The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_meter.c

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    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: releng/12.0/sys/vm/vm_meter.c 338278 2018-08-23 21:03:45Z markj $");
   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 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         u_int32_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 /*
  144  * This function aims to determine if the object is mapped,
  145  * specifically, if it is referenced by a vm_map_entry.  Because
  146  * objects occasionally acquire transient references that do not
  147  * represent a mapping, the method used here is inexact.  However, it
  148  * has very low overhead and is good enough for the advisory
  149  * vm.vmtotal sysctl.
  150  */
  151 static bool
  152 is_object_active(vm_object_t obj)
  153 {
  154 
  155         return (obj->ref_count > obj->shadow_count);
  156 }
  157 
  158 #if defined(COMPAT_FREEBSD11)
  159 struct vmtotal11 {
  160         int16_t t_rq;
  161         int16_t t_dw;
  162         int16_t t_pw;
  163         int16_t t_sl;
  164         int16_t t_sw;
  165         int32_t t_vm;
  166         int32_t t_avm;
  167         int32_t t_rm;
  168         int32_t t_arm;
  169         int32_t t_vmshr;
  170         int32_t t_avmshr;
  171         int32_t t_rmshr;
  172         int32_t t_armshr;
  173         int32_t t_free;
  174 };
  175 #endif
  176 
  177 static int
  178 vmtotal(SYSCTL_HANDLER_ARGS)
  179 {
  180         struct vmtotal total;
  181 #if defined(COMPAT_FREEBSD11)
  182         struct vmtotal11 total11;
  183 #endif
  184         vm_object_t object;
  185         struct proc *p;
  186         struct thread *td;
  187 
  188         if (req->oldptr == NULL) {
  189 #if defined(COMPAT_FREEBSD11)
  190                 if (curproc->p_osrel < P_OSREL_VMTOTAL64)
  191                         return (SYSCTL_OUT(req, NULL, sizeof(total11)));
  192 #endif
  193                 return (SYSCTL_OUT(req, NULL, sizeof(total)));
  194         }
  195         bzero(&total, sizeof(total));
  196 
  197         /*
  198          * Calculate process statistics.
  199          */
  200         sx_slock(&allproc_lock);
  201         FOREACH_PROC_IN_SYSTEM(p) {
  202                 if ((p->p_flag & P_SYSTEM) != 0)
  203                         continue;
  204                 PROC_LOCK(p);
  205                 if (p->p_state != PRS_NEW) {
  206                         FOREACH_THREAD_IN_PROC(p, td) {
  207                                 thread_lock(td);
  208                                 switch (td->td_state) {
  209                                 case TDS_INHIBITED:
  210                                         if (TD_IS_SWAPPED(td))
  211                                                 total.t_sw++;
  212                                         else if (TD_IS_SLEEPING(td)) {
  213                                                 if (td->td_priority <= PZERO)
  214                                                         total.t_dw++;
  215                                                 else
  216                                                         total.t_sl++;
  217                                         }
  218                                         break;
  219                                 case TDS_CAN_RUN:
  220                                         total.t_sw++;
  221                                         break;
  222                                 case TDS_RUNQ:
  223                                 case TDS_RUNNING:
  224                                         total.t_rq++;
  225                                         break;
  226                                 default:
  227                                         break;
  228                                 }
  229                                 thread_unlock(td);
  230                         }
  231                 }
  232                 PROC_UNLOCK(p);
  233         }
  234         sx_sunlock(&allproc_lock);
  235         /*
  236          * Calculate object memory usage statistics.
  237          */
  238         mtx_lock(&vm_object_list_mtx);
  239         TAILQ_FOREACH(object, &vm_object_list, object_list) {
  240                 /*
  241                  * Perform unsynchronized reads on the object.  In
  242                  * this case, the lack of synchronization should not
  243                  * impair the accuracy of the reported statistics.
