/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
* Paging File Management.
*/
+#include <mach/host_priv.h>
#include <mach/memory_object_control.h>
#include <mach/memory_object_server.h>
-#include "default_pager_internal.h"
+#include <mach/upl.h>
+#include <default_pager/default_pager_internal.h>
#include <default_pager/default_pager_alerts.h>
+#include <default_pager/default_pager_object_server.h>
+
+#include <ipc/ipc_types.h>
#include <ipc/ipc_port.h>
#include <ipc/ipc_space.h>
+
+#include <kern/kern_types.h>
+#include <kern/host.h>
#include <kern/queue.h>
#include <kern/counters.h>
#include <kern/sched_prim.h>
+
#include <vm/vm_kern.h>
#include <vm/vm_pageout.h>
-/* CDY CDY */
#include <vm/vm_map.h>
+#include <vm/vm_object.h>
+#include <vm/vm_protos.h>
+
+/* LP64todo - need large internal object support */
/*
* ALLOC_STRIDE... the maximum number of bytes allocated from
#define VS_ASYNC_LOCK() mutex_lock(&default_pager_async_lock)
#define VS_ASYNC_UNLOCK() mutex_unlock(&default_pager_async_lock)
-#define VS_ASYNC_LOCK_INIT() mutex_init(&default_pager_async_lock, \
- ETAP_IO_DEV_PAGEH)
+#define VS_ASYNC_LOCK_INIT() mutex_init(&default_pager_async_lock, 0)
#define VS_ASYNC_LOCK_ADDR() (&default_pager_async_lock)
/*
* Paging Space Hysteresis triggers and the target notification port
boolean_t bs_low = FALSE;
int backing_store_release_trigger_disable = 0;
-
+
+
+/* Have we decided if swap needs to be encrypted yet ? */
+boolean_t dp_encryption_inited = FALSE;
+/* Should we encrypt swap ? */
+boolean_t dp_encryption = FALSE;
/*
unsigned int dp_pages_free = 0;
unsigned int cluster_transfer_minimum = 100;
-kern_return_t ps_write_file(paging_segment_t, upl_t, vm_offset_t, vm_offset_t, unsigned int, int); /* forward */
-kern_return_t ps_read_file (paging_segment_t, upl_t, vm_offset_t, vm_offset_t, unsigned int, unsigned int *, int); /* forward */
+/* forward declarations */
+kern_return_t ps_write_file(paging_segment_t, upl_t, upl_offset_t, vm_offset_t, unsigned int, int); /* forward */
+kern_return_t ps_read_file (paging_segment_t, upl_t, upl_offset_t, vm_offset_t, unsigned int, unsigned int *, int); /* forward */
+default_pager_thread_t *get_read_buffer( void );
+kern_return_t ps_vstruct_transfer_from_segment(
+ vstruct_t vs,
+ paging_segment_t segment,
+ upl_t upl);
+kern_return_t ps_read_device(paging_segment_t, vm_offset_t, vm_offset_t *, unsigned int, unsigned int *, int); /* forward */
+kern_return_t ps_write_device(paging_segment_t, vm_offset_t, vm_offset_t, unsigned int, struct vs_async *); /* forward */
+kern_return_t vs_cluster_transfer(
+ vstruct_t vs,
+ upl_offset_t offset,
+ upl_size_t cnt,
+ upl_t upl);
+vs_map_t vs_get_map_entry(
+ vstruct_t vs,
+ vm_offset_t offset);
default_pager_thread_t *
-get_read_buffer()
+get_read_buffer( void )
{
int i;
*/
pages_total += ps->ps_pgnum;
pages_free += ps->ps_clcount << ps->ps_clshift;
- DEBUG(DEBUG_BS_INTERNAL,
- ("segment #%d: %d total, %d free\n",
- i, ps->ps_pgnum, ps->ps_clcount << ps->ps_clshift));
+ DP_DEBUG(DEBUG_BS_INTERNAL,
+ ("segment #%d: %d total, %d free\n",
+ i, ps->ps_pgnum, ps->ps_clcount << ps->ps_clshift));
}
*totalp = pages_total;
*freep = pages_free;
void
backing_store_add(
- backing_store_t bs)
+ __unused backing_store_t bs)
{
- MACH_PORT_FACE port = bs->bs_port;
- MACH_PORT_FACE pset = default_pager_default_set;
+// MACH_PORT_FACE port = bs->bs_port;
+// MACH_PORT_FACE pset = default_pager_default_set;
kern_return_t kr = KERN_SUCCESS;
if (kr != KERN_SUCCESS)
{
backing_store_t bs;
MACH_PORT_FACE port;
- kern_return_t kr;
+// kern_return_t kr;
struct vstruct_alias *alias_struct;
if (pager != default_pager_object)
ipc_port_make_send(port);
assert (port != IP_NULL);
- DEBUG(DEBUG_BS_EXTERNAL,
- ("priority=%d clsize=%d bs_port=0x%x\n",
- priority, clsize, (int) backing_store));
+ DP_DEBUG(DEBUG_BS_EXTERNAL,
+ ("priority=%d clsize=%d bs_port=0x%x\n",
+ priority, clsize, (int) backing_store));
alias_struct = (struct vstruct_alias *)
kalloc(sizeof (struct vstruct_alias));
}
else {
ipc_port_dealloc_kernel((MACH_PORT_FACE)(port));
- kfree((vm_offset_t)bs, sizeof (struct backing_store));
+ kfree(bs, sizeof (struct backing_store));
return KERN_RESOURCE_SHORTAGE;
}
priority = BS_MINPRI;
bs->bs_priority = priority;
- bs->bs_clsize = bs_get_global_clsize(atop(clsize));
+ bs->bs_clsize = bs_get_global_clsize(atop_32(clsize));
BSL_LOCK();
queue_enter(&backing_store_list.bsl_queue, bs, backing_store_t,
basic->bs_pages_out_fail= bs->bs_pages_out_fail;
basic->bs_priority = bs->bs_priority;
- basic->bs_clsize = ptoa(bs->bs_clsize); /* in bytes */
+ basic->bs_clsize = ptoa_32(bs->bs_clsize); /* in bytes */
BS_UNLOCK(bs);
int count;
upl_t upl;
- transfer_object = vm_object_allocate(VM_SUPER_CLUSTER);
+ transfer_object = vm_object_allocate((vm_object_size_t)VM_SUPER_CLUSTER);
count = 0;
error = vm_object_upl_request(transfer_object,
(vm_object_offset_t)0, VM_SUPER_CLUSTER,
if(error == KERN_SUCCESS) {
error = ps_vstruct_transfer_from_segment(
vs, ps, upl);
- upl_commit(upl, NULL);
+ upl_commit(upl, NULL, 0);
upl_deallocate(upl);
} else {
error = KERN_FAILURE;
paging_segment_t ps;
int error;
int interim_pages_removed = 0;
- kern_return_t kr;
+// kern_return_t kr;
if ((bs = backing_store_lookup(backing_store)) == BACKING_STORE_NULL)
return KERN_INVALID_ARGUMENT;
paging_segments[i] = PAGING_SEGMENT_NULL;
paging_segment_count--;
PS_LOCK(ps);
- kfree((vm_offset_t)ps->ps_bmap,
- RMAPSIZE(ps->ps_ncls));
- kfree((vm_offset_t)ps, sizeof *ps);
+ kfree(ps->ps_bmap, RMAPSIZE(ps->ps_ncls));
+ kfree(ps, sizeof *ps);
}
}
}
* Disable lookups of this backing store.
