Now available: 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 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 #include <sys/resource.h> 42 #include <sys/sx.h> 43 #include <sys/vmmeter.h> 44 #include <sys/smp.h> 45 46 #include <vm/vm.h> 47 #include <vm/vm_page.h> 48 #include <vm/vm_extern.h> 49 #include <vm/vm_param.h> 50 #include <vm/pmap.h> 51 #include <vm/vm_map.h> 52 #include <vm/vm_object.h> 53 #include <sys/sysctl.h> 54 55 struct vmmeter cnt; 56 57 int maxslp = MAXSLP; 58 59 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, 60 CTLFLAG_RW, &cnt.v_free_min, 0, ""); 61 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, 62 CTLFLAG_RW, &cnt.v_free_target, 0, ""); 63 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, 64 CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); 65 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, 66 CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); 67 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, 68 CTLFLAG_RW, &cnt.v_cache_min, 0, ""); 69 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, 70 CTLFLAG_RW, &cnt.v_cache_max, 0, ""); 71 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, 72 CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); 73 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, 74 CTLFLAG_RW, &cnt.v_free_severe, 0, ""); 75 76 static int 77 sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS) 78 { 79 80 #ifdef SCTL_MASK32 81 u_int32_t la[4]; 82 83 if (req->flags & SCTL_MASK32) { 84 la[0] = averunnable.ldavg[0]; 85 la[1] = averunnable.ldavg[1]; 86 la[2] = averunnable.ldavg[2]; 87 la[3] = averunnable.fscale; 88 return SYSCTL_OUT(req, la, sizeof(la)); 89 } else 90 #endif 91 return SYSCTL_OUT(req, &averunnable, sizeof(averunnable)); 92 } 93 SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD | 94 CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg", 95 "Machine loadaverage history"); 96 97 static int 98 vmtotal(SYSCTL_HANDLER_ARGS) 99 { 100 struct proc *p; 101 struct vmtotal total; 102 vm_map_entry_t entry; 103 vm_object_t object; 104 vm_map_t map; 105 int paging; 106 struct thread *td; 107 struct vmspace *vm; 108 109 bzero(&total, sizeof(total)); 110 /* 111 * Mark all objects as inactive. 112 */ 113 mtx_lock(&vm_object_list_mtx); 114 TAILQ_FOREACH(object, &vm_object_list, object_list) { 115 if (!VM_OBJECT_TRYLOCK(object)) { 116 /* 117 * Avoid a lock-order reversal. Consequently, 118 * the reported number of active pages may be 119 * greater than the actual number. 120 */ 121 continue; 122 } 123 vm_object_clear_flag(object, OBJ_ACTIVE); 124 VM_OBJECT_UNLOCK(object); 125 } 126 mtx_unlock(&vm_object_list_mtx); 127 /* 128 * Calculate process statistics. 129 */ 130 sx_slock(&allproc_lock); 131 FOREACH_PROC_IN_SYSTEM(p) { 132 if (p->p_flag & P_SYSTEM) 133 continue; 134 PROC_LOCK(p); 135 switch (p->p_state) { 136 case PRS_NEW: 137 PROC_UNLOCK(p); 138 continue; 139 break; 140 default: 141 FOREACH_THREAD_IN_PROC(p, td) { 142 thread_lock(td); 143 switch (td->td_state) { 144 case TDS_INHIBITED: 145 if (TD_IS_SWAPPED(td)) 146 total.t_sw++; 147 else if (TD_IS_SLEEPING(td) && 148 td->td_priority <= PZERO) 149 total.t_dw++; 150 else 151 total.t_sl++; 152 break; 153 154 case TDS_CAN_RUN: 155 total.t_sw++; 156 break; 157 case TDS_RUNQ: 158 case TDS_RUNNING: 159 total.t_rq++; 160 thread_unlock(td); 161 continue; 162 default: 163 break; 164 } 165 thread_unlock(td); 166 } 167 } 168 PROC_UNLOCK(p); 169 /* 170 * Note active objects. 171 */ 172 paging = 0; 173 vm = vmspace_acquire_ref(p); 174 if (vm == NULL) 175 continue; 176 map = &vm->vm_map; 177 vm_map_lock_read(map); 178 for (entry = map->header.next; 179 entry != &map->header; entry = entry->next) { 180 if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || 181 (object = entry->object.vm_object) == NULL) 182 continue; 183 VM_OBJECT_LOCK(object); 184 vm_object_set_flag(object, OBJ_ACTIVE); 185 paging |= object->paging_in_progress; 186 VM_OBJECT_UNLOCK(object); 187 } 188 vm_map_unlock_read(map); 189 vmspace_free(vm); 190 if (paging) 191 total.t_pw++; 192 } 193 sx_sunlock(&allproc_lock); 194 /* 195 * Calculate object memory usage statistics. 196 */ 197 mtx_lock(&vm_object_list_mtx); 198 TAILQ_FOREACH(object, &vm_object_list, object_list) { 199 /* 200 * Perform unsynchronized reads on the object to avoid 201 * a lock-order reversal. In this case, the lack of 202 * synchronization should not impair the accuracy of 203 * the reported statistics. 204 */ 205 if (object->type == OBJT_DEVICE || object->type == OBJT_SG) { 206 /* 207 * Devices, like /dev/mem, will badly skew our totals. 208 */ 209 continue; 210 } 211 if (object->ref_count == 0) { 212 /* 213 * Also skip unreferenced objects, including 214 * vnodes representing mounted file systems. 215 */ 216 continue; 217 } 218 total.t_vm += object->size; 219 total.t_rm += object->resident_page_count; 220 if (object->flags & OBJ_ACTIVE) { 221 total.t_avm += object->size; 222 total.t_arm += object->resident_page_count; 223 } 224 if (object->shadow_count > 1) { 225 /* shared object */ 226 total.t_vmshr += object->size; 227 total.t_rmshr += object->resident_page_count; 228 if (object->flags & OBJ_ACTIVE) { 229 total.t_avmshr += object->size; 230 total.t_armshr += object->resident_page_count; 231 } 232 } 233 } 234 mtx_unlock(&vm_object_list_mtx); 235 total.t_free = cnt.v_free_count + cnt.v_cache_count; 236 return (sysctl_handle_opaque(oidp, &total, sizeof(total), req)); 237 } 238 239 /* 240 * vcnt() - accumulate statistics from all cpus and the global cnt 241 * structure. 242 * 243 * The vmmeter structure is now per-cpu as well as global. Those 244 * statistics which can be kept on a per-cpu basis (to avoid cache 245 * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining 246 * statistics, such as v_free_reserved, are left in the global 247 * structure. 