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         u_int32_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 /*
 146  * This function aims to determine if the object is mapped,
 147  * specifically, if it is referenced by a vm_map_entry.  Because
 148  * objects occasionally acquire transient references that do not
 149  * represent a mapping, the method used here is inexact.  However, it
 150  * has very low overhead and is good enough for the advisory
 151  * vm.vmtotal sysctl.
 152  */
 153 static bool
 154 is_object_active(vm_object_t obj)
 155 {
 156
 157         return (obj->ref_count > obj->shadow_count);
 158 }
 159
 160 #if defined(COMPAT_FREEBSD11)
 161 struct vmtotal11 {
 162         int16_t t_rq;
 163         int16_t t_dw;
 164         int16_t t_pw;
 165         int16_t t_sl;
 166         int16_t t_sw;
 167         int32_t t_vm;
 168         int32_t t_avm;
 169         int32_t t_rm;
 170         int32_t t_arm;
 171         int32_t t_vmshr;
 172         int32_t t_avmshr;
 173         int32_t t_rmshr;
 174         int32_t t_armshr;
 175         int32_t t_free;
 176 };
 177 #endif
 178
 179 static int
 180 vmtotal(SYSCTL_HANDLER_ARGS)
 181 {
 182         struct vmtotal total;
 183 #if defined(COMPAT_FREEBSD11)
 184         struct vmtotal11 total11;
 185 #endif
 186         vm_object_t object;
 187         struct proc *p;
 188         struct thread *td;
 189
 190         if (req->oldptr == NULL) {
 191 #if defined(COMPAT_FREEBSD11)
 192                 if (curproc->p_osrel < P_OSREL_VMTOTAL64)
 193                         return (SYSCTL_OUT(req, NULL, sizeof(total11)));
 194 #endif
 195                 return (SYSCTL_OUT(req, NULL, sizeof(total)));
 196         }
 197         bzero(&total, sizeof(total));
 198
 199         /*
 200          * Calculate process statistics.
 201          */
 202         sx_slock(&allproc_lock);
 203         FOREACH_PROC_IN_SYSTEM(p) {
 204                 if ((p->p_flag & P_SYSTEM) != 0)
 205                         continue;
 206                 PROC_LOCK(p);
 207                 if (p->p_state != PRS_NEW) {
 208                         FOREACH_THREAD_IN_PROC(p, td) {
 209                                 thread_lock(td);
 210                                 switch (td->td_state) {
 211                                 case TDS_INHIBITED:
 212                                         if (TD_IS_SWAPPED(td))
 213                                                 total.t_sw++;
 214                                         else if (TD_IS_SLEEPING(td)) {
 215                                                 if (td->td_priority <= PZERO)
 216                                                         total.t_dw++;
 217                                                 else
 218                                                         total.t_sl++;
 219                                         }
 220                                         break;
 221                                 case TDS_CAN_RUN:
 222                                         total.t_sw++;
 223                                         break;
 224                                 case TDS_RUNQ:
 225                                 case TDS_RUNNING:
 226                                         total.t_rq++;
 227                                         break;
 228                                 default:
 229                                         break;
 230                                 }
 231                                 thread_unlock(td);
 232                         }
 233                 }
 234                 PROC_UNLOCK(p);
 235         }
 236         sx_sunlock(&allproc_lock);
 237         /*
 238          * Calculate object memory usage statistics.
 239          */
 240         mtx_lock(&vm_object_list_mtx);
 241         TAILQ_FOREACH(object, &vm_object_list, object_list) {
 242                 /*
 243                  * Perform unsynchronized reads on the object.  In
 244                  * this case, the lack of synchronization should not
 245                  * impair the accuracy of the reported statistics.
 246                  */
 247                 if ((object->flags & OBJ_FICTITIOUS) != 0) {
 248                         /*
 249                          * Devices, like /dev/mem, will badly skew our totals.
 250                          */
 251                         continue;
 252                 }
 253                 if (object->ref_count == 0) {
 254                         /*
 255                          * Also skip unreferenced objects, including
 256                          * vnodes representing mounted file systems.
 257                          */
 258                         continue;
 259                 }
 260                 if (object->ref_count == 1 &&
 261                     (object->flags & OBJ_ANON) == 0) {
 262                         /*
 263                          * Also skip otherwise unreferenced swap
 264                          * objects backing tmpfs vnodes, and POSIX or
 265                          * SysV shared memory.