  244                  */
  245                 if ((object->flags & OBJ_FICTITIOUS) != 0) {
  246                         /*
  247                          * Devices, like /dev/mem, will badly skew our totals.
  248                          */
  249                         continue;
  250                 }
  251                 if (object->ref_count == 0) {
  252                         /*
  253                          * Also skip unreferenced objects, including
  254                          * vnodes representing mounted file systems.
  255                          */
  256                         continue;
  257                 }
  258                 if (object->ref_count == 1 &&
  259                     (object->flags & OBJ_NOSPLIT) != 0) {
  260                         /*
  261                          * Also skip otherwise unreferenced swap
  262                          * objects backing tmpfs vnodes, and POSIX or
  263                          * SysV shared memory.
  264                          */
  265                         continue;
  266                 }
  267                 total.t_vm += object->size;
  268                 total.t_rm += object->resident_page_count;
  269                 if (is_object_active(object)) {
  270                         total.t_avm += object->size;
  271                         total.t_arm += object->resident_page_count;
  272                 }
  273                 if (object->shadow_count > 1) {
  274                         /* shared object */
  275                         total.t_vmshr += object->size;
  276                         total.t_rmshr += object->resident_page_count;
  277                         if (is_object_active(object)) {
  278                                 total.t_avmshr += object->size;
  279                                 total.t_armshr += object->resident_page_count;
  280                         }
  281                 }
  282         }
  283         mtx_unlock(&vm_object_list_mtx);
  284         total.t_pw = vm_wait_count();
  285         total.t_free = vm_free_count();
  286 #if defined(COMPAT_FREEBSD11)
  287         /* sysctl(8) allocates twice as much memory as reported by sysctl(3) */
  288         if (curproc->p_osrel < P_OSREL_VMTOTAL64 && (req->oldlen ==
  289             sizeof(total11) || req->oldlen == 2 * sizeof(total11))) {
  290                 bzero(&total11, sizeof(total11));
  291                 total11.t_rq = total.t_rq;
  292                 total11.t_dw = total.t_dw;
  293                 total11.t_pw = total.t_pw;
  294                 total11.t_sl = total.t_sl;
  295                 total11.t_sw = total.t_sw;
  296                 total11.t_vm = total.t_vm;      /* truncate */
  297                 total11.t_avm = total.t_avm;    /* truncate */
  298                 total11.t_rm = total.t_rm;      /* truncate */
  299                 total11.t_arm = total.t_arm;    /* truncate */
  300                 total11.t_vmshr = total.t_vmshr;        /* truncate */
  301                 total11.t_avmshr = total.t_avmshr;      /* truncate */
  302                 total11.t_rmshr = total.t_rmshr;        /* truncate */
  303                 total11.t_armshr = total.t_armshr;      /* truncate */
  304                 total11.t_free = total.t_free;          /* truncate */
  305                 return (SYSCTL_OUT(req, &total11, sizeof(total11)));
  306         }
  307 #endif
  308         return (SYSCTL_OUT(req, &total, sizeof(total)));
  309 }
  310 
  311 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE | CTLFLAG_RD |
  312     CTLFLAG_MPSAFE, NULL, 0, vmtotal, "S,vmtotal",
