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 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/lock.h>
  41 #include <sys/malloc.h>
  42 #include <sys/mutex.h>
  43 #include <sys/proc.h>
  44 #include <sys/resource.h>
  45 #include <sys/rwlock.h>
  46 #include <sys/sx.h>
  47 #include <sys/vmmeter.h>
  48 #include <sys/smp.h>
  49
  50 #include <vm/vm.h>
  51 #include <vm/vm_page.h>
  52 #include <vm/vm_extern.h>
  53 #include <vm/vm_param.h>
  54 #include <vm/vm_phys.h>
  55 #include <vm/vm_pagequeue.h>
  56 #include <vm/pmap.h>
  57 #include <vm/vm_map.h>
  58 #include <vm/vm_object.h>
  59 #include <sys/sysctl.h>
  60
  61 struct vmmeter __read_mostly vm_cnt = {
  62         .v_swtch = EARLY_COUNTER,
  63         .v_trap = EARLY_COUNTER,
  64         .v_syscall = EARLY_COUNTER,
  65         .v_intr = EARLY_COUNTER,
  66         .v_soft = EARLY_COUNTER,
  67         .v_vm_faults = EARLY_COUNTER,
  68         .v_io_faults = EARLY_COUNTER,
  69         .v_cow_faults = EARLY_COUNTER,
  70         .v_cow_optim = EARLY_COUNTER,
  71         .v_zfod = EARLY_COUNTER,
  72         .v_ozfod = EARLY_COUNTER,
  73         .v_swapin = EARLY_COUNTER,
  74         .v_swapout = EARLY_COUNTER,
  75         .v_swappgsin = EARLY_COUNTER,
  76         .v_swappgsout = EARLY_COUNTER,
  77         .v_vnodein = EARLY_COUNTER,
  78         .v_vnodeout = EARLY_COUNTER,
  79         .v_vnodepgsin = EARLY_COUNTER,
  80         .v_vnodepgsout = EARLY_COUNTER,
  81         .v_intrans = EARLY_COUNTER,
  82         .v_reactivated = EARLY_COUNTER,
  83         .v_pdwakeups = EARLY_COUNTER,
  84         .v_pdpages = EARLY_COUNTER,
  85         .v_pdshortfalls = EARLY_COUNTER,
  86         .v_dfree = EARLY_COUNTER,
  87         .v_pfree = EARLY_COUNTER,
  88         .v_tfree = EARLY_COUNTER,
  89         .v_forks = EARLY_COUNTER,
  90         .v_vforks = EARLY_COUNTER,
  91         .v_rforks = EARLY_COUNTER,
  92         .v_kthreads = EARLY_COUNTER,
  93         .v_forkpages = EARLY_COUNTER,
  94         .v_vforkpages = EARLY_COUNTER,
  95         .v_rforkpages = EARLY_COUNTER,
  96         .v_kthreadpages = EARLY_COUNTER,
  97         .v_wire_count = EARLY_COUNTER,
  98 };
  99
 100 u_long __exclusive_cache_line vm_user_wire_count;
 101
 102 static void
 103 vmcounter_startup(void)
 104 {
 105         counter_u64_t *cnt = (counter_u64_t *)&vm_cnt;
 106
 107         COUNTER_ARRAY_ALLOC(cnt, VM_METER_NCOUNTERS, M_WAITOK);
 108 }
 109 SYSINIT(counter, SI_SUB_KMEM, SI_ORDER_FIRST, vmcounter_startup, NULL);
 110
 111 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
 112         CTLFLAG_RW, &vm_cnt.v_free_min, 0, "Minimum low-free-pages threshold");
 113 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
 114         CTLFLAG_RW, &vm_cnt.v_free_target, 0, "Desired free pages");
 115 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
 116         CTLFLAG_RW, &vm_cnt.v_free_reserved, 0, "Pages reserved for deadlock");
 117 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
 118         CTLFLAG_RW, &vm_cnt.v_inactive_target, 0, "Pages desired inactive");
 119 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
 120         CTLFLAG_RW, &vm_cnt.v_pageout_free_min, 0, "Min pages reserved for kernel");
 121 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
 122         CTLFLAG_RW, &vm_cnt.v_free_severe, 0, "Severe page depletion point");
 123
 124 static int
 125 sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS)
 126 {
 127
 128 #ifdef SCTL_MASK32
 129         uint32_t la[4];
 130
 131         if (req->flags & SCTL_MASK32) {
 132                 la[0] = averunnable.ldavg[0];
 133                 la[1] = averunnable.ldavg[1];
 134                 la[2] = averunnable.ldavg[2];
 135                 la[3] = averunnable.fscale;
 136                 return SYSCTL_OUT(req, la, sizeof(la));
 137         } else
 138 #endif
 139                 return SYSCTL_OUT(req, &averunnable, sizeof(averunnable));
 140 }
 141 SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD |
 142     CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg",
 143     "Machine loadaverage history");
 144
 145 #if defined(COMPAT_FREEBSD11)
 146 struct vmtotal11 {
 147         int16_t t_rq;
 148         int16_t t_dw;
 149         int16_t t_pw;
