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  *      @(#)vm_meter.c  8.4 (Berkeley) 1/4/94
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/lock.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mutex.h>
  41 #include <sys/proc.h>
  42 #include <sys/resource.h>
  43 #include <sys/rwlock.h>
  44 #include <sys/sx.h>
  45 #include <sys/vmmeter.h>
  46 #include <sys/smp.h>
  47
  48 #include <vm/vm.h>
  49 #include <vm/vm_page.h>
  50 #include <vm/vm_extern.h>
  51 #include <vm/vm_param.h>
  52 #include <vm/vm_phys.h>
  53 #include <vm/vm_pagequeue.h>
  54 #include <vm/pmap.h>
  55 #include <vm/vm_map.h>
  56 #include <vm/vm_object.h>
  57 #include <sys/sysctl.h>
  58
  59 struct vmmeter __read_mostly vm_cnt = {
  60         .v_swtch = EARLY_COUNTER,
  61         .v_trap = EARLY_COUNTER,
  62         .v_syscall = EARLY_COUNTER,
  63         .v_intr = EARLY_COUNTER,
  64         .v_soft = EARLY_COUNTER,
  65         .v_vm_faults = EARLY_COUNTER,
  66         .v_io_faults = EARLY_COUNTER,
  67         .v_cow_faults = EARLY_COUNTER,
  68         .v_cow_optim = EARLY_COUNTER,
  69         .v_zfod = EARLY_COUNTER,
  70         .v_ozfod = EARLY_COUNTER,
  71         .v_swapin = EARLY_COUNTER,
  72         .v_swapout = EARLY_COUNTER,
  73         .v_swappgsin = EARLY_COUNTER,
  74         .v_swappgsout = EARLY_COUNTER,
  75         .v_vnodein = EARLY_COUNTER,
  76         .v_vnodeout = EARLY_COUNTER,
  77         .v_vnodepgsin = EARLY_COUNTER,
  78         .v_vnodepgsout = EARLY_COUNTER,
  79         .v_intrans = EARLY_COUNTER,
  80         .v_reactivated = EARLY_COUNTER,
  81         .v_pdwakeups = EARLY_COUNTER,
  82         .v_pdpages = EARLY_COUNTER,
  83         .v_pdshortfalls = EARLY_COUNTER,
  84         .v_dfree = EARLY_COUNTER,
  85         .v_pfree = EARLY_COUNTER,
  86         .v_tfree = EARLY_COUNTER,
  87         .v_forks = EARLY_COUNTER,
  88         .v_vforks = EARLY_COUNTER,
  89         .v_rforks = EARLY_COUNTER,
  90         .v_kthreads = EARLY_COUNTER,
  91         .v_forkpages = EARLY_COUNTER,
  92         .v_vforkpages = EARLY_COUNTER,
  93         .v_rforkpages = EARLY_COUNTER,
  94         .v_kthreadpages = EARLY_COUNTER,
  95         .v_wire_count = EARLY_COUNTER,
  96 };
  97
  98 u_long __exclusive_cache_line vm_user_wire_count;
  99
 100 static void
 101 vmcounter_startup(void)
 102 {
 103         counter_u64_t *cnt = (counter_u64_t *)&vm_cnt;
 104
 105         COUNTER_ARRAY_ALLOC(cnt, VM_METER_NCOUNTERS, M_WAITOK);
 106 }
 107 SYSINIT(counter, SI_SUB_KMEM, SI_ORDER_FIRST, vmcounter_startup, NULL);
 108
 109 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
 110         CTLFLAG_RW, &vm_cnt.v_free_min, 0, "Minimum low-free-pages threshold");
 111 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
 112         CTLFLAG_RW, &vm_cnt.v_free_target, 0, "Desired free pages");
 113 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
 114         CTLFLAG_RW, &vm_cnt.v_free_reserved, 0, "Pages reserved for deadlock");
 115 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
 116         CTLFLAG_RW, &vm_cnt.v_inactive_target, 0, "Pages desired inactive");
 117 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
 118         CTLFLAG_RW, &vm_cnt.v_pageout_free_min, 0, "Min pages reserved for kernel");
 119 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
 120         CTLFLAG_RW, &vm_cnt.v_free_severe, 0, "Severe page depletion point");
 121
 122 static int
 123 sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS)
 124 {
 125
 126 #ifdef SCTL_MASK32
 127         uint32_t la[4];
 128
 129         if (req->flags & SCTL_MASK32) {
 130                 la[0] = averunnable.ldavg[0];
 131                 la[1] = averunnable.ldavg[1];
 132                 la[2] = averunnable.ldavg[2];
 133                 la[3] = averunnable.fscale;
 134                 return SYSCTL_OUT(req, la, sizeof(la));
 135         } else
 136 #endif
 137                 return SYSCTL_OUT(req, &averunnable, sizeof(averunnable));
 138 }
 139 SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD |
 140     CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg",
 141     "Machine loadaverage history");
 142
 143 #if defined(COMPAT_FREEBSD11)
 144 struct vmtotal11 {
 145         int16_t t_rq;
 146         int16_t t_dw;
