| subr_param.c (242847) | subr_param.c (243631) |
|---|---|
| 1/*- 2 * Copyright (c) 1980, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)param.c 8.3 (Berkeley) 8/20/94 35 */ 36 37#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1980, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)param.c 8.3 (Berkeley) 8/20/94 35 */ 36 37#include <sys/cdefs.h> |
| 38__FBSDID("$FreeBSD: head/sys/kern/subr_param.c 242847 2012-11-10 02:08:40Z alfred $"); | 38__FBSDID("$FreeBSD: head/sys/kern/subr_param.c 243631 2012-11-27 21:19:58Z andre $"); |
| 39 40#include "opt_param.h" 41#include "opt_msgbuf.h" 42#include "opt_maxusers.h" 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/kernel.h> --- 41 unchanged lines hidden (view full) --- 88int maxprocperuid; /* max # of procs per user */ 89int maxfiles; /* sys. wide open files limit */ 90int maxfilesperproc; /* per-proc open files limit */ 91int msgbufsize; /* size of kernel message buffer */ 92int ncallout; /* maximum # of timer events */ 93int nbuf; 94int ngroups_max; /* max # groups per process */ 95int nswbuf; | 39 40#include "opt_param.h" 41#include "opt_msgbuf.h" 42#include "opt_maxusers.h" 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/kernel.h> --- 41 unchanged lines hidden (view full) --- 88int maxprocperuid; /* max # of procs per user */ 89int maxfiles; /* sys. wide open files limit */ 90int maxfilesperproc; /* per-proc open files limit */ 91int msgbufsize; /* size of kernel message buffer */ 92int ncallout; /* maximum # of timer events */ 93int nbuf; 94int ngroups_max; /* max # groups per process */ 95int nswbuf; |
| 96long maxmbufmem; /* max mbuf memory */ |
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| 96pid_t pid_max = PID_MAX; 97long maxswzone; /* max swmeta KVA storage */ 98long maxbcache; /* max buffer cache KVA storage */ 99long maxpipekva; /* Limit on pipe KVA */ 100int vm_guest; /* Running as virtual machine guest? */ 101u_long maxtsiz; /* max text size */ 102u_long dfldsiz; /* initial data size limit */ 103u_long maxdsiz; /* max data size */ --- 161 unchanged lines hidden (view full) --- 265} 266 267/* 268 * Boot time overrides that are scaled against main memory 269 */ 270void 271init_param2(long physpages) 272{ | 97pid_t pid_max = PID_MAX; 98long maxswzone; /* max swmeta KVA storage */ 99long maxbcache; /* max buffer cache KVA storage */ 100long maxpipekva; /* Limit on pipe KVA */ 101int vm_guest; /* Running as virtual machine guest? */ 102u_long maxtsiz; /* max text size */ 103u_long dfldsiz; /* initial data size limit */ 104u_long maxdsiz; /* max data size */ --- 161 unchanged lines hidden (view full) --- 266} 267 268/* 269 * Boot time overrides that are scaled against main memory 270 */ 271void 272init_param2(long physpages) 273{ |
| 274 long realmem; |
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| 273 274 /* Base parameters */ 275 maxusers = MAXUSERS; 276 TUNABLE_INT_FETCH("kern.maxusers", &maxusers); 277 if (maxusers == 0) { 278 maxusers = physpages / (2 * 1024 * 1024 / PAGE_SIZE); 279 if (maxusers < 32) 280 maxusers = 32; --- 7 unchanged lines hidden (view full) --- 288 */ 289 if (maxusers > 384) 290 maxusers = 384 + ((maxusers - 384) / 8); 291 } 292 293 /* 294 * The following can be overridden after boot via sysctl. Note: 295 * unless overriden, these macros are ultimately based on maxusers. | 275 276 /* Base parameters */ 277 maxusers = MAXUSERS; 278 TUNABLE_INT_FETCH("kern.maxusers", &maxusers); 279 if (maxusers == 0) { 280 maxusers = physpages / (2 * 1024 * 1024 / PAGE_SIZE); 281 if (maxusers < 32) 282 maxusers = 32; --- 7 unchanged lines hidden (view full) --- 290 */ 291 if (maxusers > 384) 292 maxusers = 384 + ((maxusers - 384) / 8); 293 } 294 295 /* 296 * The following can be overridden after boot via sysctl. Note: 297 * unless overriden, these macros are ultimately based on maxusers. |