 150         int16_t t_sl;
 151         int16_t t_sw;
 152         int32_t t_vm;
 153         int32_t t_avm;
 154         int32_t t_rm;
 155         int32_t t_arm;
 156         int32_t t_vmshr;
 157         int32_t t_avmshr;
 158         int32_t t_rmshr;
 159         int32_t t_armshr;
 160         int32_t t_free;
 161 };
 162 #endif
 163
 164 static int
 165 vmtotal(SYSCTL_HANDLER_ARGS)
 166 {
 167         struct vmtotal total;
 168 #if defined(COMPAT_FREEBSD11)
 169         struct vmtotal11 total11;
 170 #endif
 171         vm_object_t object;
 172         struct proc *p;
 173         struct thread *td;
 174
 175         if (req->oldptr == NULL) {
 176 #if defined(COMPAT_FREEBSD11)
 177                 if (curproc->p_osrel < P_OSREL_VMTOTAL64)
 178                         return (SYSCTL_OUT(req, NULL, sizeof(total11)));
 179 #endif
 180                 return (SYSCTL_OUT(req, NULL, sizeof(total)));
 181         }
 182         bzero(&total, sizeof(total));
 183
 184         /*
 185          * Calculate process statistics.
 186          */
 187         sx_slock(&allproc_lock);
 188         FOREACH_PROC_IN_SYSTEM(p) {
 189                 if ((p->p_flag & P_SYSTEM) != 0)
 190                         continue;
 191                 PROC_LOCK(p);
 192                 if (p->p_state != PRS_NEW) {
 193                         FOREACH_THREAD_IN_PROC(p, td) {
 194                                 thread_lock(td);
 195                                 switch (TD_GET_STATE(td)) {
 196                                 case TDS_INHIBITED:
 197                                         if (TD_IS_SWAPPED(td))
 198                                                 total.t_sw++;
 199                                         else if (TD_IS_SLEEPING(td)) {
 200                                                 if (td->td_priority <= PZERO)
 201                                                         total.t_dw++;
 202                                                 else
 203                                                         total.t_sl++;
 204                                         }
 205                                         break;
 206                                 case TDS_CAN_RUN:
 207                                         total.t_sw++;
 208                                         break;
 209                                 case TDS_RUNQ:
 210                                 case TDS_RUNNING:
 211                                         total.t_rq++;
 212                                         break;
 213                                 default:
 214                                         break;
 215                                 }
 216                                 thread_unlock(td);
 217                         }
 218                 }
 219                 PROC_UNLOCK(p);
 220         }
 221         sx_sunlock(&allproc_lock);
 222         /*
 223          * Calculate object memory usage statistics.
 224          */
 225         mtx_lock(&vm_object_list_mtx);
 226         TAILQ_FOREACH(object, &vm_object_list, object_list) {
 227                 /*
 228                  * Perform unsynchronized reads on the object.  In
 229                  * this case, the lack of synchronization should not
 230                  * impair the accuracy of the reported statistics.
 231                  */
 232                 if ((object->flags & OBJ_FICTITIOUS) != 0) {
 233                         /*
 234                          * Devices, like /dev/mem, will badly skew our totals.
 235                          */
 236                         continue;
 237                 }
 238                 if (object->ref_count == 0) {
 239                         /*
 240                          * Also skip unreferenced objects, including
 241                          * vnodes representing mounted file systems.
 242                          */
 243                         continue;
 244                 }
 245                 if (object->ref_count == 1 &&
 246                     (object->flags & (OBJ_ANON | OBJ_SWAP)) == OBJ_SWAP) {
 247                         /*
 248                          * Also skip otherwise unreferenced swap
 249                          * objects backing tmpfs vnodes, and POSIX or
 250                          * SysV shared memory.