*/
if((void *)bs->bs_port->alias != NULL)
- kfree((vm_offset_t) bs->bs_port->alias,
- sizeof (struct vstruct_alias));
+ kfree((void *) bs->bs_port->alias,
+ sizeof (struct vstruct_alias));
ipc_port_dealloc_kernel((ipc_port_t) (bs->bs_port));
bs->bs_port = MACH_PORT_NULL;
BS_UNLOCK(bs);
/*
* Free the backing store structure.
*/
- kfree((vm_offset_t)bs, sizeof *bs);
+ kfree(bs, sizeof *bs);
return KERN_SUCCESS;
}
PS_LOCK_INIT(ps);
ps->ps_bmap = (unsigned char *) kalloc(RMAPSIZE(ps->ps_ncls));
if (!ps->ps_bmap) {
- kfree((vm_offset_t)ps, sizeof *ps);
+ kfree(ps, sizeof *ps);
BS_UNLOCK(bs);
return KERN_RESOURCE_SHORTAGE;
}
ps->ps_bs = bs;
if ((error = ps_enter(ps)) != 0) {
- kfree((vm_offset_t)ps->ps_bmap, RMAPSIZE(ps->ps_ncls));
- kfree((vm_offset_t)ps, sizeof *ps);
+ kfree(ps->ps_bmap, RMAPSIZE(ps->ps_ncls));
+ kfree(ps, sizeof *ps);
BS_UNLOCK(bs);
return KERN_RESOURCE_SHORTAGE;
}
bs_more_space(ps->ps_clcount);
- DEBUG(DEBUG_BS_INTERNAL,
- ("device=0x%x,offset=0x%x,count=0x%x,record_size=0x%x,shift=%d,total_size=0x%x\n",
- device, offset, count, record_size,
- ps->ps_record_shift, ps->ps_pgnum));
+ DP_DEBUG(DEBUG_BS_INTERNAL,
+ ("device=0x%x,offset=0x%x,count=0x%x,record_size=0x%x,shift=%d,total_size=0x%x\n",
+ device, offset, count, record_size,
+ ps->ps_record_shift, ps->ps_pgnum));
return KERN_SUCCESS;
}
{
struct vs_async *vsa;
MACH_PORT_FACE reply_port;
- kern_return_t kr;
+// kern_return_t kr;
VS_ASYNC_LOCK();
if (vs_async_free_list == NULL) {
vs_alloc_async_failed++;
ipc_port_dealloc_kernel((MACH_PORT_FACE)
(reply_port));
- kfree((vm_offset_t)vsa,
- sizeof (struct vs_async));
+ kfree(vsa, sizeof (struct vs_async));
vsa = NULL;
}
}
vs_alloc_async_failed++;
ipc_port_dealloc_kernel((MACH_PORT_FACE)
(reply_port));
- kfree((vm_offset_t) vsa,
- sizeof (struct vs_async));
+ kfree(vsa, sizeof (struct vs_async));
vsa = NULL;
}
}
kern_return_t kr;
reply_port = vsa->reply_port;
- kfree((vm_offset_t) reply_port->alias, sizeof (struct vstuct_alias));
- kfree((vm_offset_t) vsa, sizeof (struct vs_async));
+ kfree(reply_port->alias, sizeof (struct vstuct_alias));
+ kfree(vsa, sizeof (struct vs_async));
ipc_port_dealloc_kernel((MACH_PORT_FACE) (reply_port));
#if 0
VS_ASYNC_LOCK();
vm_size_t size)
{
vstruct_t vs;
- int i;
+ unsigned int i;
vs = (vstruct_t) zalloc(vstruct_zone);
if (vs == VSTRUCT_NULL) {
vs->vs_waiting_write = FALSE;
vs->vs_waiting_async = FALSE;
#else
- mutex_init(&vs->vs_waiting_seqno, ETAP_DPAGE_VSSEQNO);
- mutex_init(&vs->vs_waiting_read, ETAP_DPAGE_VSREAD);
- mutex_init(&vs->vs_waiting_write, ETAP_DPAGE_VSWRITE);
- mutex_init(&vs->vs_waiting_refs, ETAP_DPAGE_VSREFS);
- mutex_init(&vs->vs_waiting_async, ETAP_DPAGE_VSASYNC);
+ mutex_init(&vs->vs_waiting_seqno, 0);
+ mutex_init(&vs->vs_waiting_read, 0);
+ mutex_init(&vs->vs_waiting_write, 0);
+ mutex_init(&vs->vs_waiting_refs, 0);
+ mutex_init(&vs->vs_waiting_async, 0);
#endif
vs->vs_readers = 0;
vs->vs_errors = 0;
vs->vs_clshift = local_log2(bs_get_global_clsize(0));
- vs->vs_size = ((atop(round_page(size)) - 1) >> vs->vs_clshift) + 1;
+ vs->vs_size = ((atop_32(round_page_32(size)) - 1) >> vs->vs_clshift) + 1;
vs->vs_async_pending = 0;
/*
vs->vs_indirect = FALSE;
}
vs->vs_xfer_pending = FALSE;
- DEBUG(DEBUG_VS_INTERNAL,
- ("map=0x%x, indirect=%d\n", (int) vs->vs_dmap, vs->vs_indirect));
+ DP_DEBUG(DEBUG_VS_INTERNAL,
+ ("map=0x%x, indirect=%d\n", (int) vs->vs_dmap, vs->vs_indirect));
/*
* Check to see that we got the space.