| 296 */ 297 maxproc = NPROC; 298 TUNABLE_INT_FETCH("kern.maxproc", &maxproc); 299 /* | |
| 300 * Limit maxproc so that kmap entries cannot be exhausted by 301 * processes. 302 */ | 298 * Limit maxproc so that kmap entries cannot be exhausted by 299 * processes. 300 */ |
| 301 maxproc = NPROC; 302 TUNABLE_INT_FETCH("kern.maxproc", &maxproc); |
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| 303 if (maxproc > (physpages / 12)) 304 maxproc = physpages / 12; | 303 if (maxproc > (physpages / 12)) 304 maxproc = physpages / 12; |
| 305 maxfiles = MAXFILES; 306 TUNABLE_INT_FETCH("kern.maxfiles", &maxfiles); | |
| 307 maxprocperuid = (maxproc * 9) / 10; | 305 maxprocperuid = (maxproc * 9) / 10; |
| 308 maxfilesperproc = (maxfiles * 9) / 10; | 306 307 /* 308 * The default limit for maxfiles is 1/12 of the number of 309 * physical page but not less than 16 times maxusers. 310 * At most it can be 1/6 the number of physical pages. 311 */ 312 maxfiles = imax(MAXFILES, physpages / 8); 313 TUNABLE_INT_FETCH("kern.maxfiles", &maxfiles); 314 if (maxfiles > (physpages / 4)) 315 maxfiles = physpages / 4; 316 maxfilesperproc = (maxfiles / 10) * 9; |
| 309 310 /* 311 * Cannot be changed after boot. 312 */ 313 nbuf = NBUF; 314 TUNABLE_INT_FETCH("kern.nbuf", &nbuf); 315 | 317 318 /* 319 * Cannot be changed after boot. 320 */ 321 nbuf = NBUF; 322 TUNABLE_INT_FETCH("kern.nbuf", &nbuf); 323 |
| 324 /* 325 * XXX: Does the callout wheel have to be so big? 326 */ |
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| 316 ncallout = 16 + maxproc + maxfiles; 317 TUNABLE_INT_FETCH("kern.ncallout", &ncallout); 318 319 /* | 327 ncallout = 16 + maxproc + maxfiles; 328 TUNABLE_INT_FETCH("kern.ncallout", &ncallout); 329 330 /* |
| 331 * The default limit for all mbuf related memory is 1/2 of all 332 * available kernel memory (physical or kmem). 333 * At most it can be 3/4 of available kernel memory. 334 */ 335 realmem = lmin(physpages * PAGE_SIZE, 336 VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS); 337 maxmbufmem = realmem / 2; 338 TUNABLE_LONG_FETCH("kern.maxmbufmem", &maxmbufmem); 339 if (maxmbufmem > (realmem / 4) * 3) 340 maxmbufmem = (realmem / 4) * 3; 341 342 /* |
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| 320 * The default for maxpipekva is min(1/64 of the kernel address space, 321 * max(1/64 of main memory, 512KB)). See sys_pipe.c for more details. 322 */ 323 maxpipekva = (physpages / 64) * PAGE_SIZE; | 343 * The default for maxpipekva is min(1/64 of the kernel address space, 344 * max(1/64 of main memory, 512KB)). See sys_pipe.c for more details. 345 */ 346 maxpipekva = (physpages / 64) * PAGE_SIZE; |
| 347 TUNABLE_LONG_FETCH("kern.ipc.maxpipekva", &maxpipekva); |
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| 324 if (maxpipekva < 512 * 1024) 325 maxpipekva = 512 * 1024; 326 if (maxpipekva > (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 64) 327 maxpipekva = (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 328 64; | 348 if (maxpipekva < 512 * 1024) 349 maxpipekva = 512 * 1024; 350 if (maxpipekva > (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 64) 351 maxpipekva = (VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS) / 352 64; |
| 329 TUNABLE_LONG_FETCH("kern.ipc.maxpipekva", &maxpipekva); | |
| 330} 331 332/* 333 * Sysctl stringiying handler for kern.vm_guest. 334 */ 335static int 336sysctl_kern_vm_guest(SYSCTL_HANDLER_ARGS) 337{ 338 return (SYSCTL_OUT(req, vm_guest_sysctl_names[vm_guest], 339 strlen(vm_guest_sysctl_names[vm_guest]))); 340} | 353} 354 355/* 356 * Sysctl stringiying handler for kern.vm_guest. 357 */ 358static int 359sysctl_kern_vm_guest(SYSCTL_HANDLER_ARGS) 360{ 361 return (SYSCTL_OUT(req, vm_guest_sysctl_names[vm_guest], 362 strlen(vm_guest_sysctl_names[vm_guest]))); 363} |