 251                          */
 252                         continue;
 253                 }
 254                 total.t_vm += object->size;
 255                 total.t_rm += object->resident_page_count;
 256                 if (vm_object_is_active(object)) {
 257                         total.t_avm += object->size;
 258                         total.t_arm += object->resident_page_count;
 259                 }
 260                 if (object->shadow_count > 1) {
 261                         /* shared object */
 262                         total.t_vmshr += object->size;
 263                         total.t_rmshr += object->resident_page_count;
 264                         if (vm_object_is_active(object)) {
 265                                 total.t_avmshr += object->size;
 266                                 total.t_armshr += object->resident_page_count;
 267                         }
 268                 }
 269         }
 270         mtx_unlock(&vm_object_list_mtx);
 271         total.t_pw = vm_wait_count();
 272         total.t_free = vm_free_count();
 273 #if defined(COMPAT_FREEBSD11)
 274         /* sysctl(8) allocates twice as much memory as reported by sysctl(3) */
 275         if (curproc->p_osrel < P_OSREL_VMTOTAL64 && (req->oldlen ==
 276             sizeof(total11) || req->oldlen == 2 * sizeof(total11))) {
 277                 bzero(&total11, sizeof(total11));
 278                 total11.t_rq = total.t_rq;
 279                 total11.t_dw = total.t_dw;
 280                 total11.t_pw = total.t_pw;
 281                 total11.t_sl = total.t_sl;
 282                 total11.t_sw = total.t_sw;
 283                 total11.t_vm = total.t_vm;      /* truncate */
 284                 total11.t_avm = total.t_avm;    /* truncate */
 285                 total11.t_rm = total.t_rm;      /* truncate */
 286                 total11.t_arm = total.t_arm;    /* truncate */
 287                 total11.t_vmshr = total.t_vmshr;        /* truncate */
 288                 total11.t_avmshr = total.t_avmshr;      /* truncate */
 289                 total11.t_rmshr = total.t_rmshr;        /* truncate */
 290                 total11.t_armshr = total.t_armshr;      /* truncate */
 291                 total11.t_free = total.t_free;          /* truncate */
 292                 return (SYSCTL_OUT(req, &total11, sizeof(total11)));
 293         }
 294 #endif
 295         return (SYSCTL_OUT(req, &total, sizeof(total)));
 296 }
 297
 298 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE | CTLFLAG_RD |
 299     CTLFLAG_MPSAFE, NULL, 0, vmtotal, "S,vmtotal",
 300     "System virtual memory statistics");
 301 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 302     "VM meter stats");
 303 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 304     "VM meter sys stats");
 305 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 306     "VM meter vm stats");
 307 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 308     "VM meter misc stats");
 309
 310 static int
 311 sysctl_handle_vmstat(SYSCTL_HANDLER_ARGS)
 312 {
 313         uint64_t val;
 314 #ifdef COMPAT_FREEBSD11
 315         uint32_t val32;
 316 #endif
 317
 318         val = counter_u64_fetch(*(counter_u64_t *)arg1);
 319 #ifdef COMPAT_FREEBSD11
 320         if (req->oldlen == sizeof(val32)) {
 321                 val32 = val;            /* truncate */
 322                 return (SYSCTL_OUT(req, &val32, sizeof(val32)));
 323         }
 324 #endif
 325         return (SYSCTL_OUT(req, &val, sizeof(val)));
 326 }
 327
 328 #define VM_STATS(parent, var, descr) \
 329     SYSCTL_OID(parent, OID_AUTO, var, CTLTYPE_U64 | CTLFLAG_MPSAFE | \
 330     CTLFLAG_RD, &vm_cnt.var, 0, sysctl_handle_vmstat, "QU", descr)
 331 #define VM_STATS_VM(var, descr)         VM_STATS(_vm_stats_vm, var, descr)
 332 #define VM_STATS_SYS(var, descr)        VM_STATS(_vm_stats_sys, var, descr)
 333