*/
if (!vs->vs_dmap) {
- kfree((vm_offset_t)vs, sizeof *vs);
+ kfree(vs, sizeof *vs);
return VSTRUCT_NULL;
}
return vs;
}
-paging_segment_t ps_select_segment(int, int *); /* forward */
+paging_segment_t ps_select_segment(unsigned int, int *); /* forward */
paging_segment_t
ps_select_segment(
- int shift,
- int *psindex)
+ unsigned int shift,
+ int *psindex)
{
paging_segment_t ps;
int i;
int *psindex,
paging_segment_t use_ps)
{
- int byte_num;
+ unsigned int byte_num;
int bit_num = 0;
paging_segment_t ps;
vm_offset_t cluster;
ps = use_ps;
PSL_LOCK();
PS_LOCK(ps);
+
+ ASSERT(ps->ps_clcount != 0);
+
ps->ps_clcount--;
dp_pages_free -= 1 << ps->ps_clshift;
if(min_pages_trigger_port &&
} else if ((ps = ps_select_segment(vs->vs_clshift, psindex)) ==
PAGING_SEGMENT_NULL) {
-#if 0
- bs_no_paging_space(TRUE);
-#endif
-#if 0
- if (verbose)
-#endif
- dprintf(("no space in available paging segments; "
- "swapon suggested\n"));
+ static uint32_t lastnotify = 0;
+ uint32_t now, nanoseconds_dummy;
+
+ /*
+ * Emit a notification of the low-paging resource condition
+ * but don't issue it more than once every five seconds. This
+ * prevents us from overflowing logs with thousands of
+ * repetitions of the message.
+ */
+ clock_get_system_nanotime(&now, &nanoseconds_dummy);
+ if (now > lastnotify + 5) {
+ dprintf(("no space in available paging segments\n"));
+ lastnotify = now;
+ }
+
/* the count got off maybe, reset to zero */
PSL_LOCK();
dp_pages_free = 0;
}
return (vm_offset_t) -1;
}
- ASSERT(ps->ps_clcount != 0);
/*
* Look for an available cluster. At the end of the loop,
paging_segment_t ps,
vm_offset_t cluster)
{
- ipc_port_t trigger = IP_NULL;
if (cluster >= (vm_offset_t) ps->ps_ncls)
panic("ps_deallocate_cluster: Invalid cluster number");
clrbit(ps->ps_bmap, cluster);
++ps->ps_clcount;
dp_pages_free += 1 << ps->ps_clshift;
- if(max_pages_trigger_port
- && (backing_store_release_trigger_disable == 0)
- && (dp_pages_free > maximum_pages_free)) {
- trigger = max_pages_trigger_port;
- max_pages_trigger_port = NULL;
- }
PSL_UNLOCK();
/*
ps_select_array[ps->ps_bs->bs_priority] = 0;
PSL_UNLOCK();
- if (trigger != IP_NULL) {
- VSL_LOCK();
- if(backing_store_release_trigger_disable != 0) {
- assert_wait((event_t)
- &backing_store_release_trigger_disable,
- THREAD_UNINT);
- VSL_UNLOCK();
- thread_block(THREAD_CONTINUE_NULL);
- } else {
- VSL_UNLOCK();
- }
- default_pager_space_alert(trigger, LO_WAT_ALERT);
- ipc_port_release_send(trigger);
- }
-
return;
}
struct vs_map *vsmap,
vm_size_t size)
{
- int i;
+ unsigned int i;
for (i = 0; i < size; i++)
if (!VSM_ISCLR(vsmap[i]) && !VSM_ISERR(vsmap[i]))
ps_deallocate_cluster(VSM_PS(vsmap[i]),
ps_vstruct_dealloc(
vstruct_t vs)
{
- int i;
- spl_t s;
+ unsigned int i;
+// spl_t s;
VS_MAP_LOCK(vs);
for (i = 0; i < INDIRECT_CLMAP_ENTRIES(vs->vs_size); i++) {
if (vs->vs_imap[i] != NULL) {
ps_dealloc_vsmap(vs->vs_imap[i], CLMAP_ENTRIES);
- kfree((vm_offset_t)vs->vs_imap[i],
- CLMAP_THRESHOLD);
+ kfree(vs->vs_imap[i], CLMAP_THRESHOLD);
}
}
- kfree((vm_offset_t)vs->vs_imap,
- INDIRECT_CLMAP_SIZE(vs->vs_size));
+ kfree(vs->vs_imap, INDIRECT_CLMAP_SIZE(vs->vs_size));
} else {
/*
* Direct map. Free used clusters, then memory.
*/
ps_dealloc_vsmap(vs->vs_dmap, vs->vs_size);
- kfree((vm_offset_t)vs->vs_dmap, CLMAP_SIZE(vs->vs_size));
+ kfree(vs->vs_dmap, CLMAP_SIZE(vs->vs_size));
}
VS_MAP_UNLOCK(vs);
bs_commit(- vs->vs_size);
- zfree(vstruct_zone, (vm_offset_t)vs);
+ zfree(vstruct_zone, vs);
}
-int ps_map_extend(vstruct_t, int); /* forward */
+int ps_map_extend(vstruct_t, unsigned int); /* forward */
int ps_map_extend(
vstruct_t vs,
- int new_size)
+ unsigned int new_size)
{
struct vs_map **new_imap;
struct vs_map *new_dmap = NULL;
/* Allocate an indirect page */
if ((new_imap[0] = (struct vs_map *)
kalloc(CLMAP_THRESHOLD)) == NULL) {
- kfree((vm_offset_t)new_imap, new_map_size);
+ kfree(new_imap, new_map_size);
return -1;
}
new_dmap = new_imap[0];
bs_commit(new_size - vs->vs_size);
vs->vs_size = new_size;
if (old_map)
- kfree((vm_offset_t)old_map, old_map_size);
+ kfree(old_map, old_map_size);
return 0;
}
vm_offset_t cluster; /* The cluster of offset. */
vm_offset_t newcl; /* The new cluster allocated. */
vm_offset_t newoff;
- int i;
+ unsigned int i;
struct vs_map *vsmap;
VS_MAP_LOCK(vs);
ASSERT(vs->vs_dmap);
- cluster = atop(offset) >> vs->vs_clshift;
+ cluster = atop_32(offset) >> vs->vs_clshift;
/*
* Initialize cluster error value
*/
newcl = ps_allocate_cluster(vs, &psindex,
PAGING_SEGMENT_NULL);
- if (newcl == -1) {
+ if (newcl == (vm_offset_t) -1) {
VS_MAP_UNLOCK(vs);
return (vm_offset_t) -1;
}
* relatively quick.
*/
ASSERT(trunc_page(offset) == offset);
- newcl = ptoa(newcl) << vs->vs_clshift;
+ newcl = ptoa_32(newcl) << vs->vs_clshift;
newoff = offset & ((1<<(vm_page_shift + vs->vs_clshift)) - 1);
if (flag == CL_ALLOC) {
/*
* set bits in the allocation bitmap according to which
* pages were requested. size is in bytes.