 147         int16_t t_pw;
 148         int16_t t_sl;
 149         int16_t t_sw;
 150         int32_t t_vm;
 151         int32_t t_avm;
 152         int32_t t_rm;
 153         int32_t t_arm;
 154         int32_t t_vmshr;
 155         int32_t t_avmshr;
 156         int32_t t_rmshr;
 157         int32_t t_armshr;
 158         int32_t t_free;
 159 };
 160 #endif
 161
 162 static int
 163 vmtotal(SYSCTL_HANDLER_ARGS)
 164 {
 165         struct vmtotal total;
 166 #if defined(COMPAT_FREEBSD11)
 167         struct vmtotal11 total11;
 168 #endif
 169         vm_object_t object;
 170         struct proc *p;
 171         struct thread *td;
 172
 173         if (req->oldptr == NULL) {
 174 #if defined(COMPAT_FREEBSD11)
 175                 if (curproc->p_osrel < P_OSREL_VMTOTAL64)
 176                         return (SYSCTL_OUT(req, NULL, sizeof(total11)));
 177 #endif
 178                 return (SYSCTL_OUT(req, NULL, sizeof(total)));
 179         }
 180         bzero(&total, sizeof(total));
 181
 182         /*
 183          * Calculate process statistics.
 184          */
 185         sx_slock(&allproc_lock);
 186         FOREACH_PROC_IN_SYSTEM(p) {
 187                 if ((p->p_flag & P_SYSTEM) != 0)
 188                         continue;
 189                 PROC_LOCK(p);
 190                 if (p->p_state != PRS_NEW) {
 191                         FOREACH_THREAD_IN_PROC(p, td) {
 192                                 thread_lock(td);
 193                                 switch (TD_GET_STATE(td)) {
 194                                 case TDS_INHIBITED:
 195                                         if (TD_IS_SWAPPED(td))
 196                                                 total.t_sw++;
 197                                         else if (TD_IS_SLEEPING(td)) {
 198                                                 if (td->td_priority <= PZERO)
 199                                                         total.t_dw++;
 200                                                 else
 201                                                         total.t_sl++;
 202                                         }
 203                                         break;
 204                                 case TDS_CAN_RUN:
 205                                         total.t_sw++;
 206                                         break;
 207                                 case TDS_RUNQ:
 208                                 case TDS_RUNNING:
 209                                         total.t_rq++;
 210                                         break;
 211                                 default:
 212                                         break;
 213                                 }
 214                                 thread_unlock(td);
 215                         }
 216                 }
 217                 PROC_UNLOCK(p);
 218         }
 219         sx_sunlock(&allproc_lock);
 220         /*
 221          * Calculate object memory usage statistics.
 222          */
 223         mtx_lock(&vm_object_list_mtx);
 224         TAILQ_FOREACH(object, &vm_object_list, object_list) {
 225                 /*
 226                  * Perform unsynchronized reads on the object.  In
 227                  * this case, the lack of synchronization should not
 228                  * impair the accuracy of the reported statistics.
 229                  */
 230                 if ((object->flags & OBJ_FICTITIOUS) != 0) {
 231                         /*
 232                          * Devices, like /dev/mem, will badly skew our totals.
 233                          */
 234                         continue;
 235                 }
 236                 if (object->ref_count == 0) {
 237                         /*
 238                          * Also skip unreferenced objects, including
 239                          * vnodes representing mounted file systems.
 240                          */
 241                         continue;
 242                 }
 243                 if (object->ref_count == 1 &&
 244                     (object->flags & (OBJ_ANON | OBJ_SWAP)) == OBJ_SWAP) {
 245                         /*
 246                          * Also skip otherwise unreferenced swap
 247                          * objects backing tmpfs vnodes, and POSIX or
 248                          * SysV shared memory.