 266                          */
 267                         continue;
 268                 }
 269                 total.t_vm += object->size;
 270                 total.t_rm += object->resident_page_count;
 271                 if (is_object_active(object)) {
 272                         total.t_avm += object->size;
 273                         total.t_arm += object->resident_page_count;
 274                 }
 275                 if (object->shadow_count > 1) {
 276                         /* shared object */
 277                         total.t_vmshr += object->size;
 278                         total.t_rmshr += object->resident_page_count;
 279                         if (is_object_active(object)) {
 280                                 total.t_avmshr += object->size;
 281                                 total.t_armshr += object->resident_page_count;
 282                         }
 283                 }
 284         }
 285         mtx_unlock(&vm_object_list_mtx);
 286         total.t_pw = vm_wait_count();
 287         total.t_free = vm_free_count();
 288 #if defined(COMPAT_FREEBSD11)
 289         /* sysctl(8) allocates twice as much memory as reported by sysctl(3) */
 290         if (curproc->p_osrel < P_OSREL_VMTOTAL64 && (req->oldlen ==
 291             sizeof(total11) || req->oldlen == 2 * sizeof(total11))) {
 292                 bzero(&total11, sizeof(total11));
 293                 total11.t_rq = total.t_rq;
 294                 total11.t_dw = total.t_dw;
 295                 total11.t_pw = total.t_pw;
 296                 total11.t_sl = total.t_sl;
 297                 total11.t_sw = total.t_sw;
 298                 total11.t_vm = total.t_vm;      /* truncate */
 299                 total11.t_avm = total.t_avm;    /* truncate */
 300                 total11.t_rm = total.t_rm;      /* truncate */
 301                 total11.t_arm = total.t_arm;    /* truncate */
 302                 total11.t_vmshr = total.t_vmshr;        /* truncate */
 303                 total11.t_avmshr = total.t_avmshr;      /* truncate */
 304                 total11.t_rmshr = total.t_rmshr;        /* truncate */
 305                 total11.t_armshr = total.t_armshr;      /* truncate */
 306                 total11.t_free = total.t_free;          /* truncate */
 307                 return (SYSCTL_OUT(req, &total11, sizeof(total11)));
 308         }
 309 #endif
 310         return (SYSCTL_OUT(req, &total, sizeof(total)));
 311 }
 312
 313 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE | CTLFLAG_RD |
 314     CTLFLAG_MPSAFE, NULL, 0, vmtotal, "S,vmtotal",
 315     "System virtual memory statistics");
 316 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 317     "VM meter stats");
 318 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 319     "VM meter sys stats");
 320 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 321     "VM meter vm stats");
 322 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
 323     "VM meter misc stats");
 324
 325 static int
 326 sysctl_handle_vmstat(SYSCTL_HANDLER_ARGS)
 327 {
 328         uint64_t val;
 329 #ifdef COMPAT_FREEBSD11
 330         uint32_t val32;
 331 #endif
 332
 333         val = counter_u64_fetch(*(counter_u64_t *)arg1);
 334 #ifdef COMPAT_FREEBSD11
 335         if (req->oldlen == sizeof(val32)) {
 336                 val32 = val;            /* truncate */
 337                 return (SYSCTL_OUT(req, &val32, sizeof(val32)));
 338         }
 339 #endif
 340         return (SYSCTL_OUT(req, &val, sizeof(val)));
 341 }
 342
 343 #define VM_STATS(parent, var, descr) \
 344     SYSCTL_OID(parent, OID_AUTO, var, CTLTYPE_U64 | CTLFLAG_MPSAFE | \
 345     CTLFLAG_RD, &vm_cnt.var, 0, sysctl_handle_vmstat, "QU", descr)
 346 #define VM_STATS_VM(var, descr)         VM_STATS(_vm_stats_vm, var, descr)
 347 #define VM_STATS_SYS(var, descr)        VM_STATS(_vm_stats_sys, var, descr)