*/
- i = atop(newoff);
+ i = atop_32(newoff);
while ((size > 0) && (i < VSCLSIZE(vs))) {
VSM_SETALLOC(*vsmap, i);
i++;
* Offset is not cluster aligned, so number of pages
* and bitmaps must be adjusted
*/
- clmap->cl_numpages -= atop(newoff);
+ clmap->cl_numpages -= atop_32(newoff);
CLMAP_SHIFT(clmap, vs);
CLMAP_SHIFTALLOC(clmap, vs);
}
} else {
BS_STAT(clmap->cl_ps->ps_bs,
clmap->cl_ps->ps_bs->bs_pages_out_fail +=
- atop(size));
+ atop_32(size));
off = VSM_CLOFF(*vsmap);
VSM_SETERR(*vsmap, error);
}
} else
VS_MAP_UNLOCK(vs);
- DEBUG(DEBUG_VS_INTERNAL,
- ("returning 0x%X,vs=0x%X,vsmap=0x%X,flag=%d\n",
- newcl+newoff, (int) vs, (int) vsmap, flag));
- DEBUG(DEBUG_VS_INTERNAL,
- (" clmap->cl_ps=0x%X,cl_numpages=%d,clbmap=0x%x,cl_alloc=%x\n",
- (int) clmap->cl_ps, clmap->cl_numpages,
- (int) clmap->cl_bmap.clb_map, (int) clmap->cl_alloc.clb_map));
+ DP_DEBUG(DEBUG_VS_INTERNAL,
+ ("returning 0x%X,vs=0x%X,vsmap=0x%X,flag=%d\n",
+ newcl+newoff, (int) vs, (int) vsmap, flag));
+ DP_DEBUG(DEBUG_VS_INTERNAL,
+ (" clmap->cl_ps=0x%X,cl_numpages=%d,clbmap=0x%x,cl_alloc=%x\n",
+ (int) clmap->cl_ps, clmap->cl_numpages,
+ (int) clmap->cl_bmap.clb_map, (int) clmap->cl_alloc.clb_map));
return (newcl + newoff);
}
*/
while (length > 0) {
vm_offset_t newoff;
- int i;
+ unsigned int i;
- cluster = atop(offset) >> vs->vs_clshift;
+ cluster = atop_32(offset) >> vs->vs_clshift;
if (vs->vs_indirect) /* indirect map */
vsmap = vs->vs_imap[cluster/CLMAP_ENTRIES];
else
* paging segment cluster pages.
* Optimize for entire cluster cleraing.
*/
- if (newoff = (offset&((1<<(vm_page_shift+vs->vs_clshift))-1))) {
+ if ( (newoff = (offset&((1<<(vm_page_shift+vs->vs_clshift))-1))) ) {
/*
* Not cluster aligned.
*/
ASSERT(trunc_page(newoff) == newoff);
- i = atop(newoff);
+ i = atop_32(newoff);
} else
i = 0;
while ((i < VSCLSIZE(vs)) && (length > 0)) {
void
vs_cl_write_complete(
- vstruct_t vs,
- paging_segment_t ps,
- vm_offset_t offset,
- vm_offset_t addr,
- vm_size_t size,
- boolean_t async,
- int error)
+ vstruct_t vs,
+ __unused paging_segment_t ps,
+ vm_offset_t offset,
+ __unused vm_offset_t addr,
+ vm_size_t size,
+ boolean_t async,
+ int error)
{
- kern_return_t kr;
+// kern_return_t kr;
if (error) {
/*
dprintf(("write failed error = 0x%x\n", error));
/* add upl_abort code here */
} else
- GSTAT(global_stats.gs_pages_out += atop(size));
+ GSTAT(global_stats.gs_pages_out += atop_32(size));
/*
* Notify the vstruct mapping code, so it can do its accounting.
*/
if(vsa->vsa_error) {
/* need to consider error condition. re-write data or */
/* throw it away here. */
- vm_offset_t ioaddr;
- if(vm_map_copyout(kernel_map, &ioaddr,
- (vm_map_copy_t)vsa->vsa_addr) != KERN_SUCCESS)
- panic("vs_cluster_write: unable to copy source list\n");
- vm_deallocate(kernel_map, ioaddr, vsa->vsa_size);
+ vm_map_copy_discard((vm_map_copy_t)vsa->vsa_addr);
}
ps_vs_write_complete(vsa->vsa_vs, vsa->vsa_offset,
vsa->vsa_size, vsa->vsa_error);
return KERN_SUCCESS;
}
-kern_return_t ps_read_device(paging_segment_t, vm_offset_t, vm_offset_t *, unsigned int, unsigned int *, int); /* forward */
-
kern_return_t
ps_read_device(
paging_segment_t ps,
default_pager_thread_t *dpt = NULL;
device = dev_port_lookup(ps->ps_device);
- clustered_reads[atop(size)]++;
+ clustered_reads[atop_32(size)]++;
dev_offset = (ps->ps_offset +
(offset >> (vm_page_shift - ps->ps_record_shift)));
vsa->vsa_size = 0;
vsa->vsa_ps = NULL;
}
- mutex_init(&vsa->vsa_lock, ETAP_DPAGE_VSSEQNO);
+ mutex_init(&vsa->vsa_lock, 0);
ip_lock(vsa->reply_port);
vsa->reply_port->ip_sorights++;
ip_reference(vsa->reply_port);
records_read = (bytes_read >>
(vm_page_shift - ps->ps_record_shift));
dev_offset += records_read;
- DEBUG(DEBUG_VS_INTERNAL,
- ("calling vm_deallocate(addr=0x%X,size=0x%X)\n",
- dev_buffer, bytes_read));
+ DP_DEBUG(DEBUG_VS_INTERNAL,
+ ("calling vm_deallocate(addr=0x%X,size=0x%X)\n",
+ dev_buffer, bytes_read));
if (vm_deallocate(kernel_map, dev_buffer, bytes_read)
!= KERN_SUCCESS)
Panic("dealloc buf");
*residualp = size - total_read;
if((dev_buffer != *bufferp) && (total_read != 0)) {
vm_offset_t temp_buffer;
- vm_allocate(kernel_map, &temp_buffer, total_read, TRUE);
+ vm_allocate(kernel_map, &temp_buffer, total_read, VM_FLAGS_ANYWHERE);
memcpy((void *) temp_buffer, (void *) *bufferp, total_read);
if(vm_map_copyin_page_list(kernel_map, temp_buffer, total_read,
VM_MAP_COPYIN_OPT_SRC_DESTROY |
return KERN_SUCCESS;
}
-kern_return_t ps_write_device(paging_segment_t, vm_offset_t, vm_offset_t, unsigned int, struct vs_async *); /* forward */
-
kern_return_t
ps_write_device(
paging_segment_t ps,
- clustered_writes[atop(size)]++;
+ clustered_writes[atop_32(size)]++;
dev_offset = (ps->ps_offset +
(offset >> (vm_page_shift - ps->ps_record_shift)));
"device_write_request returned ",
kr, addr, size, offset));
BS_STAT(ps->ps_bs,
- ps->ps_bs->bs_pages_out_fail += atop(size));
+ ps->ps_bs->bs_pages_out_fail += atop_32(size));
/* do the completion notification to free resources */
device_write_reply(reply_port, kr, 0);
return PAGER_ERROR;