 249                          */
 250                         continue;
 251                 }
 252                 total.t_vm += object->size;
 253                 total.t_rm += object->resident_page_count;
 254                 if (vm_object_is_active(object)) {
 255                         total.t_avm += object->size;
 256                         total.t_arm += object->resident_page_count;
 257                 }
 258                 if (object->shadow_count > 1) {
 259                         /* shared object */
 260                         total.t_vmshr += object->size;
 261                         total.t_rmshr += object->resident_page_count;
 262                         if (vm_object_is_active(object)) {
 263                                 total.t_avmshr += object->size;
 264                                 total.t_armshr += object->resident_page_count;
 265                         }
 266                 }
 267         }
 268         mtx_unlock(&vm_object_list_mtx);
 269         total.t_pw = vm_wait_count();
 270         total.t_free = vm_free_count();
 271 #if defined(COMPAT_FREEBSD11)
 272         /* sysctl(8) allocates twice as much memory as reported by sysctl(3) */
 273         if (curproc->p_osrel < P_OSREL_VMTOTAL64 && (req->oldlen ==
 274             sizeof(total11) || req->oldlen == 2 * sizeof(total11))) {
 275                 bzero(&total11, sizeof(total11));
 276                 total11.t_rq = total.t_rq;
 277                 total11.t_dw = total.t_dw;
 278                 total11.t_pw = total.t_pw;
 279                 total11.t_sl = total.t_sl;
 280                 total11.t_sw = total.t_sw;
 281                 total11.t_vm = total.t_vm;      /* truncate */
 282                 total11.t_avm = total.t_avm;    /* truncate */
 283                 total11.t_rm = total.t_rm;      /* truncate */
 284                 total11.t_arm = total.t_arm;    /* truncate */
 285                 total11.t_vmshr = total.t_vmshr;        /* truncate */
 286                 total11.t_avmshr = total.t_avmshr;      /* truncate */
 287                 total11.t_rmshr = total.t_rmshr;        /* truncate */
 288                 total11.t_armshr = total.t_armshr;      /* truncate */
 289                 total11.t_free = total.t_free;          /* truncate */
 290                 return (SYSCTL_OUT(req, &total11, sizeof(total11)));
 291         }
 292 #endif
 293         return (SYSCTL_OUT(req, &total, sizeof(total)));
 294 }
 295
 296 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE | CTLFLAG_RD |
 297     CTLFLAG_MPSAFE, NULL, 0, vmtotal, "S,vmtotal",
 298     "System virtual memory statistics");
 299 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 300     "VM meter stats");
 301 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 302     "VM meter sys stats");
 303 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 304     "VM meter vm stats");
 305 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 306     "VM meter misc stats");
 307
 308 static int
 309 sysctl_handle_vmstat(SYSCTL_HANDLER_ARGS)
 310 {
 311         uint64_t val;
 312 #ifdef COMPAT_FREEBSD11
 313         uint32_t val32;
 314 #endif
 315
 316         val = counter_u64_fetch(*(counter_u64_t *)arg1);
 317 #ifdef COMPAT_FREEBSD11
 318         if (req->oldlen == sizeof(val32)) {
 319                 val32 = val;            /* truncate */
 320                 return (SYSCTL_OUT(req, &val32, sizeof(val32)));
 321         }
 322 #endif
 323         return (SYSCTL_OUT(req, &val, sizeof(val)));
 324 }
 325
 326 #define VM_STATS(parent, var, descr) \
 327     SYSCTL_OID(parent, OID_AUTO, var, CTLTYPE_U64 | CTLFLAG_MPSAFE | \
 328     CTLFLAG_RD, &vm_cnt.var, 0, sysctl_handle_vmstat, "QU", descr)
 329 #define VM_STATS_VM(var, descr)         VM_STATS(_vm_stats_vm, var, descr)
 330 #define VM_STATS_SYS(var, descr)        VM_STATS(_vm_stats_sys, var, descr)
 331