248 * 249 * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) 250 */ 251 static int 252 vcnt(SYSCTL_HANDLER_ARGS) 253 { 254 int count = *(int *)arg1; 255 int offset = (char *)arg1 - (char *)&cnt; 256 #ifdef SMP 257 int i; 258 259 for (i = 0; i < mp_ncpus; ++i) { 260 struct pcpu *pcpu = pcpu_find(i); 261 count += *(int *)((char *)&pcpu->pc_cnt + offset); 262 } 263 #else 264 count += *(int *)((char *)PCPU_PTR(cnt) + offset); 265 #endif 266 return (SYSCTL_OUT(req, &count, sizeof(int))); 267 } 268 269 SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE, 270 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", 271 "System virtual memory statistics"); 272 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); 273 static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, 274 "VM meter sys stats"); 275 static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, 276 "VM meter vm stats"); 277 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); 278 279 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 280 &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); 281 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 282 &cnt.v_trap, 0, vcnt, "IU", "Traps"); 283 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 284 &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); 285 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 286 &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); 287 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 288 &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); 289 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 290 &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); 291 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 292 &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); 293 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 294 &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); 295 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 296 &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); 297 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 298 &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); 299 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 300 &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); 301 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 302 &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); 303 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 304 &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); 305 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 306 &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); 307 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 308 &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); 309 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 310 &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); 311 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 312 &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); 313 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 314 &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); 315 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 316 &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); 317 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 318 &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); 319 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 320 &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); 321 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 322 &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); 323 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tcached, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 324 &cnt.v_tcached, 0, vcnt, "IU", "Total pages cached"); 325 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 326 &cnt.v_dfree, 0, vcnt, "IU", ""); 327 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 328 &cnt.v_pfree, 0, vcnt, "IU", ""); 329 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 330 &cnt.v_tfree, 0, vcnt, "IU", ""); 331 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 332 &cnt.v_page_size, 0, vcnt, "IU", ""); 333 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 334 &cnt.v_page_count, 0, vcnt, "IU", ""); 335 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 336 &cnt.v_free_reserved, 0, vcnt, "IU", ""); 337 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 338 &cnt.v_free_target, 0, vcnt, "IU", ""); 339 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 340 &cnt.v_free_min, 0, vcnt, "IU", ""); 341 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 342 &cnt.v_free_count, 0, vcnt, "IU", ""); 343 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 344 &cnt.v_wire_count, 0, vcnt, "IU", ""); 345 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 346 &cnt.v_active_count, 0, vcnt, "IU", ""); 347 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 348 &cnt.v_inactive_target, 0, vcnt, "IU", ""); 349 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 350 &cnt.v_inactive_count, 0, vcnt, "IU", ""); 351 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 352 &cnt.v_cache_count, 0, vcnt, "IU", ""); 353 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 354 &cnt.v_cache_min, 0, vcnt, "IU", ""); 355 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 356 &cnt.v_cache_max, 0, vcnt, "IU", ""); 357 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 358 &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); 359 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 360 &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); 361 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 362 &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); 363 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 364 &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); 365 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 366 &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); 367 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 368 &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); 369 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 370 &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); 371 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 372 &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); 373 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 374 &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); 375 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, 376 &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); 377 378 SYSCTL_INT(_vm_stats_misc, OID_AUTO, 379 zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");
Cache object: 315875f7e87e428fc606086f5c43cfea
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