"device_write returned ",
kr, addr, size, offset));
BS_STAT(ps->ps_bs,
- ps->ps_bs->bs_pages_out_fail += atop(size));
+ ps->ps_bs->bs_pages_out_fail += atop_32(size));
return PAGER_ERROR;
}
if (bytes_written & ((vm_page_size >> ps->ps_record_shift) - 1))
kern_return_t
ps_read_device(
- paging_segment_t ps,
- vm_offset_t offset,
- vm_offset_t *bufferp,
- unsigned int size,
- unsigned int *residualp,
- int flags)
+ __unused paging_segment_t ps,
+ __unused vm_offset_t offset,
+ __unused vm_offset_t *bufferp,
+ __unused unsigned int size,
+ __unused unsigned int *residualp,
+ __unused int flags)
{
panic("ps_read_device not supported");
}
+kern_return_t
ps_write_device(
- paging_segment_t ps,
- vm_offset_t offset,
- vm_offset_t addr,
- unsigned int size,
- struct vs_async *vsa)
+ __unused paging_segment_t ps,
+ __unused vm_offset_t offset,
+ __unused vm_offset_t addr,
+ __unused unsigned int size,
+ __unused struct vs_async *vsa)
{
panic("ps_write_device not supported");
}
#endif /* DEVICE_PAGING */
-void pvs_object_data_provided(vstruct_t, upl_t, vm_offset_t, vm_size_t); /* forward */
+void pvs_object_data_provided(vstruct_t, upl_t, upl_offset_t, upl_size_t); /* forward */
void
pvs_object_data_provided(
- vstruct_t vs,
- upl_t upl,
- vm_offset_t offset,
- vm_size_t size)
+ __unused vstruct_t vs,
+ __unused upl_t upl,
+ __unused upl_offset_t offset,
+ upl_size_t size)
{
- DEBUG(DEBUG_VS_INTERNAL,
- ("buffer=0x%x,offset=0x%x,size=0x%x\n",
- upl, offset, size));
+ DP_DEBUG(DEBUG_VS_INTERNAL,
+ ("buffer=0x%x,offset=0x%x,size=0x%x\n",
+ upl, offset, size));
ASSERT(size > 0);
- GSTAT(global_stats.gs_pages_in += atop(size));
+ GSTAT(global_stats.gs_pages_in += atop_32(size));
#if USE_PRECIOUS
{
upl_t upl;
kern_return_t error = KERN_SUCCESS;
- int size;
- unsigned int residual;
+ int size;
+ int residual;
unsigned int request_flags;
- int seg_index;
- int pages_in_cl;
+ int seg_index;
+ int pages_in_cl;
int cl_size;
int cl_mask;
- int cl_index;
- int xfer_size;
+ int cl_index;
+ int xfer_size;
vm_offset_t ps_offset[(VM_SUPER_CLUSTER / PAGE_SIZE) >> VSTRUCT_DEF_CLSHIFT];
paging_segment_t psp[(VM_SUPER_CLUSTER / PAGE_SIZE) >> VSTRUCT_DEF_CLSHIFT];
struct clmap clmap;
#else
request_flags = UPL_NO_SYNC | UPL_CLEAN_IN_PLACE | UPL_RET_ONLY_ABSENT;
#endif
+
+ assert(dp_encryption_inited);
+ if (dp_encryption) {
+ /*
+ * ENCRYPTED SWAP:
+ * request that the UPL be prepared for
+ * decryption.
+ */
+ request_flags |= UPL_ENCRYPT;
+ }
+
while (cnt && (error == KERN_SUCCESS)) {
int ps_info_valid;
int page_list_count;
/*
* Let VM system know about holes in clusters.
*/
- GSTAT(global_stats.gs_pages_unavail += atop(abort_size));
+ GSTAT(global_stats.gs_pages_unavail += atop_32(abort_size));
page_list_count = 0;
memory_object_super_upl_request(
while (cl_index < pages_in_cl
&& xfer_size < size) {
/*
- * accumulate allocated pages within
+ * accumulate allocated pages within
* a physical segment
*/
if (CLMAP_ISSET(clmap, cl_index)) {
if (cl_index < pages_in_cl
|| xfer_size >= size) {
/*
- * we've hit an unallocated page or
+ * we've hit an unallocated page or
* the end of this request... go fire
* the I/O
*/
}
/*
* we've hit the end of the current physical
- * segment and there's more to do, so try
+ * segment and there's more to do, so try
* moving to the next one
*/
seg_index++;
ps_offset[seg_index] =
- ps_clmap(vs,
- cur_offset & ~cl_mask,
+ ps_clmap(vs,
+ cur_offset & ~cl_mask,
&clmap, CL_FIND, 0, 0);
psp[seg_index] = CLMAP_PS(clmap);
ps_info_valid = 1;
if ((ps_offset[seg_index - 1] != (ps_offset[seg_index] - cl_size)) || (psp[seg_index - 1] != psp[seg_index])) {
/*
- * if the physical segment we're about
- * to step into is not contiguous to
- * the one we're currently in, or it's
+ * if the physical segment we're about
+ * to step into is not contiguous to
+ * the one we're currently in, or it's
* in a different paging file, or
* it hasn't been allocated....
* we stop here and generate the I/O
}
/*
* start with first page of the next physical
- * segment
+ * segment
*/
cl_index = 0;
}
&upl, NULL, &page_list_count,
request_flags | UPL_SET_INTERNAL);
- error = ps_read_file(psp[beg_pseg],
- upl, (vm_offset_t) 0,
- ps_offset[beg_pseg] +
- (beg_indx * vm_page_size),
+ error = ps_read_file(psp[beg_pseg],
+ upl, (upl_offset_t) 0,
+ ps_offset[beg_pseg] +
+ (beg_indx * vm_page_size),
xfer_size, &residual, 0);
} else
continue;
failed_size = 0;
/*
- * Adjust counts and send response to VM. Optimize
+ * Adjust counts and send response to VM. Optimize
* for the common case, i.e. no error and/or partial
- * data. If there was an error, then we need to error
+ * data. If there was an error, then we need to error
* the entire range, even if some data was successfully
- * read. If there was a partial read we may supply some
+ * read. If there was a partial read we may supply some
* data and may error some as well. In all cases the
- * VM must receive some notification for every page in the
- * range.
+ * VM must receive some notification for every page
+ * in the range.