 348
 349 VM_STATS_SYS(v_swtch, "Context switches");
 350 VM_STATS_SYS(v_trap, "Traps");
 351 VM_STATS_SYS(v_syscall, "System calls");
 352 VM_STATS_SYS(v_intr, "Device interrupts");
 353 VM_STATS_SYS(v_soft, "Software interrupts");
 354 VM_STATS_VM(v_vm_faults, "Address memory faults");
 355 VM_STATS_VM(v_io_faults, "Page faults requiring I/O");
 356 VM_STATS_VM(v_cow_faults, "Copy-on-write faults");
 357 VM_STATS_VM(v_cow_optim, "Optimized COW faults");
 358 VM_STATS_VM(v_zfod, "Pages zero-filled on demand");
 359 VM_STATS_VM(v_ozfod, "Optimized zero fill pages");
 360 VM_STATS_VM(v_swapin, "Swap pager pageins");
 361 VM_STATS_VM(v_swapout, "Swap pager pageouts");
 362 VM_STATS_VM(v_swappgsin, "Swap pages swapped in");
 363 VM_STATS_VM(v_swappgsout, "Swap pages swapped out");
 364 VM_STATS_VM(v_vnodein, "Vnode pager pageins");
 365 VM_STATS_VM(v_vnodeout, "Vnode pager pageouts");
 366 VM_STATS_VM(v_vnodepgsin, "Vnode pages paged in");
 367 VM_STATS_VM(v_vnodepgsout, "Vnode pages paged out");
 368 VM_STATS_VM(v_intrans, "In transit page faults");
 369 VM_STATS_VM(v_reactivated, "Pages reactivated by pagedaemon");
 370 VM_STATS_VM(v_pdwakeups, "Pagedaemon wakeups");
 371 VM_STATS_VM(v_pdshortfalls, "Page reclamation shortfalls");
 372 VM_STATS_VM(v_dfree, "Pages freed by pagedaemon");
 373 VM_STATS_VM(v_pfree, "Pages freed by exiting processes");
 374 VM_STATS_VM(v_tfree, "Total pages freed");
 375 VM_STATS_VM(v_forks, "Number of fork() calls");
 376 VM_STATS_VM(v_vforks, "Number of vfork() calls");
 377 VM_STATS_VM(v_rforks, "Number of rfork() calls");
 378 VM_STATS_VM(v_kthreads, "Number of fork() calls by kernel");
 379 VM_STATS_VM(v_forkpages, "VM pages affected by fork()");
 380 VM_STATS_VM(v_vforkpages, "VM pages affected by vfork()");
 381 VM_STATS_VM(v_rforkpages, "VM pages affected by rfork()");
 382 VM_STATS_VM(v_kthreadpages, "VM pages affected by fork() by kernel");
 383
 384 static int
 385 sysctl_handle_vmstat_proc(SYSCTL_HANDLER_ARGS)
 386 {
 387         u_int (*fn)(void);
 388         uint32_t val;
 389
 390         fn = arg1;
 391         val = fn();
 392         return (SYSCTL_OUT(req, &val, sizeof(val)));
 393 }
 394
 395 #define VM_STATS_PROC(var, descr, fn) \
 396     SYSCTL_OID(_vm_stats_vm, OID_AUTO, var, CTLTYPE_U32 | CTLFLAG_MPSAFE | \
 397     CTLFLAG_RD, fn, 0, sysctl_handle_vmstat_proc, "IU", descr)
 398
 399 #define VM_STATS_UINT(var, descr)       \
 400     SYSCTL_UINT(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 401 #define VM_STATS_ULONG(var, descr)      \
 402     SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
 403
 404 VM_STATS_UINT(v_page_size, "Page size in bytes");
 405 VM_STATS_UINT(v_page_count, "Total number of pages in system");
 406 VM_STATS_UINT(v_free_reserved, "Pages reserved for deadlock");
 407 VM_STATS_UINT(v_free_target, "Pages desired free");
 408 VM_STATS_UINT(v_free_min, "Minimum low-free-pages threshold");
 409 VM_STATS_PROC(v_free_count, "Free pages", vm_free_count);
 410 VM_STATS_PROC(v_wire_count, "Wired pages", vm_wire_count);
 411 VM_STATS_PROC(v_active_count, "Active pages", vm_active_count);
 412 VM_STATS_UINT(v_inactive_target, "Desired inactive pages");
 413 VM_STATS_PROC(v_inactive_count, "Inactive pages", vm_inactive_count);
 414 VM_STATS_PROC(v_laundry_count, "Pages eligible for laundering",
 415     vm_laundry_count);
 416 VM_STATS_UINT(v_pageout_free_min, "Min pages reserved for kernel");
 417 VM_STATS_UINT(v_interrupt_free_min, "Reserved pages for interrupt code");
 418 VM_STATS_UINT(v_free_severe, "Severe page depletion point");
 419
 420 SYSCTL_ULONG(_vm_stats_vm, OID_AUTO, v_user_wire_count, CTLFLAG_RD,
 421     &vm_user_wire_count, 0, "User-wired virtual memory");
 422
 423 #ifdef COMPAT_FREEBSD11
 424 /*
 425  * Provide compatibility sysctls for the benefit of old utilities which exit
 426  * with an error if they cannot be found.
