sys/vm/vm_meter.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1982, 1986, 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/kernel.h>
  35 #include <sys/lock.h>
  36 #include <sys/malloc.h>
  37 #include <sys/mutex.h>
  38 #include <sys/proc.h>
  39 #include <sys/resource.h>
  40 #include <sys/rwlock.h>
  41 #include <sys/sx.h>
  42 #include <sys/vmmeter.h>
  43 #include <sys/smp.h>
  44
  45 #include <vm/vm.h>
  46 #include <vm/vm_page.h>
  47 #include <vm/vm_extern.h>
  48 #include <vm/vm_param.h>
  49 #include <vm/vm_phys.h>
  50 #include <vm/vm_pagequeue.h>
  51 #include <vm/pmap.h>
  52 #include <vm/vm_map.h>
  53 #include <vm/vm_object.h>
  54 #include <sys/sysctl.h>
  55
  56 struct vmmeter __read_mostly vm_cnt = {
  57         .v_swtch = EARLY_COUNTER,
  58         .v_trap = EARLY_COUNTER,
  59         .v_syscall = EARLY_COUNTER,
  60         .v_intr = EARLY_COUNTER,
  61         .v_soft = EARLY_COUNTER,
  62         .v_vm_faults = EARLY_COUNTER,
  63         .v_io_faults = EARLY_COUNTER,
  64         .v_cow_faults = EARLY_COUNTER,
  65         .v_cow_optim = EARLY_COUNTER,
  66         .v_zfod = EARLY_COUNTER,
  67         .v_ozfod = EARLY_COUNTER,
  68         .v_swapin = EARLY_COUNTER,
  69         .v_swapout = EARLY_COUNTER,
  70         .v_swappgsin = EARLY_COUNTER,
  71         .v_swappgsout = EARLY_COUNTER,
  72         .v_vnodein = EARLY_COUNTER,
  73         .v_vnodeout = EARLY_COUNTER,
  74         .v_vnodepgsin = EARLY_COUNTER,
  75         .v_vnodepgsout = EARLY_COUNTER,
  76         .v_intrans = EARLY_COUNTER,
  77         .v_reactivated = EARLY_COUNTER,
  78         .v_pdwakeups = EARLY_COUNTER,
  79         .v_pdpages = EARLY_COUNTER,
  80         .v_pdshortfalls = EARLY_COUNTER,
  81         .v_dfree = EARLY_COUNTER,
  82         .v_pfree = EARLY_COUNTER,
  83         .v_tfree = EARLY_COUNTER,
  84         .v_forks = EARLY_COUNTER,
  85         .v_vforks = EARLY_COUNTER,
  86         .v_rforks = EARLY_COUNTER,
  87         .v_kthreads = EARLY_COUNTER,
  88         .v_forkpages = EARLY_COUNTER,
  89         .v_vforkpages = EARLY_COUNTER,
  90         .v_rforkpages = EARLY_COUNTER,
  91         .v_kthreadpages = EARLY_COUNTER,
  92         .v_wire_count = EARLY_COUNTER,
  93 };
  94
  95 u_long __exclusive_cache_line vm_user_wire_count;
  96
  97 static void
  98 vmcounter_startup(void)
  99 {
 100         counter_u64_t *cnt = (counter_u64_t *)&vm_cnt;
 101
 102         COUNTER_ARRAY_ALLOC(cnt, VM_METER_NCOUNTERS, M_WAITOK);
 103 }
 104 SYSINIT(counter, SI_SUB_KMEM, SI_ORDER_FIRST, vmcounter_startup, NULL);
 105
 106 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
 107         CTLFLAG_RW, &vm_cnt.v_free_min, 0, "Minimum low-free-pages threshold");
 108 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
 109         CTLFLAG_RW, &vm_cnt.v_free_target, 0, "Desired free pages");
 110 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
 111         CTLFLAG_RW, &vm_cnt.v_free_reserved, 0, "Pages reserved for deadlock");
 112 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
 113         CTLFLAG_RW, &vm_cnt.v_inactive_target, 0, "Pages desired inactive");
 114 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
 115         CTLFLAG_RW, &vm_cnt.v_pageout_free_min, 0, "Min pages reserved for kernel");
 116 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
 117         CTLFLAG_RW, &vm_cnt.v_free_severe, 0, "Severe page depletion point");
 118
 119 static int
 120 sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS)
 121 {
 122
 123 #ifdef SCTL_MASK32
 124         uint32_t la[4];
 125
 126         if (req->flags & SCTL_MASK32) {