*/
if ((error == KERN_SUCCESS) && (residual == 0)) {
/*
* Got everything we asked for, supply the data
- * to the VM. Note that as a side effect of
- * supplying * the data, the buffer holding the
- * supplied data is * deallocated from the pager's
- * address space.
+ * to the VM. Note that as a side effect of
+ * supplying the data, the buffer holding the
+ * supplied data is deallocated from the pager's
+ * address space.
*/
pvs_object_data_provided(
vs, upl, vs_offset, xfer_size);
fill = residual
& ~vm_page_size;
- lsize = (xfer_size - residual)
+ lsize = (xfer_size - residual)
+ fill;
pvs_object_data_provided(
- vs, upl,
+ vs, upl,
vs_offset, lsize);
if (lsize < xfer_size) {
/*
* If there was an error in any part of the range, tell
* the VM. Note that error is explicitly checked again
- * since it can be modified above.
+ * since it can be modified above.
*/
if (error != KERN_SUCCESS) {
BS_STAT(psp[beg_pseg]->ps_bs,
psp[beg_pseg]->ps_bs->bs_pages_in_fail
- += atop(failed_size));
+ += atop_32(failed_size));
}
size -= xfer_size;
vs_offset += xfer_size;
vs_cluster_write(
vstruct_t vs,
upl_t internal_upl,
- vm_offset_t offset,
- vm_size_t cnt,
+ upl_offset_t offset,
+ upl_size_t cnt,
boolean_t dp_internal,
int flags)
{
- vm_offset_t size;
- vm_offset_t transfer_size;
+ upl_size_t transfer_size;
int error = 0;
struct clmap clmap;
vm_offset_t actual_offset; /* Offset within paging segment */
paging_segment_t ps;
- vm_offset_t subx_size;
vm_offset_t mobj_base_addr;
vm_offset_t mobj_target_addr;
- int mobj_size;
-
- struct vs_async *vsa;
- vm_map_copy_t copy;
upl_t upl;
upl_page_info_t *pl;
int page_index;
int list_size;
- int cl_size;
+ int pages_in_cl;
+ unsigned int cl_size;
+ int base_index;
+ unsigned int seg_size;
+
+ pages_in_cl = 1 << vs->vs_clshift;
+ cl_size = pages_in_cl * vm_page_size;
if (!dp_internal) {
int page_list_count;
int request_flags;
- int super_size;
+ unsigned int super_size;
int first_dirty;
int num_dirty;
int num_of_pages;
int seg_index;
- int pages_in_cl;
- int must_abort;
- vm_offset_t upl_offset;
+ upl_offset_t upl_offset;
vm_offset_t seg_offset;
- vm_offset_t ps_offset[(VM_SUPER_CLUSTER / PAGE_SIZE) >> VSTRUCT_DEF_CLSHIFT];
- paging_segment_t psp[(VM_SUPER_CLUSTER / PAGE_SIZE) >> VSTRUCT_DEF_CLSHIFT];
+ vm_offset_t ps_offset[((VM_SUPER_CLUSTER / PAGE_SIZE) >> VSTRUCT_DEF_CLSHIFT) + 1];
+ paging_segment_t psp[((VM_SUPER_CLUSTER / PAGE_SIZE) >> VSTRUCT_DEF_CLSHIFT) + 1];
- pages_in_cl = 1 << vs->vs_clshift;
- cl_size = pages_in_cl * vm_page_size;
-
if (bs_low) {
super_size = cl_size;
UPL_NO_SYNC | UPL_SET_INTERNAL;
}
+ if (!dp_encryption_inited) {
+ /*
+ * ENCRYPTED SWAP:
+ * Once we've started using swap, we
+ * can't change our mind on whether
+ * it needs to be encrypted or
+ * not.
+ */
+ dp_encryption_inited = TRUE;
+ }
+ if (dp_encryption) {
+ /*
+ * ENCRYPTED SWAP:
+ * request that the UPL be prepared for
+ * encryption.
+ */
+ request_flags |= UPL_ENCRYPT;
+ flags |= UPL_PAGING_ENCRYPTED;
+ }
+
page_list_count = 0;
memory_object_super_upl_request(vs->vs_control,
(memory_object_offset_t)offset,
cnt, super_size,
&upl, NULL, &page_list_count,
- request_flags | UPL_PAGEOUT);
+ request_flags | UPL_FOR_PAGEOUT);
pl = UPL_GET_INTERNAL_PAGE_LIST(upl);
+ seg_size = cl_size - (upl->offset % cl_size);
+ upl_offset = upl->offset & ~(cl_size - 1);
+
for (seg_index = 0, transfer_size = upl->size;
transfer_size > 0; ) {
-
ps_offset[seg_index] =
- ps_clmap(vs, upl->offset + (seg_index * cl_size),
- &clmap, CL_ALLOC,
- transfer_size < cl_size ?
- transfer_size : cl_size, 0);
+ ps_clmap(vs,
+ upl_offset,
+ &clmap, CL_ALLOC,
+ cl_size, 0);
if (ps_offset[seg_index] == (vm_offset_t) -1) {
upl_abort(upl, 0);
}
psp[seg_index] = CLMAP_PS(clmap);
- if (transfer_size > cl_size) {
- transfer_size -= cl_size;
+ if (transfer_size > seg_size) {
+ transfer_size -= seg_size;
+ upl_offset += cl_size;
+ seg_size = cl_size;
seg_index++;
} else
transfer_size = 0;
}
- for (page_index = 0,
- num_of_pages = upl->size / vm_page_size;
- page_index < num_of_pages; ) {
+ /*
+ * Ignore any non-present pages at the end of the
+ * UPL.
