().
*/
KASSERT(!pmap_page_is_mapped(m),
@@ -1584,7 +1577,7 @@ swp_pager_async_iodone(struct buf *bp)
* up too because we cleared VPO_SWAPINPROG and
* could be waiting for it in getpages. However,
* be sure to not unbusy getpages specifically
- * requested page - getpages expects it to be
+ * requested page - getpages expects it to be
* left busy.
*/
if (i != bp->b_pager.pg_reqpage) {
@@ -1597,7 +1590,7 @@ swp_pager_async_iodone(struct buf *bp)
} else {
/*
* For write success, clear the dirty
- * status, then finish the I/O ( which decrements the
+ * status, then finish the I/O ( which decrements the
* busy count and possibly wakes waiter's up ).
*/
KASSERT(!pmap_page_is_write_mapped(m),
@@ -1622,8 +1615,8 @@ swp_pager_async_iodone(struct buf *bp)
VM_OBJECT_UNLOCK(object);
}
- /*
- * swapdev_strategy() manually sets b_vp and b_bufobj before calling
+ /*
+ * swapdev_strategy() manually sets b_vp and b_bufobj before calling
* bstrategy(). Set them back to NULL now we're done with it, or we'll
* trigger a KASSERT in relpbuf().
*/
@@ -1635,10 +1628,10 @@ swp_pager_async_iodone(struct buf *bp)
* release the physical I/O buffer
*/
relpbuf(
- bp,
- ((bp->b_iocmd == BIO_READ) ? &nsw_rcount :
- ((bp->b_flags & B_ASYNC) ?
- &nsw_wcount_async :
+ bp,
+ ((bp->b_iocmd == BIO_READ) ? &nsw_rcount :
+ ((bp->b_flags & B_ASYNC) ?
+ &nsw_wcount_async :
&nsw_wcount_sync
)
)
@@ -1751,8 +1744,8 @@ restart:
for (swap = swhash[i]; swap != NULL; swap = swap->swb_hnext) {
vm_object_t object = swap->swb_object;
vm_pindex_t pindex = swap->swb_index;
- for (j = 0; j < SWAP_META_PAGES; ++j) {
- if (swp_pager_isondev(swap->swb_pages[j], sp)) {
+ for (j = 0; j < SWAP_META_PAGES; ++j) {
+ if (swp_pager_isondev(swap->swb_pages[j], sp))
{
/* avoid deadlock */
if (!VM_OBJECT_TRYLOCK(object)) {
break;
@@ -1765,7 +1758,7 @@ restart:
goto restart;
}
}
- }
+ }
}
}
mtx_unlock(&swhash_mtx);
@@ -1790,7 +1783,7 @@ restart:
* SWAP META DATA *
************************************************************************
*
- * These routines manipulate the swap metadata stored in the
+ * These routines manipulate the swap metadata stored in the
* OBJT_SWAP object.
*
* Swap metadata is implemented with a global hash and not directly
@@ -1828,13 +1821,13 @@ swp_pager_meta_build(vm_object_t object,
mtx_lock(&sw_alloc_mtx);
TAILQ_INSERT_TAIL(
NOBJLIST(object->handle),
- object,
+ object,
pager_object_list
);
mtx_unlock(&sw_alloc_mtx);
}
}
-
+
/*
* Locate hash entry. If not found create, but if we aren't adding
* anything just return. If we run out of space in the map we wait
@@ -1855,7 +1848,7 @@ retry:
mtx_unlock(&swhash_mtx);
VM_OBJECT_UNLOCK(object);
if (uma_zone_exhausted(swap_zone)) {
- if (atomic_cmpset_int(&exhausted, 0, 1))
+ if (atomic_cmpset_rel_int(&exhausted, 0, 1))
printf("swap zone exhausted, "
"increase kern.maxswzone\n");
vm_pageout_oom(VM_OOM_SWAPZ);
@@ -1866,7 +1859,7 @@ retry:
goto retry;
}
- if (atomic_cmpset_int(&exhausted, 1, 0))
+ if (atomic_cmpset_rel_int(&exhausted, 1, 0))
printf("swap zone ok\n");
swap->swb_hnext = NULL;
@@ -1903,10 +1896,10 @@ done:
/*
* SWP_PAGER_META_FREE() - free a range of blocks in the object's swap metadata
*
- * The requested range of blocks is freed, with any associated swap
+ * The requested range of blocks is freed, with any associated swap
* returned to the swap bitmap.