 427  */
 428 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_cache_count, CTLFLAG_RD,
 429     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 430 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_tcached, CTLFLAG_RD,
 431     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
 432 #endif
 433
 434 u_int
 435 vm_free_count(void)
 436 {
 437         u_int v;
 438         int i;
 439
 440         v = 0;
 441         for (i = 0; i < vm_ndomains; i++)
 442                 v += vm_dom[i].vmd_free_count;
 443
 444         return (v);
 445 }
 446
 447 static u_int
 448 vm_pagequeue_count(int pq)
 449 {
 450         u_int v;
 451         int i;
 452
 453         v = 0;
 454         for (i = 0; i < vm_ndomains; i++)
 455                 v += vm_dom[i].vmd_pagequeues[pq].pq_cnt;
 456
 457         return (v);
 458 }
 459
 460 u_int
 461 vm_active_count(void)
 462 {
 463
 464         return (vm_pagequeue_count(PQ_ACTIVE));
 465 }
 466
 467 u_int
 468 vm_inactive_count(void)
 469 {
 470
 471         return (vm_pagequeue_count(PQ_INACTIVE));
 472 }
 473
 474 u_int
 475 vm_laundry_count(void)
 476 {
 477
 478         return (vm_pagequeue_count(PQ_LAUNDRY));
 479 }
 480
 481 static int
 482 sysctl_vm_pdpages(SYSCTL_HANDLER_ARGS)
 483 {
 484         struct vm_pagequeue *pq;
 485         uint64_t ret;
 486         int dom, i;
 487
 488         ret = counter_u64_fetch(vm_cnt.v_pdpages);
 489         for (dom = 0; dom < vm_ndomains; dom++)
 490                 for (i = 0; i < PQ_COUNT; i++) {
 491                         pq = &VM_DOMAIN(dom)->vmd_pagequeues[i];
 492                         ret += pq->pq_pdpages;
 493                 }
 494         return (SYSCTL_OUT(req, &ret, sizeof(ret)));
 495 }
 496 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages,
 497     CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_vm_pdpages, "QU",
 498     "Pages analyzed by pagedaemon");
 499
 500 static void
 501 vm_domain_stats_init(struct vm_domain *vmd, struct sysctl_oid *parent)
 502 {
 503         struct sysctl_oid *oid;
 504
 505         vmd->vmd_oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(parent), OID_AUTO,
 506             vmd->vmd_name, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 507         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(vmd->vmd_oid), OID_AUTO,
 508             "stats", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 509         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 510             "free_count", CTLFLAG_RD, &vmd->vmd_free_count, 0,
 511             "Free pages");
 512         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 513             "active", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_ACTIVE].pq_cnt, 0,
 514             "Active pages");
 515         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 516             "actpdpgs", CTLFLAG_RD,
 517             &vmd->vmd_pagequeues[PQ_ACTIVE].pq_pdpages, 0,
 518             "Active pages scanned by the page daemon");
 519         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 520             "inactive", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_INACTIVE].pq_cnt, 0,
 521             "Inactive pages");
 522         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 523             "inactpdpgs", CTLFLAG_RD,
 524             &vmd->vmd_pagequeues[PQ_INACTIVE].pq_pdpages, 0,
 525             "Inactive pages scanned by the page daemon");
 526         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 527             "laundry", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_cnt, 0,
 528             "laundry pages");
 529         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 530             "laundpdpgs", CTLFLAG_RD,
 531             &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_pdpages, 0,
 532             "Laundry pages scanned by the page daemon");
 533         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "unswappable",
 534             CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_cnt, 0,
 535             "Unswappable pages");
 536         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 537             "unswppdpgs", CTLFLAG_RD,
 538             &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_pdpages, 0,
 539             "Unswappable pages scanned by the page daemon");
 540         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 541             "inactive_target", CTLFLAG_RD, &vmd->vmd_inactive_target, 0,
 542             "Target inactive pages");
 543         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 544             "free_target", CTLFLAG_RD, &vmd->vmd_free_target, 0,
 545             "Target free pages");
 546         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 547             "free_reserved", CTLFLAG_RD, &vmd->vmd_free_reserved, 0,
 548             "Reserved free pages");
 549         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 550             "free_min", CTLFLAG_RD, &vmd->vmd_free_min, 0,
 551             "Minimum free pages");
 552         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 553             "free_severe", CTLFLAG_RD, &vmd->vmd_free_severe, 0,
 554             "Severe free pages");
 555         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
 556             "inactive_pps", CTLFLAG_RD, &vmd->vmd_inactive_pps, 0,
 557             "inactive pages freed/second");
 558
 559 }
 560
 561 static void
 562 vm_stats_init(void *arg __unused)
 563 {
 564         struct sysctl_oid *oid;
 565         int i;
 566
 567         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_vm), OID_AUTO,
 568             "domain", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
 569         for (i = 0; i < vm_ndomains; i++)
 570                 vm_domain_stats_init(VM_DOMAIN(i), oid);
 571 }
 572
 573 SYSINIT(vmstats_init, SI_SUB_VM_CONF, SI_ORDER_FIRST, vm_stats_init, NULL);