 332 VM_STATS_SYS(v_swtch, "Context switches");
 333 VM_STATS_SYS(v_trap, "Traps");
 334 VM_STATS_SYS(v_syscall, "System calls");
 335 VM_STATS_SYS(v_intr, "Device interrupts");
 336 VM_STATS_SYS(v_soft, "Software interrupts");
 337 VM_STATS_VM(v_vm_faults, "Address memory faults");
 338 VM_STATS_VM(v_io_faults, "Page faults requiring I/O");
 339 VM_STATS_VM(v_cow_faults, "Copy-on-write faults");
 340 VM_STATS_VM(v_cow_optim, "Optimized COW faults");
 341 VM_STATS_VM(v_zfod, "Pages zero-filled on demand");
 342 VM_STATS_VM(v_ozfod, "Optimized zero fill pages");
 343 VM_STATS_VM(v_swapin, "Swap pager pageins");
 344 VM_STATS_VM(v_swapout, "Swap pager pageouts");
 345 VM_STATS_VM(v_swappgsin, "Swap pages swapped in");
 346 VM_STATS_VM(v_swappgsout, "Swap pages swapped out");
 347 VM_STATS_VM(v_vnodein, "Vnode pager pageins");
 348 VM_STATS_VM(v_vnodeout, "Vnode pager pageouts");
 349 VM_STATS_VM(v_vnodepgsin, "Vnode pages paged in");
 350 VM_STATS_VM(v_vnodepgsout, "Vnode pages paged out");
 351 VM_STATS_VM(v_intrans, "In transit page faults");
 352 VM_STATS_VM(v_reactivated, "Pages reactivated by pagedaemon");
 353 VM_STATS_VM(v_pdwakeups, "Pagedaemon wakeups");
 354 VM_STATS_VM(v_pdshortfalls, "Page reclamation shortfalls");
 355 VM_STATS_VM(v_dfree, "Pages freed by pagedaemon");
 356 VM_STATS_VM(v_pfree, "Pages freed by exiting processes");
 357 VM_STATS_VM(v_tfree, "Total pages freed");
 358 VM_STATS_VM(v_forks, "Number of fork() calls");
 359 VM_STATS_VM(v_vforks, "Number of vfork() calls");
 360 VM_STATS_VM(v_rforks, "Number of rfork() calls");
 361 VM_STATS_VM(v_kthreads, "Number of fork() calls by kernel");
 362 VM_STATS_VM(v_forkpages, "VM pages affected by fork()");
 363 VM_STATS_VM(v_vforkpages, "VM pages affected by vfork()");
 364 VM_STATS_VM(v_rforkpages, "VM pages affected by rfork()");
 365 VM_STATS_VM(v_kthreadpages, "VM pages affected by fork() by kernel");
 366
 367 static int
 368 sysctl_handle_vmstat_proc(SYSCTL_HANDLER_ARGS)
 369 {
 370         u_int (*fn)(void);
 371         uint32_t val;
 372
 373         fn = arg1;
 374         val = fn();
 375         return (SYSCTL_OUT(req, &val, sizeof(val)));
 376 }
 377
 378 #define VM_STATS_PROC(var, descr, fn) \
 379     SYSCTL_OID(_vm_stats_vm, OID_AUTO, var, CTLTYPE_U32 | CTLFLAG_MPSAFE | \
 380     CTLFLAG_RD, fn, 0, sysctl_handle_vmstat_proc, "IU", descr)
 381
 382 #define VM_STATS_UINT(var, descr)       \
 383     SYSCTL_UINT(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 384 #define VM_STATS_ULONG(var, descr)      \
 385     SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 386
 387 VM_STATS_UINT(v_page_size, "Page size in bytes");
 388 VM_STATS_UINT(v_page_count, "Total number of pages in system");
 389 VM_STATS_UINT(v_free_reserved, "Pages reserved for deadlock");
 390 VM_STATS_UINT(v_free_target, "Pages desired free");
 391 VM_STATS_UINT(v_free_min, "Minimum low-free-pages threshold");
 392 VM_STATS_PROC(v_free_count, "Free pages", vm_free_count);
 393 VM_STATS_PROC(v_wire_count, "Wired pages", vm_wire_count);
 394 VM_STATS_PROC(v_active_count, "Active pages", vm_active_count);
 395 VM_STATS_UINT(v_inactive_target, "Desired inactive pages");
 396 VM_STATS_PROC(v_inactive_count, "Inactive pages", vm_inactive_count);
 397 VM_STATS_PROC(v_laundry_count, "Pages eligible for laundering",
 398     vm_laundry_count);
 399 VM_STATS_UINT(v_pageout_free_min, "Min pages reserved for kernel");
 400 VM_STATS_UINT(v_interrupt_free_min, "Reserved pages for interrupt code");
 401 VM_STATS_UINT(v_free_severe, "Severe page depletion point");
 402
 403 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, v_user_wire_count, CTLFLAG_RD,
 404     &vm_user_wire_count, 0, "User-wired virtual memory");
 405
 406 #ifdef COMPAT_FREEBSD11
 407 /*
 408  * Provide compatibility sysctls for the benefit of old utilities which exit
 409  * with an error if they cannot be found.