*
- * This routine will free swap metadata structures as they are cleaned
+ * This routine will free swap metadata structures as they are cleaned
* out. This routine does *NOT* operate on swap metadata associated
* with resident pages.
*/
@@ -1998,14 +1991,14 @@ swp_pager_meta_free_all(vm_object_t obje
* swapblk assignments in the swap meta data or in the vm_page_t.
* The routine typically returns the swapblk being looked-up, or popped,
* or SWAPBLK_NONE if the block was freed, or SWAPBLK_NONE if the block
- * was invalid. This routine will automatically free any invalid
+ * was invalid. This routine will automatically free any invalid
* meta-data swapblks.
*
* It is not possible to store invalid swapblks in the swap meta data
* (other then a literal 'SWAPBLK_NONE'), so we don't bother checking.
*
- * When acting on a busy resident page and paging is in progress, we
- * have to wait until paging is complete but otherwise can act on the
+ * When acting on a busy resident page and paging is in progress, we
+ * have to wait until paging is complete but otherwise can act on the
* busy page.
*
* SWM_FREE remove and free swap block from metadata
@@ -2021,7 +2014,7 @@ swp_pager_meta_ctl(vm_object_t object, v
VM_OBJECT_LOCK_ASSERT(object, MA_OWNED);
/*
- * The meta data only exists of the object is OBJT_SWAP
+ * The meta data only exists of the object is OBJT_SWAP
* and even then might not be allocated yet.
*/
if (object->type != OBJT_SWAP)
@@ -2047,7 +2040,7 @@ swp_pager_meta_ctl(vm_object_t object, v
uma_zfree(swap_zone, swap);
--object->un_pager.swp.swp_bcount;
}
- }
+ }
}
}
mtx_unlock(&swhash_mtx);
@@ -2065,7 +2058,7 @@ struct swapon_args {
};
#endif
-/*
+/*
* MPSAFE
*/
/* ARGSUSED */
@@ -2160,7 +2153,7 @@ swaponsomething(struct vnode *vp, void *
/*
* nblks is in DEV_BSIZE'd chunks, convert to PAGE_SIZE'd chunks.
* First chop nblks off to page-align it, then convert.
- *
+ *
* sw->sw_nblks is in page-sized chunks now too.
*/
nblks &= ~(ctodb(1) - 1);
@@ -2349,12 +2342,12 @@ swapoff_all(void)
struct swdevt *sp, *spt;
const char *devname;
int error;
-
+
mtx_lock(&Giant);
while (swdev_syscall_active)
tsleep(&swdev_syscall_active, PUSER - 1, "swpoff", 0);
swdev_syscall_active = 1;
-
+
mtx_lock(&sw_dev_mtx);
TAILQ_FOREACH_SAFE(sp, &swtailq, sw_list, spt) {
mtx_unlock(&sw_dev_mtx);
@@ -2372,7 +2365,7 @@ swapoff_all(void)
mtx_lock(&sw_dev_mtx);
}
mtx_unlock(&sw_dev_mtx);
-
+
swdev_syscall_active = 0;
wakeup_one(&swdev_syscall_active);
mtx_unlock(&Giant);
@@ -2716,7 +2709,7 @@ swaponvp(struct thread *td, struct vnode
}
}
mtx_unlock(&sw_dev_mtx);
-
+
(void) vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
#ifdef MAC
error = mac_system_check_swapon(td->td_ucred, vp);
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