 334 VM_STATS_SYS(v_swtch, "Context switches");
 335 VM_STATS_SYS(v_trap, "Traps");
 336 VM_STATS_SYS(v_syscall, "System calls");
 337 VM_STATS_SYS(v_intr, "Device interrupts");
 338 VM_STATS_SYS(v_soft, "Software interrupts");
 339 VM_STATS_VM(v_vm_faults, "Address memory faults");
 340 VM_STATS_VM(v_io_faults, "Page faults requiring I/O");
 341 VM_STATS_VM(v_cow_faults, "Copy-on-write faults");
 342 VM_STATS_VM(v_cow_optim, "Optimized COW faults");
 343 VM_STATS_VM(v_zfod, "Pages zero-filled on demand");
 344 VM_STATS_VM(v_ozfod, "Optimized zero fill pages");
 345 VM_STATS_VM(v_swapin, "Swap pager pageins");
 346 VM_STATS_VM(v_swapout, "Swap pager pageouts");
 347 VM_STATS_VM(v_swappgsin, "Swap pages swapped in");
 348 VM_STATS_VM(v_swappgsout, "Swap pages swapped out");
 349 VM_STATS_VM(v_vnodein, "Vnode pager pageins");
 350 VM_STATS_VM(v_vnodeout, "Vnode pager pageouts");
 351 VM_STATS_VM(v_vnodepgsin, "Vnode pages paged in");
 352 VM_STATS_VM(v_vnodepgsout, "Vnode pages paged out");
 353 VM_STATS_VM(v_intrans, "In transit page faults");
 354 VM_STATS_VM(v_reactivated, "Pages reactivated by pagedaemon");
 355 VM_STATS_VM(v_pdwakeups, "Pagedaemon wakeups");
 356 VM_STATS_VM(v_pdshortfalls, "Page reclamation shortfalls");
 357 VM_STATS_VM(v_dfree, "Pages freed by pagedaemon");
 358 VM_STATS_VM(v_pfree, "Pages freed by exiting processes");
 359 VM_STATS_VM(v_tfree, "Total pages freed");
 360 VM_STATS_VM(v_forks, "Number of fork() calls");
 361 VM_STATS_VM(v_vforks, "Number of vfork() calls");
 362 VM_STATS_VM(v_rforks, "Number of rfork() calls");
 363 VM_STATS_VM(v_kthreads, "Number of fork() calls by kernel");
 364 VM_STATS_VM(v_forkpages, "VM pages affected by fork()");
 365 VM_STATS_VM(v_vforkpages, "VM pages affected by vfork()");
 366 VM_STATS_VM(v_rforkpages, "VM pages affected by rfork()");
 367 VM_STATS_VM(v_kthreadpages, "VM pages affected by fork() by kernel");
 368
 369 static int
 370 sysctl_handle_vmstat_proc(SYSCTL_HANDLER_ARGS)
 371 {
 372         u_int (*fn)(void);
 373         uint32_t val;
 374
 375         fn = arg1;
 376         val = fn();
 377         return (SYSCTL_OUT(req, &val, sizeof(val)));
 378 }
 379
 380 #define VM_STATS_PROC(var, descr, fn) \
 381     SYSCTL_OID(_vm_stats_vm, OID_AUTO, var, CTLTYPE_U32 | CTLFLAG_MPSAFE | \
 382     CTLFLAG_RD, fn, 0, sysctl_handle_vmstat_proc, "IU", descr)
 383
 384 #define VM_STATS_UINT(var, descr)       \
 385     SYSCTL_UINT(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 386 #define VM_STATS_ULONG(var, descr)      \
 387     SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 388
 389 VM_STATS_UINT(v_page_size, "Page size in bytes");
 390 VM_STATS_UINT(v_page_count, "Total number of pages in system");
 391 VM_STATS_UINT(v_free_reserved, "Pages reserved for deadlock");
 392 VM_STATS_UINT(v_free_target, "Pages desired free");
 393 VM_STATS_UINT(v_free_min, "Minimum low-free-pages threshold");
 394 VM_STATS_PROC(v_free_count, "Free pages", vm_free_count);
 395 VM_STATS_PROC(v_wire_count, "Wired pages", vm_wire_count);
 396 VM_STATS_PROC(v_active_count, "Active pages", vm_active_count);
 397 VM_STATS_UINT(v_inactive_target, "Desired inactive pages");
 398 VM_STATS_PROC(v_inactive_count, "Inactive pages", vm_inactive_count);
 399 VM_STATS_PROC(v_laundry_count, "Pages eligible for laundering",
 400     vm_laundry_count);
 401 VM_STATS_UINT(v_pageout_free_min, "Min pages reserved for kernel");
 402 VM_STATS_UINT(v_interrupt_free_min, "Reserved pages for interrupt code");
 403 VM_STATS_UINT(v_free_severe, "Severe page depletion point");
 404
 405 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, v_user_wire_count, CTLFLAG_RD,
 406     &vm_user_wire_count, 0, "User-wired virtual memory");
 407
 408 #ifdef COMPAT_FREEBSD11
 409 /*
 410  * Provide compatibility sysctls for the benefit of old utilities which exit
 411  * with an error if they cannot be found.