+ */
+ for (page_index = upl->size / vm_page_size; page_index > 0;)
+ if (UPL_PAGE_PRESENT(pl, --page_index))
+ break;
+ num_of_pages = page_index + 1;
+
+ base_index = (upl->offset % cl_size) / PAGE_SIZE;
+
+ for (page_index = 0; page_index < num_of_pages; ) {
/*
* skip over non-dirty pages
*/
for ( ; page_index < num_of_pages; page_index++) {
- if (UPL_DIRTY_PAGE(pl, page_index)
+ if (UPL_DIRTY_PAGE(pl, page_index)
|| UPL_PRECIOUS_PAGE(pl, page_index))
/*
* this is a page we need to write
- * go see if we can buddy it up with
+ * go see if we can buddy it up with
* others that are contiguous to it
*/
break;
/*
* if the page is not-dirty, but present we
- * need to commit it... This is an unusual
+ * need to commit it... This is an unusual
* case since we only asked for dirty pages
*/
if (UPL_PAGE_PRESENT(pl, page_index)) {
pl,
page_list_count,
&empty);
- if (empty)
+ if (empty) {
+ assert(page_index ==
+ num_of_pages - 1);
upl_deallocate(upl);
+ }
}
}
if (page_index == num_of_pages)
break;
/*
- * gather up contiguous dirty pages... we have at
- * least 1 otherwise we would have bailed above
+ * gather up contiguous dirty pages... we have at
+ * least 1 * otherwise we would have bailed above
* make sure that each physical segment that we step
* into is contiguous to the one we're currently in
* if it's not, we have to stop and write what we have
*/
- for (first_dirty = page_index;
+ for (first_dirty = page_index;
page_index < num_of_pages; ) {
- if ( !UPL_DIRTY_PAGE(pl, page_index)
+ if ( !UPL_DIRTY_PAGE(pl, page_index)
&& !UPL_PRECIOUS_PAGE(pl, page_index))
break;
page_index++;
int cur_seg;
int nxt_seg;
- cur_seg =
- (page_index - 1) / pages_in_cl;
- nxt_seg = page_index / pages_in_cl;
+ cur_seg = (base_index + (page_index - 1))/pages_in_cl;
+ nxt_seg = (base_index + page_index)/pages_in_cl;
if (cur_seg != nxt_seg) {
if ((ps_offset[cur_seg] != (ps_offset[nxt_seg] - cl_size)) || (psp[cur_seg] != psp[nxt_seg]))
- /*
- * if the segment we're about
- * to step into is not
- * contiguous to the one we're
- * currently in, or it's in a
+ /*
+ * if the segment we're about
+ * to step into is not
+ * contiguous to the one we're
+ * currently in, or it's in a
* different paging file....
- * we stop here and generate
+ * we stop here and generate
* the I/O
*/
break;
}
}
num_dirty = page_index - first_dirty;
- must_abort = 1;
if (num_dirty) {
upl_offset = first_dirty * vm_page_size;
- seg_index = first_dirty / pages_in_cl;
- seg_offset = upl_offset - (seg_index * cl_size);
transfer_size = num_dirty * vm_page_size;
-
while (transfer_size) {
- int seg_size;
if ((seg_size = cl_size -
- (upl_offset % cl_size))
+ ((upl->offset + upl_offset) % cl_size))
> transfer_size)
seg_size = transfer_size;
}
upl_offset = first_dirty * vm_page_size;
transfer_size = num_dirty * vm_page_size;
+
+ seg_index = (base_index + first_dirty) / pages_in_cl;
+ seg_offset = (upl->offset + upl_offset) % cl_size;
+
error = ps_write_file(psp[seg_index],
upl, upl_offset,
ps_offset[seg_index]
+ seg_offset,
transfer_size, flags);
- must_abort = 0;
- }
- if (must_abort) {
+ } else {
boolean_t empty = FALSE;
upl_abort_range(upl,
first_dirty * vm_page_size,
num_dirty * vm_page_size,
UPL_ABORT_NOTIFY_EMPTY,
&empty);
- if (empty)
+ if (empty) {
+ assert(page_index == num_of_pages);
upl_deallocate(upl);
+ }
}
}
cnt, flags);
if (error)
break;
- }
+ }
if (error)
break;
actual_offset += cnt;
{
int num_pages;
struct vs_map *vsmap;
- int i, j, k;
+ unsigned int i, j, k;
num_pages = 0;
if (vs->vs_indirect) {
}
}
- return ptoa(num_pages);
+ return ptoa_32(num_pages);
}
size_t
default_pager_page_t *pages,
size_t pages_size)
{
- int num_pages;
+ unsigned int num_pages;
struct vs_map *vsmap;
vm_offset_t offset;
- int i, j, k;
+ unsigned int i, j, k;
num_pages = 0;
offset = 0;
upl_t upl)
{
struct vs_map *vsmap;
- struct vs_map old_vsmap;
- struct vs_map new_vsmap;
- int i, j, k;
+// struct vs_map old_vsmap;
+// struct vs_map new_vsmap;
+ unsigned int i, j;
VS_LOCK(vs); /* block all work on this vstruct */
/* can't allow the normal multiple write */
VS_UNLOCK(vs);
vs_changed:
if (vs->vs_indirect) {
- int vsmap_size;
- int clmap_off;
+ unsigned int vsmap_size;
+ int clmap_off;
/* loop on indirect maps */
for (i = 0; i < INDIRECT_CLMAP_ENTRIES(vs->vs_size); i++) {
vsmap = vs->vs_imap[i];
struct vs_map *vsmap;
vm_offset_t cluster;
- cluster = atop(offset) >> vs->vs_clshift;
+ cluster = atop_32(offset) >> vs->vs_clshift;
if (vs->vs_indirect) {
long ind_block = cluster/CLMAP_ENTRIES;
paging_segment_t ps;
struct clmap clmap;
kern_return_t error = KERN_SUCCESS;
- int size, size_wanted, i;
+ unsigned int size, size_wanted;
+ int i;
unsigned int residual;
- int unavail_size;
- default_pager_thread_t *dpt;
- boolean_t dealloc;
- struct vs_map *vsmap_ptr;
+ unsigned int unavail_size;
+// default_pager_thread_t *dpt;
+// boolean_t dealloc;
+ struct vs_map *vsmap_ptr = NULL;
struct vs_map read_vsmap;
struct vs_map original_read_vsmap;
struct vs_map write_vsmap;
- upl_t sync_upl;
- vm_offset_t ioaddr;
+// upl_t sync_upl;
+// vm_offset_t ioaddr;
/* vs_cluster_transfer reads in the pages of a cluster and
* then writes these pages back to new backing store. The
*/
} else {
/* NEED TO ISSUE WITH SYNC & NO COMMIT */
- error = ps_read_file(ps, upl, (vm_offset_t) 0, actual_offset,
+ error = ps_read_file(ps, upl, (upl_offset_t) 0, actual_offset,
size, &residual,
(UPL_IOSYNC | UPL_NOCOMMIT));
}
*
*/
if ((error == KERN_SUCCESS) && (residual == 0)) {
- int page_list_count = 0;
/*
* Got everything we asked for, supply the data to
}