  313     "System virtual memory statistics");
  314 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
  315 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0,
  316         "VM meter sys stats");
  317 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0,
  318         "VM meter vm stats");
  319 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
  320 
  321 static int
  322 sysctl_handle_vmstat(SYSCTL_HANDLER_ARGS)
  323 {
  324         uint64_t val;
  325 #ifdef COMPAT_FREEBSD11
  326         uint32_t val32;
  327 #endif
  328 
  329         val = counter_u64_fetch(*(counter_u64_t *)arg1);
  330 #ifdef COMPAT_FREEBSD11
  331         if (req->oldlen == sizeof(val32)) {
  332                 val32 = val;            /* truncate */
  333                 return (SYSCTL_OUT(req, &val32, sizeof(val32)));
  334         }
  335 #endif
  336         return (SYSCTL_OUT(req, &val, sizeof(val)));
  337 }
  338 
  339 #define VM_STATS(parent, var, descr) \
  340     SYSCTL_OID(parent, OID_AUTO, var, CTLTYPE_U64 | CTLFLAG_MPSAFE | \
  341     CTLFLAG_RD, &vm_cnt.var, 0, sysctl_handle_vmstat, "QU", descr)
  342 #define VM_STATS_VM(var, descr)         VM_STATS(_vm_stats_vm, var, descr)
  343 #define VM_STATS_SYS(var, descr)        VM_STATS(_vm_stats_sys, var, descr)
  344 
  345 VM_STATS_SYS(v_swtch, "Context switches");
  346 VM_STATS_SYS(v_trap, "Traps");
  347 VM_STATS_SYS(v_syscall, "System calls");
  348 VM_STATS_SYS(v_intr, "Device interrupts");
  349 VM_STATS_SYS(v_soft, "Software interrupts");
  350 VM_STATS_VM(v_vm_faults, "Address memory faults");
  351 VM_STATS_VM(v_io_faults, "Page faults requiring I/O");
  352 VM_STATS_VM(v_cow_faults, "Copy-on-write faults");
  353 VM_STATS_VM(v_cow_optim, "Optimized COW faults");
  354 VM_STATS_VM(v_zfod, "Pages zero-filled on demand");
  355 VM_STATS_VM(v_ozfod, "Optimized zero fill pages");
  356 VM_STATS_VM(v_swapin, "Swap pager pageins");
  357 VM_STATS_VM(v_swapout, "Swap pager pageouts");
  358 VM_STATS_VM(v_swappgsin, "Swap pages swapped in");
  359 VM_STATS_VM(v_swappgsout, "Swap pages swapped out");
  360 VM_STATS_VM(v_vnodein, "Vnode pager pageins");
  361 VM_STATS_VM(v_vnodeout, "Vnode pager pageouts");
  362 VM_STATS_VM(v_vnodepgsin, "Vnode pages paged in");
  363 VM_STATS_VM(v_vnodepgsout, "Vnode pages paged out");
  364 VM_STATS_VM(v_intrans, "In transit page faults");
  365 VM_STATS_VM(v_reactivated, "Pages reactivated by pagedaemon");
  366 VM_STATS_VM(v_pdwakeups, "Pagedaemon wakeups");
  367 VM_STATS_VM(v_pdshortfalls, "Page reclamation shortfalls");
  368 VM_STATS_VM(v_dfree, "Pages freed by pagedaemon");
  369 VM_STATS_VM(v_pfree, "Pages freed by exiting processes");
  370 VM_STATS_VM(v_tfree, "Total pages freed");
  371 VM_STATS_VM(v_forks, "Number of fork() calls");
  372 VM_STATS_VM(v_vforks, "Number of vfork() calls");
  373 VM_STATS_VM(v_rforks, "Number of rfork() calls");
  374 VM_STATS_VM(v_kthreads, "Number of fork() calls by kernel");
  375 VM_STATS_VM(v_forkpages, "VM pages affected by fork()");
  376 VM_STATS_VM(v_vforkpages, "VM pages affected by vfork()");
  377 VM_STATS_VM(v_rforkpages, "VM pages affected by rfork()");
  378 VM_STATS_VM(v_kthreadpages, "VM pages affected by fork() by kernel");
  379 
  380 static int
  381 sysctl_handle_vmstat_proc(SYSCTL_HANDLER_ARGS)
  382 {
  383         u_int (*fn)(void);
  384         uint32_t val;
  385 
  386         fn = arg1;
  387         val = fn();
  388         return (SYSCTL_OUT(req, &val, sizeof(val)));
  389 }
  390 
  391 #define VM_STATS_PROC(var, descr, fn) \
  392     SYSCTL_OID(_vm_stats_vm, OID_AUTO, var, CTLTYPE_U32 | CTLFLAG_MPSAFE | \