 127                 la[0] = averunnable.ldavg[0];
 128                 la[1] = averunnable.ldavg[1];
 129                 la[2] = averunnable.ldavg[2];
 130                 la[3] = averunnable.fscale;
 131                 return SYSCTL_OUT(req, la, sizeof(la));
 132         } else
 133 #endif
 134                 return SYSCTL_OUT(req, &averunnable, sizeof(averunnable));
 135 }
 136 SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD |
 137     CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg",
 138     "Machine loadaverage history");
 139
 140 #if defined(COMPAT_FREEBSD11)
 141 struct vmtotal11 {
 142         int16_t t_rq;
 143         int16_t t_dw;
 144         int16_t t_pw;
 145         int16_t t_sl;
 146         int16_t t_sw;
 147         int32_t t_vm;
 148         int32_t t_avm;
 149         int32_t t_rm;
 150         int32_t t_arm;
 151         int32_t t_vmshr;
 152         int32_t t_avmshr;
 153         int32_t t_rmshr;
 154         int32_t t_armshr;
 155         int32_t t_free;
 156 };
 157 #endif
 158
 159 static int
 160 vmtotal(SYSCTL_HANDLER_ARGS)
 161 {
 162         struct vmtotal total;
 163 #if defined(COMPAT_FREEBSD11)
 164         struct vmtotal11 total11;
 165 #endif
 166         vm_object_t object;
 167         struct proc *p;
 168         struct thread *td;
 169
 170         if (req->oldptr == NULL) {
 171 #if defined(COMPAT_FREEBSD11)
 172                 if (curproc->p_osrel < P_OSREL_VMTOTAL64)
 173                         return (SYSCTL_OUT(req, NULL, sizeof(total11)));
 174 #endif
 175                 return (SYSCTL_OUT(req, NULL, sizeof(total)));
 176         }
 177         bzero(&total, sizeof(total));
 178
 179         /*
 180          * Calculate process statistics.
 181          */
 182         sx_slock(&allproc_lock);
 183         FOREACH_PROC_IN_SYSTEM(p) {
 184                 if ((p->p_flag & P_SYSTEM) != 0)
 185                         continue;
 186                 PROC_LOCK(p);
 187                 if (p->p_state != PRS_NEW) {
 188                         FOREACH_THREAD_IN_PROC(p, td) {
 189                                 thread_lock(td);
 190                                 switch (TD_GET_STATE(td)) {
 191                                 case TDS_INHIBITED:
 192                                         if (TD_IS_SWAPPED(td))
 193                                                 total.t_sw++;
 194                                         else if (TD_IS_SLEEPING(td)) {
 195                                                 if (td->td_priority <= PZERO)
 196                                                         total.t_dw++;
 197                                                 else
 198                                                         total.t_sl++;
 199                                         }
 200                                         break;
 201                                 case TDS_CAN_RUN:
 202                                         total.t_sw++;
 203                                         break;
 204                                 case TDS_RUNQ:
 205                                 case TDS_RUNNING:
 206                                         total.t_rq++;
 207                                         break;
 208                                 default:
 209                                         break;
 210                                 }
 211                                 thread_unlock(td);
 212                         }
 213                 }
 214                 PROC_UNLOCK(p);
 215         }
 216         sx_sunlock(&allproc_lock);
 217         /*
 218          * Calculate object memory usage statistics.