kern_return_t
-default_pager_add_file(MACH_PORT_FACE backing_store,
- int *vp,
+default_pager_add_file(
+ MACH_PORT_FACE backing_store,
+ vnode_ptr_t vp,
int record_size,
- long size)
+ vm_size_t size)
{
backing_store_t bs;
paging_segment_t ps;
int i;
+ unsigned int j;
int error;
if ((bs = backing_store_lookup(backing_store))
PS_LOCK_INIT(ps);
ps->ps_bmap = (unsigned char *) kalloc(RMAPSIZE(ps->ps_ncls));
if (!ps->ps_bmap) {
- kfree((vm_offset_t)ps, sizeof *ps);
+ kfree(ps, sizeof *ps);
BS_UNLOCK(bs);
return KERN_RESOURCE_SHORTAGE;
}
- for (i = 0; i < ps->ps_ncls; i++) {
- clrbit(ps->ps_bmap, i);
+ for (j = 0; j < ps->ps_ncls; j++) {
+ clrbit(ps->ps_bmap, j);
}
ps->ps_going_away = FALSE;
ps->ps_bs = bs;
if ((error = ps_enter(ps)) != 0) {
- kfree((vm_offset_t)ps->ps_bmap, RMAPSIZE(ps->ps_ncls));
- kfree((vm_offset_t)ps, sizeof *ps);
+ kfree(ps->ps_bmap, RMAPSIZE(ps->ps_ncls));
+ kfree(ps, sizeof *ps);
BS_UNLOCK(bs);
return KERN_RESOURCE_SHORTAGE;
}
bs_more_space(ps->ps_clcount);
- DEBUG(DEBUG_BS_INTERNAL,
- ("device=0x%x,offset=0x%x,count=0x%x,record_size=0x%x,shift=%d,total_size=0x%x\n",
- device, offset, size, record_size,
- ps->ps_record_shift, ps->ps_pgnum));
+ DP_DEBUG(DEBUG_BS_INTERNAL,
+ ("device=0x%x,offset=0x%x,count=0x%x,record_size=0x%x,shift=%d,total_size=0x%x\n",
+ device, offset, size, record_size,
+ ps->ps_record_shift, ps->ps_pgnum));
return KERN_SUCCESS;
}
ps_read_file(
paging_segment_t ps,
upl_t upl,
- vm_offset_t upl_offset,
+ upl_offset_t upl_offset,
vm_offset_t offset,
- unsigned int size,
+ upl_size_t size,
unsigned int *residualp,
int flags)
{
int error = 0;
int result;
+ assert(dp_encryption_inited);
- clustered_reads[atop(size)]++;
+ clustered_reads[atop_32(size)]++;
f_offset = (vm_object_offset_t)(ps->ps_offset + offset);
ps_write_file(
paging_segment_t ps,
upl_t upl,
- vm_offset_t upl_offset,
+ upl_offset_t upl_offset,
vm_offset_t offset,
unsigned int size,
int flags)
vm_object_offset_t f_offset;
kern_return_t result;
- int error = 0;
+ assert(dp_encryption_inited);
- clustered_writes[atop(size)]++;
+ clustered_writes[atop_32(size)]++;
f_offset = (vm_object_offset_t)(ps->ps_offset + offset);
+ if (flags & UPL_PAGING_ENCRYPTED) {
+ /*
+ * ENCRYPTED SWAP:
+ * encrypt all the pages that we're going
+ * to pageout.
+ */
+ upl_encrypt(upl, upl_offset, size);
+ }
+
if (vnode_pageout(ps->ps_vnode,
upl, upl_offset, f_offset, (vm_size_t)size, flags, NULL))
result = KERN_FAILURE;
}
kern_return_t
-default_pager_triggers(MACH_PORT_FACE default_pager,
+default_pager_triggers( __unused MACH_PORT_FACE default_pager,
int hi_wat,
int lo_wat,
int flags,
kern_return_t kr;
PSL_LOCK();
- if (flags == HI_WAT_ALERT) {
+ if (flags == SWAP_ENCRYPT_ON) {
+ /* ENCRYPTED SWAP: turn encryption on */
+ release = trigger_port;
+ if (!dp_encryption_inited) {
+ dp_encryption_inited = TRUE;
+ dp_encryption = TRUE;
+ kr = KERN_SUCCESS;
+ } else {
+ kr = KERN_FAILURE;
+ }
+ } else if (flags == SWAP_ENCRYPT_OFF) {
+ /* ENCRYPTED SWAP: turn encryption off */
+ release = trigger_port;
+ if (!dp_encryption_inited) {
+ dp_encryption_inited = TRUE;
+ dp_encryption = FALSE;
+ kr = KERN_SUCCESS;
+ } else {
+ kr = KERN_FAILURE;
+ }
+ } else if (flags == HI_WAT_ALERT) {
release = min_pages_trigger_port;
min_pages_trigger_port = trigger_port;
minimum_pages_remaining = hi_wat/vm_page_size;
return kr;
}
+
+/*
+ * Monitor the amount of available backing store vs. the amount of
+ * required backing store, notify a listener (if present) when
+ * backing store may safely be removed.
+ *
+ * We attempt to avoid the situation where backing store is
+ * discarded en masse, as this can lead to thrashing as the
+ * backing store is compacted.
+ */
+
+#define PF_INTERVAL 3 /* time between free level checks */
+#define PF_LATENCY 10 /* number of intervals before release */
+
+static int dp_pages_free_low_count = 0;
+thread_call_t default_pager_backing_store_monitor_callout;
+
+void
+default_pager_backing_store_monitor(__unused thread_call_param_t p1,
+ __unused thread_call_param_t p2)
+{
+// unsigned long long average;
+ ipc_port_t trigger;
+ uint64_t deadline;
+
+ /*
+ * We determine whether it will be safe to release some
+ * backing store by watching the free page level. If
+ * it remains below the maximum_pages_free threshold for
+ * at least PF_LATENCY checks (taken at PF_INTERVAL seconds)
+ * then we deem it safe.
+ *
+ * Note that this establishes a maximum rate at which backing
+ * store will be released, as each notification (currently)
+ * only results in a single backing store object being
+ * released.
+ */
+ if (dp_pages_free > maximum_pages_free) {
+ dp_pages_free_low_count++;
+ } else {
+ dp_pages_free_low_count = 0;
+ }
+
+ /* decide whether to send notification */
+ trigger = IP_NULL;
+ if (max_pages_trigger_port &&
+ (backing_store_release_trigger_disable == 0) &&
+ (dp_pages_free_low_count > PF_LATENCY)) {
+ trigger = max_pages_trigger_port;
+ max_pages_trigger_port = NULL;
+ }
+
+ /* send notification */
+ if (trigger != IP_NULL) {
+ VSL_LOCK();
+ if(backing_store_release_trigger_disable != 0) {
+ assert_wait((event_t)
+ &backing_store_release_trigger_disable,
+ THREAD_UNINT);
+ VSL_UNLOCK();
+ thread_block(THREAD_CONTINUE_NULL);
+ } else {
+ VSL_UNLOCK();
+ }
+ default_pager_space_alert(trigger, LO_WAT_ALERT);
+ ipc_port_release_send(trigger);
+ dp_pages_free_low_count = 0;
+ }
+
+ clock_interval_to_deadline(PF_INTERVAL, NSEC_PER_SEC, &deadline);
+ thread_call_enter_delayed(default_pager_backing_store_monitor_callout, deadline);
+}
projects / apple / xnu.git / blobdiff