  393     CTLFLAG_RD, fn, 0, sysctl_handle_vmstat_proc, "IU", descr)
  394 
  395 #define VM_STATS_UINT(var, descr)       \
  396     SYSCTL_UINT(_vm_stats_vm, OID_AUTO, var, CTLFLAG_RD, &vm_cnt.var, 0, descr)
  397 
  398 VM_STATS_UINT(v_page_size, "Page size in bytes");
  399 VM_STATS_UINT(v_page_count, "Total number of pages in system");
  400 VM_STATS_UINT(v_free_reserved, "Pages reserved for deadlock");
  401 VM_STATS_UINT(v_free_target, "Pages desired free");
  402 VM_STATS_UINT(v_free_min, "Minimum low-free-pages threshold");
  403 VM_STATS_PROC(v_free_count, "Free pages", vm_free_count);
  404 VM_STATS_PROC(v_wire_count, "Wired pages", vm_wire_count);
  405 VM_STATS_PROC(v_active_count, "Active pages", vm_active_count);
  406 VM_STATS_UINT(v_inactive_target, "Desired inactive pages");
  407 VM_STATS_PROC(v_inactive_count, "Inactive pages", vm_inactive_count);
  408 VM_STATS_PROC(v_laundry_count, "Pages eligible for laundering",
  409     vm_laundry_count);
  410 VM_STATS_UINT(v_pageout_free_min, "Min pages reserved for kernel");
  411 VM_STATS_UINT(v_interrupt_free_min, "Reserved pages for interrupt code");
  412 VM_STATS_UINT(v_free_severe, "Severe page depletion point");
  413 
  414 #ifdef COMPAT_FREEBSD11
  415 /*
  416  * Provide compatibility sysctls for the benefit of old utilities which exit
  417  * with an error if they cannot be found.
  418  */
  419 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_cache_count, CTLFLAG_RD,
  420     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
  421 SYSCTL_UINT(_vm_stats_vm, OID_AUTO, v_tcached, CTLFLAG_RD,
  422     SYSCTL_NULL_UINT_PTR, 0, "Dummy for compatibility");
  423 #endif
  424 
  425 u_int
  426 vm_free_count(void)
  427 {
  428         u_int v;
  429         int i;
  430 
  431         v = 0;
  432         for (i = 0; i < vm_ndomains; i++)
  433                 v += vm_dom[i].vmd_free_count;
  434 
  435         return (v);
  436 }
  437 
  438 static u_int
  439 vm_pagequeue_count(int pq)
  440 {
  441         u_int v;
  442         int i;
  443 
  444         v = 0;
  445         for (i = 0; i < vm_ndomains; i++)
  446                 v += vm_dom[i].vmd_pagequeues[pq].pq_cnt;
  447 
  448         return (v);
  449 }
  450 
  451 u_int
  452 vm_active_count(void)
  453 {
  454 
  455         return (vm_pagequeue_count(PQ_ACTIVE));
  456 }
  457 
  458 u_int
  459 vm_inactive_count(void)
  460 {
  461 
  462         return (vm_pagequeue_count(PQ_INACTIVE));
  463 }
  464 
  465 u_int
  466 vm_laundry_count(void)
  467 {
  468 
  469         return (vm_pagequeue_count(PQ_LAUNDRY));
  470 }
  471 
  472 static int
  473 sysctl_vm_pdpages(SYSCTL_HANDLER_ARGS)
  474 {
  475         struct vm_pagequeue *pq;
  476         uint64_t ret;
  477         int dom, i;
  478 
  479         ret = counter_u64_fetch(vm_cnt.v_pdpages);
  480         for (dom = 0; dom < vm_ndomains; dom++)
  481                 for (i = 0; i < PQ_COUNT; i++) {
  482                         pq = &VM_DOMAIN(dom)->vmd_pagequeues[i];
  483                         ret += pq->pq_pdpages;
  484                 }
  485         return (SYSCTL_OUT(req, &ret, sizeof(ret)));
  486 }
  487 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages,
  488     CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_RD, NULL, 0, sysctl_vm_pdpages, "QU",
  489     "Pages analyzed by pagedaemon");
  490 
  491 static void
  492 vm_domain_stats_init(struct vm_domain *vmd, struct sysctl_oid *parent)
  493 {
  494         struct sysctl_oid *oid;
  495 
  496         vmd->vmd_oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(parent), OID_AUTO,
  497             vmd->vmd_name, CTLFLAG_RD, NULL, "");