 219          */
 220         mtx_lock(&vm_object_list_mtx);
 221         TAILQ_FOREACH(object, &vm_object_list, object_list) {
 222                 /*
 223                  * Perform unsynchronized reads on the object.  In
 224                  * this case, the lack of synchronization should not
 225                  * impair the accuracy of the reported statistics.
 226                  */
 227                 if ((object->flags & OBJ_FICTITIOUS) != 0) {
 228                         /*
 229                          * Devices, like /dev/mem, will badly skew our totals.
 230                          */
 231                         continue;
 232                 }
 233                 if (object->ref_count == 0) {
 234                         /*
 235                          * Also skip unreferenced objects, including
 236                          * vnodes representing mounted file systems.
 237                          */
 238                         continue;
 239                 }
 240                 if (object->ref_count == 1 &&
 241                     (object->flags & (OBJ_ANON | OBJ_SWAP)) == OBJ_SWAP) {
 242                         /*
 243                          * Also skip otherwise unreferenced swap
 244                          * objects backing tmpfs vnodes, and POSIX or
 245                          * SysV shared memory.
 246                          */
 247                         continue;
 248                 }
 249                 total.t_vm += object->size;
 250                 total.t_rm += object->resident_page_count;
 251                 if (vm_object_is_active(object)) {
 252                         total.t_avm += object->size;
 253                         total.t_arm += object->resident_page_count;
 254                 }
 255                 if (object->shadow_count > 1) {
 256                         /* shared object */
 257                         total.t_vmshr += object->size;
 258                         total.t_rmshr += object->resident_page_count;
 259                         if (vm_object_is_active(object)) {
 260                                 total.t_avmshr += object->size;
 261                                 total.t_armshr += object->resident_page_count;
 262                         }
 263                 }
 264         }
 265         mtx_unlock(&vm_object_list_mtx);
 266         total.t_pw = vm_wait_count();
 267         total.t_free = vm_free_count();
 268 #if defined(COMPAT_FREEBSD11)
 269         /* sysctl(8) allocates twice as much memory as reported by sysctl(3) */
 270         if (curproc->p_osrel < P_OSREL_VMTOTAL64 && (req->oldlen ==
 271             sizeof(total11) || req->oldlen == 2 * sizeof(total11))) {
 272                 bzero(&total11, sizeof(total11));
 273                 total11.t_rq = total.t_rq;
 274                 total11.t_dw = total.t_dw;
 275                 total11.t_pw = total.t_pw;
 276                 total11.t_sl = total.t_sl;
 277                 total11.t_sw = total.t_sw;
 278                 total11.t_vm = total.t_vm;      /* truncate */
 279                 total11.t_avm = total.t_avm;    /* truncate */
 280                 total11.t_rm = total.t_rm;      /* truncate */
 281                 total11.t_arm = total.t_arm;    /* truncate */
 282                 total11.t_vmshr = total.t_vmshr;        /* truncate */
 283                 total11.t_avmshr = total.t_avmshr;      /* truncate */
 284                 total11.t_rmshr = total.t_rmshr;        /* truncate */
 285                 total11.t_armshr = total.t_armshr;      /* truncate */
 286                 total11.t_free = total.t_free;          /* truncate */
 287                 return (SYSCTL_OUT(req, &total11, sizeof(total11)));
 288         }
 289 #endif