 412  */
 413 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_cache_count, CTLFLAG_RD,
 414     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 415 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_tcached, CTLFLAG_RD,
 416     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 417 #endif
 418
 419 u_int
 420 vm_free_count(void)
 421 {
 422         u_int v;
 423         int i;
 424
 425         v = 0;
 426         for (i = 0; i < vm_ndomains; i++)
 427                 v += vm_dom[i].vmd_free_count;
 428
 429         return (v);
 430 }
 431
 432 static u_int
 433 vm_pagequeue_count(int pq)
 434 {
 435         u_int v;
 436         int i;
 437
 438         v = 0;
 439         for (i = 0; i < vm_ndomains; i++)
 440                 v += vm_dom[i].vmd_pagequeues[pq].pq_cnt;
 441
 442         return (v);
 443 }
 444
 445 u_int
 446 vm_active_count(void)
 447 {
 448
 449         return (vm_pagequeue_count(PQ_ACTIVE));
 450 }
 451
 452 u_int
 453 vm_inactive_count(void)
 454 {
 455
 456         return (vm_pagequeue_count(PQ_INACTIVE));
 457 }
 458
 459 u_int
 460 vm_laundry_count(void)
 461 {
 462
 463         return (vm_pagequeue_count(PQ_LAUNDRY));
 464 }
 465
 466 static int
 467 sysctl_vm_pdpages(SYSCTL_HANDLER_ARGS)
 468 {
 469         struct vm_pagequeue *pq;
 470         uint64_t ret;
 471         int dom, i;
 472
 473         ret = counter_u64_fetch(vm_cnt.v_pdpages);
 474         for (dom = 0; dom < vm_ndomains; dom++)
 475                 for (i = 0; i < PQ_COUNT; i++) {
 476                         pq = &VM_DOMAIN(dom)->vmd_pagequeues[i];
 477                         ret += pq->pq_pdpages;
 478                 }
 479         return (SYSCTL_OUT(req, &ret, sizeof(ret)));
 480 }
 481 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages,
 482     CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_vm_pdpages, "QU",
 483     "Pages analyzed by pagedaemon");
 484
 485 static void
 486 vm_domain_stats_init(struct vm_domain *vmd, struct sysctl_oid *parent)
 487 {
 488         struct sysctl_oid *oid;
 489
 490         vmd->vmd_oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(parent), OID_AUTO,
 491             vmd->vmd_name, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 492         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(vmd->vmd_oid), OID_AUTO,
 493             "stats", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 494         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 495             "free_count", CTLFLAG_RD, &vmd->vmd_free_count, 0,
 496             "Free pages");
 497         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 498             "active", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_ACTIVE].pq_cnt, 0,
 499             "Active pages");
 500         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 501             "actpdpgs", CTLFLAG_RD,
 502             &vmd->vmd_pagequeues[PQ_ACTIVE].pq_pdpages, 0,
 503             "Active pages scanned by the page daemon");
 504         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 505             "inactive", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_INACTIVE].pq_cnt, 0,
 506             "Inactive pages");
 507         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 508             "inactpdpgs", CTLFLAG_RD,
 509             &vmd->vmd_pagequeues[PQ_INACTIVE].pq_pdpages, 0,
 510             "Inactive pages scanned by the page daemon");
 511         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 512             "laundry", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_cnt, 0,
 513             "laundry pages");
 514         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 515             "laundpdpgs", CTLFLAG_RD,
 516             &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_pdpages, 0,
 517             "Laundry pages scanned by the page daemon");
 518         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "unswappable",
 519             CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_cnt, 0,
 520             "Unswappable pages");
 521         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 522             "unswppdpgs", CTLFLAG_RD,
 523             &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_pdpages, 0,
 524             "Unswappable pages scanned by the page daemon");
 525         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 526             "inactive_target", CTLFLAG_RD, &vmd->vmd_inactive_target, 0,
 527             "Target inactive pages");
 528         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 529             "free_target", CTLFLAG_RD, &vmd->vmd_free_target, 0,
 530             "Target free pages");
 531         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 532             "free_reserved", CTLFLAG_RD, &vmd->vmd_free_reserved, 0,
 533             "Reserved free pages");
 534         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 535             "free_min", CTLFLAG_RD, &vmd->vmd_free_min, 0,
 536             "Minimum free pages");
 537         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 538             "free_severe", CTLFLAG_RD, &vmd->vmd_free_severe, 0,
 539             "Severe free pages");
 540         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 541             "inactive_pps", CTLFLAG_RD, &vmd->vmd_inactive_pps, 0,
 542             "inactive pages freed/second");
 543
 544 }
 545
 546 static void
 547 vm_stats_init(void *arg __unused)
 548 {
 549         struct sysctl_oid *oid;
 550         int i;
 551
 552         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_vm), OID_AUTO,
 553             "domain", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 554         for (i = 0; i < vm_ndomains; i++)
 555                 vm_domain_stats_init(VM_DOMAIN(i), oid);
 556 }
 557
 558 SYSINIT(vmstats_init, SI_SUB_VM_CONF, SI_ORDER_FIRST, vm_stats_init, NULL);