  498         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(vmd->vmd_oid), OID_AUTO,
  499             "stats", CTLFLAG_RD, NULL, "");
  500         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  501             "free_count", CTLFLAG_RD, &vmd->vmd_free_count, 0,
  502             "Free pages");
  503         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  504             "active", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_ACTIVE].pq_cnt, 0,
  505             "Active pages");
  506         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  507             "actpdpgs", CTLFLAG_RD,
  508             &vmd->vmd_pagequeues[PQ_ACTIVE].pq_pdpages, 0,
  509             "Active pages scanned by the page daemon");
  510         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  511             "inactive", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_INACTIVE].pq_cnt, 0,
  512             "Inactive pages");
  513         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  514             "inactpdpgs", CTLFLAG_RD,
  515             &vmd->vmd_pagequeues[PQ_INACTIVE].pq_pdpages, 0,
  516             "Inactive pages scanned by the page daemon");
  517         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  518             "laundry", CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_cnt, 0,
  519             "laundry pages");
  520         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  521             "laundpdpgs", CTLFLAG_RD,
  522             &vmd->vmd_pagequeues[PQ_LAUNDRY].pq_pdpages, 0,
  523             "Laundry pages scanned by the page daemon");
  524         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO, "unswappable",
  525             CTLFLAG_RD, &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_cnt, 0,
  526             "Unswappable pages");
  527         SYSCTL_ADD_U64(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  528             "unswppdpgs", CTLFLAG_RD,
  529             &vmd->vmd_pagequeues[PQ_UNSWAPPABLE].pq_pdpages, 0,
  530             "Unswappable pages scanned by the page daemon");
  531         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  532             "inactive_target", CTLFLAG_RD, &vmd->vmd_inactive_target, 0,
  533             "Target inactive pages");
  534         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  535             "free_target", CTLFLAG_RD, &vmd->vmd_free_target, 0,
  536             "Target free pages");
  537         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  538             "free_reserved", CTLFLAG_RD, &vmd->vmd_free_reserved, 0,
  539             "Reserved free pages");
  540         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  541             "free_min", CTLFLAG_RD, &vmd->vmd_free_min, 0,
  542             "Minimum free pages");
  543         SYSCTL_ADD_UINT(NULL, SYSCTL_CHILDREN(oid), OID_AUTO,
  544             "free_severe", CTLFLAG_RD, &vmd->vmd_free_severe, 0,
  545             "Severe free pages");
  546 
  547 }
  548 
  549 static void
  550 vm_stats_init(void *arg __unused)
  551 {
  552         struct sysctl_oid *oid;
  553         int i;
  554 
  555         oid = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_vm), OID_AUTO,
  556             "domain", CTLFLAG_RD, NULL, "");
  557         for (i = 0; i < vm_ndomains; i++)
  558                 vm_domain_stats_init(VM_DOMAIN(i), oid);
  559 }
  560 
  561 SYSINIT(vmstats_init, SI_SUB_VM_CONF, SI_ORDER_FIRST, vm_stats_init, NULL);

Cache object: cee889af9e41ead5a0be1d853349965b


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