 290         return (SYSCTL_OUT(req, &total, sizeof(total)));
 291 }
 292
 293 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE | CTLFLAG_RD |
 294     CTLFLAG_MPSAFE, NULL, 0, vmtotal, "S,vmtotal",
 295     "System virtual memory statistics");
 296 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 297     "VM meter stats");
 298 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 299     "VM meter sys stats");
 300 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 301     "VM meter vm stats");
 302 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 303     "VM meter misc stats");
 304
 305 static int
 306 sysctl_handle_vmstat(SYSCTL_HANDLER_ARGS)
 307 {
 308         uint64_t val;
 309 #ifdef COMPAT_FREEBSD11
 310         uint32_t val32;
 311 #endif
 312
 313         val = counter_u64_fetch(*(counter_u64_t *)arg1);
 314 #ifdef COMPAT_FREEBSD11
 315         if (req->oldlen == sizeof(val32)) {
 316                 val32 = val;            /* truncate */
 317                 return (SYSCTL_OUT(req, &val32, sizeof(val32)));
 318         }
 319 #endif
 320         return (SYSCTL_OUT(req, &val, sizeof(val)));
 321 }
 322
 323 #define VM_STATS(parent, var, descr) \
 324     SYSCTL_OID(parent, OID_AUTO, var, CTLTYPE_U64 | CTLFLAG_MPSAFE | \
 325     CTLFLAG_RD, &vm_cnt.var, 0, sysctl_handle_vmstat, "QU", descr)
 326 #define VM_STATS_VM(var, descr)         VM_STATS(_vm_stats_vm, var, descr)
 327 #define VM_STATS_SYS(var, descr)        VM_STATS(_vm_stats_sys, var, descr)
 328
 329 VM_STATS_SYS(v_swtch, "Context switches");
 330 VM_STATS_SYS(v_trap, "Traps");
 331 VM_STATS_SYS(v_syscall, "System calls");
 332 VM_STATS_SYS(v_intr, "Device interrupts");
 333 VM_STATS_SYS(v_soft, "Software interrupts");
 334 VM_STATS_VM(v_vm_faults, "Address memory faults");
 335 VM_STATS_VM(v_io_faults, "Page faults requiring I/O");
 336 VM_STATS_VM(v_cow_faults, "Copy-on-write faults");
 337 VM_STATS_VM(v_cow_optim, "Optimized COW faults");
 338 VM_STATS_VM(v_zfod, "Pages zero-filled on demand");
 339 VM_STATS_VM(v_ozfod, "Optimized zero fill pages");
 340 VM_STATS_VM(v_swapin, "Swap pager pageins");
 341 VM_STATS_VM(v_swapout, "Swap pager pageouts");
 342 VM_STATS_VM(v_swappgsin, "Swap pages swapped in");
 343 VM_STATS_VM(v_swappgsout, "Swap pages swapped out");
 344 VM_STATS_VM(v_vnodein, "Vnode pager pageins");
 345 VM_STATS_VM(v_vnodeout, "Vnode pager pageouts");
 346 VM_STATS_VM(v_vnodepgsin, "Vnode pages paged in");
 347 VM_STATS_VM(v_vnodepgsout, "Vnode pages paged out");
 348 VM_STATS_VM(v_intrans, "In transit page faults");
 349 VM_STATS_VM(v_reactivated, "Pages reactivated by pagedaemon");
 350 VM_STATS_VM(v_pdwakeups, "Pagedaemon wakeups");
 351 VM_STATS_VM(v_pdshortfalls, "Page reclamation shortfalls");
 352 VM_STATS_VM(v_dfree, "Pages freed by pagedaemon");
 353 VM_STATS_VM(v_pfree, "Pages freed by exiting processes");
 354 VM_STATS_VM(v_tfree, "Total pages freed");
 355 VM_STATS_VM(v_forks, "Number of fork() calls");
 356 VM_STATS_VM(v_vforks, "Number of vfork() calls");
 357 VM_STATS_VM(v_rforks, "Number of rfork() calls");
 358 VM_STATS_VM(v_kthreads, "Number of fork() calls by kernel");
 359 VM_STATS_VM(v_forkpages, "VM pages affected by fork()");
 360 VM_STATS_VM(v_vforkpages, "VM pages affected by vfork()");
 361 VM_STATS_VM(v_rforkpages, "VM pages affected by rfork()");
 362 VM_STATS_VM(v_kthreadpages, "VM pages affected by fork() by kernel");
 363
 364 static int
 365 sysctl_handle_vmstat_proc(SYSCTL_HANDLER_ARGS)
 366 {
 367         u_int (*fn)(void);
 368         uint32_t val;
 369
 370         fn = arg1;
 371         val = fn();
 372         return (SYSCTL_OUT(req, &val, sizeof(val)));
 373 }
 374
 375 #define VM_STATS_PROC(var, descr, fn) \
 376     SYSCTL_OID(_vm_stats_vm, OID_AUTO, var, CTLTYPE_U32 | CTLFLAG_MPSAFE | \