 410  */
 411 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_cache_count, CTLFLAG_RD,
 412     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 413 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_tcached, CTLFLAG_RD,
 414     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 415 #endif
 416
 417 u_int
 418 vm_free_count(void)
 419 {
 420         u_int v;
 421         int i;
 422
 423         v = 0;
 424         for (i = 0; i < vm_ndomains; i++)
 425                 v += vm_dom[i].vmd_free_count;
 426
 427         return (v);
 428 }
 429
 430 static u_int
 431 vm_pagequeue_count(int pq)
 432 {
 433         u_int v;
 434         int i;
 435
 436         v = 0;
 437         for (i = 0; i < vm_ndomains; i++)
 438                 v += vm_dom[i].vmd_pagequeues[pq].pq_cnt;
 439
 440         return (v);
 441 }
 442
 443 u_int
 444 vm_active_count(void)
 445 {
 446
 447         return (vm_pagequeue_count(PQ_ACTIVE));
 448 }
 449
 450 u_int
 451 vm_inactive_count(void)
 452 {
 453
 454         return (vm_pagequeue_count(PQ_INACTIVE));
 455 }
 456
 457 u_int
 458 vm_laundry_count(void)
 459 {
 460
 461         return (vm_pagequeue_count(PQ_LAUNDRY));
 462 }
 463
 464 static int
 465 sysctl_vm_pdpages(SYSCTL_HANDLER_ARGS)
 466 {
 467         struct vm_pagequeue *pq;
 468         uint64_t ret;
 469         int dom, i;
 470
 471         ret = counter_u64_fetch(vm_cnt.v_pdpages);
 472         for (dom = 0; dom < vm_ndomains; dom++)
 473                 for (i = 0; i < PQ_COUNT; i++) {
 474                         pq = &VM_DOMAIN(dom)->vmd_pagequeues[i];
 475                         ret += pq->pq_pdpages;
 476                 }
 477         return (SYSCTL_OUT(req, &ret, sizeof(ret)));
 478 }
 479 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages,
 480     CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_vm_pdpages, "QU",
 481     "Pages analyzed by pagedaemon");
 482
 483 static void
 484 vm_domain_stats_init(struct vm_domain *vmd, struct sysctl_oid *parent)
 485 {
 486         struct sysctl_oid *oid;
 487
 488         vmd->vmd_oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(parent), OID_AUTO,
 489             vmd->vmd_name, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 490         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(vmd->vmd_oid), OID_AUTO,
 491             "stats", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 492         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 493             "free_count", CTLFLAG_RD, &vmd->vmd_free_count, 0,
 494             "Free pages");
 495         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 496             "active", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_ACTIVE].pq_cnt, 0,
 497             "Active pages");
 498         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 499             "actpdpgs", CTLFLAG_RD,
 500             &vmd->vmd_pagequeues[PQ_ACTIVE].pq_pdpages, 0,
 501             "Active pages scanned by the page daemon");
 502         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 503             "inactive", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_INACTIVE].pq_cnt, 0,
 504             "Inactive pages");
 505         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 506             "inactpdpgs", CTLFLAG_RD,
 507             &vmd->vmd_pagequeues[PQ_INACTIVE].pq_pdpages, 0,
 508             "Inactive pages scanned by the page daemon");
 509         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 510             "laundry", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_cnt, 0,
 511             "laundry pages");
 512         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 513             "laundpdpgs", CTLFLAG_RD,
 514             &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_pdpages, 0,
 515             "Laundry pages scanned by the page daemon");
 516         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "unswappable",
 517             CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_cnt, 0,
 518             "Unswappable pages");
 519         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 520             "unswppdpgs", CTLFLAG_RD,
 521             &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_pdpages, 0,
 522             "Unswappable pages scanned by the page daemon");
 523         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 524             "inactive_target", CTLFLAG_RD, &vmd->vmd_inactive_target, 0,
 525             "Target inactive pages");
 526         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 527             "free_target", CTLFLAG_RD, &vmd->vmd_free_target, 0,
 528             "Target free pages");
 529         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 530             "free_reserved", CTLFLAG_RD, &vmd->vmd_free_reserved, 0,
 531             "Reserved free pages");
 532         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 533             "free_min", CTLFLAG_RD, &vmd->vmd_free_min, 0,
 534             "Minimum free pages");
 535         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 536             "free_severe", CTLFLAG_RD, &vmd->vmd_free_severe, 0,
 537             "Severe free pages");
 538         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 539             "inactive_pps", CTLFLAG_RD, &vmd->vmd_inactive_pps, 0,
 540             "inactive pages freed/second");
 541
 542 }
 543
 544 static void
 545 vm_stats_init(void *arg __unused)
 546 {
 547         struct sysctl_oid *oid;
 548         int i;
 549
 550         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_vm), OID_AUTO,
 551             "domain", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 552         for (i = 0; i < vm_ndomains; i++)
 553                 vm_domain_stats_init(VM_DOMAIN(i), oid);
 554 }
 555
 556 SYSINIT(vmstats_init, SI_SUB_VM_CONF, SI_ORDER_FIRST, vm_stats_init, NULL);