 377     CTLFLAG_RD, fn, 0, sysctl_handle_vmstat_proc, "IU", descr)
 378
 379 #define VM_STATS_UINT(var, descr)       \
 380     SYSCTL_UINT(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 381 #define VM_STATS_ULONG(var, descr)      \
 382     SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 383
 384 VM_STATS_UINT(v_page_size, "Page size in bytes");
 385 VM_STATS_UINT(v_page_count, "Total number of pages in system");
 386 VM_STATS_UINT(v_free_reserved, "Pages reserved for deadlock");
 387 VM_STATS_UINT(v_free_target, "Pages desired free");
 388 VM_STATS_UINT(v_free_min, "Minimum low-free-pages threshold");
 389 VM_STATS_PROC(v_free_count, "Free pages", vm_free_count);
 390 VM_STATS_PROC(v_wire_count, "Wired pages", vm_wire_count);
 391 VM_STATS_PROC(v_active_count, "Active pages", vm_active_count);
 392 VM_STATS_UINT(v_inactive_target, "Desired inactive pages");
 393 VM_STATS_PROC(v_inactive_count, "Inactive pages", vm_inactive_count);
 394 VM_STATS_PROC(v_laundry_count, "Pages eligible for laundering",
 395     vm_laundry_count);
 396 VM_STATS_UINT(v_pageout_free_min, "Min pages reserved for kernel");
 397 VM_STATS_UINT(v_interrupt_free_min, "Reserved pages for interrupt code");
 398 VM_STATS_UINT(v_free_severe, "Severe page depletion point");
 399
 400 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, v_user_wire_count, CTLFLAG_RD,
 401     &vm_user_wire_count, 0, "User-wired virtual memory");
 402
 403 #ifdef COMPAT_FREEBSD11
 404 /*
 405  * Provide compatibility sysctls for the benefit of old utilities which exit
 406  * with an error if they cannot be found.
 407  */
 408 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_cache_count, CTLFLAG_RD,
 409     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 410 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_tcached, CTLFLAG_RD,
 411     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 412 #endif
 413
 414 u_int
 415 vm_free_count(void)
 416 {
 417         u_int v;
 418         int i;
 419
 420         v = 0;
 421         for (i = 0; i < vm_ndomains; i++)
 422                 v += vm_dom[i].vmd_free_count;
 423
 424         return (v);
 425 }
 426
 427 static u_int
 428 vm_pagequeue_count(int pq)
 429 {
 430         u_int v;
 431         int i;
 432
 433         v = 0;
 434         for (i = 0; i < vm_ndomains; i++)
 435                 v += vm_dom[i].vmd_pagequeues[pq].pq_cnt;
 436
 437         return (v);
 438 }
 439
 440 u_int
 441 vm_active_count(void)
 442 {
 443
 444         return (vm_pagequeue_count(PQ_ACTIVE));
 445 }
 446
 447 u_int
 448 vm_inactive_count(void)
 449 {
 450
 451         return (vm_pagequeue_count(PQ_INACTIVE));
 452 }
 453
 454 u_int
 455 vm_laundry_count(void)
 456 {
 457
 458         return (vm_pagequeue_count(PQ_LAUNDRY));
 459 }
 460
 461 static int
 462 sysctl_vm_pdpages(SYSCTL_HANDLER_ARGS)
 463 {
 464         struct vm_pagequeue *pq;
 465         uint64_t ret;
 466         int dom, i;
 467
 468         ret = counter_u64_fetch(vm_cnt.v_pdpages);
 469         for (dom = 0; dom < vm_ndomains; dom++)
 470                 for (i = 0; i < PQ_COUNT; i++) {
 471                         pq = &VM_DOMAIN(dom)->vmd_pagequeues[i];
 472                         ret += pq->pq_pdpages;
 473                 }
 474         return (SYSCTL_OUT(req, &ret, sizeof(ret)));
 475 }
 476 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages,
 477     CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_vm_pdpages, "QU",
 478     "Pages analyzed by pagedaemon");
 479
 480 static void
 481 vm_domain_stats_init(struct vm_domain *vmd, struct sysctl_oid *parent)
 482 {
 483         struct sysctl_oid *oid;
 484
 485         vmd->vmd_oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(parent), OID_AUTO,
 486             vmd->vmd_name, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 487         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(vmd->vmd_oid), OID_AUTO,
 488             "stats", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 489         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 490             "free_count", CTLFLAG_RD, &vmd->vmd_free_count, 0,
 491             "Free pages");
 492         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 493             "active", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_ACTIVE].pq_cnt, 0,
 494             "Active pages");
 495         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 496             "actpdpgs", CTLFLAG_RD,
 497             &vmd->vmd_pagequeues[PQ_ACTIVE].pq_pdpages, 0,
 498             "Active pages scanned by the page daemon");
 499         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 500             "inactive", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_INACTIVE].pq_cnt, 0,
 501             "Inactive pages");
 502         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 503             "inactpdpgs", CTLFLAG_RD,
 504             &vmd->vmd_pagequeues[PQ_INACTIVE].pq_pdpages, 0,
 505             "Inactive pages scanned by the page daemon");
 506         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 507             "laundry", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_cnt, 0,
 508             "laundry pages");
 509         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 510             "laundpdpgs", CTLFLAG_RD,
 511             &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_pdpages, 0,
 512             "Laundry pages scanned by the page daemon");
 513         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "unswappable",
 514             CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_cnt, 0,
 515             "Unswappable pages");
 516         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 517             "unswppdpgs", CTLFLAG_RD,
 518             &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_pdpages, 0,
 519             "Unswappable pages scanned by the page daemon");
 520         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 521             "inactive_target", CTLFLAG_RD, &vmd->vmd_inactive_target, 0,
 522             "Target inactive pages");
 523         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 524             "free_target", CTLFLAG_RD, &vmd->vmd_free_target, 0,
 525             "Target free pages");
 526         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 527             "free_reserved", CTLFLAG_RD, &vmd->vmd_free_reserved, 0,
 528             "Reserved free pages");
 529         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 530             "free_min", CTLFLAG_RD, &vmd->vmd_free_min, 0,
 531             "Minimum free pages");
 532         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 533             "free_severe", CTLFLAG_RD, &vmd->vmd_free_severe, 0,
 534             "Severe free pages");
 535         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 536             "inactive_pps", CTLFLAG_RD, &vmd->vmd_inactive_pps, 0,
 537             "inactive pages freed/second");
 538
 539 }
 540
 541 static void
 542 vm_stats_init(void *arg __unused)
 543 {
 544         struct sysctl_oid *oid;
 545         int i;
 546
 547         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_vm), OID_AUTO,
 548             "domain", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 549         for (i = 0; i < vm_ndomains; i++)
 550                 vm_domain_stats_init(VM_DOMAIN(i), oid);
 551 }
 552
 553 SYSINIT(vmstats_init, SI_SUB_VM_CONF, SI_ORDER_FIRST, vm_stats_init, NULL);