1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 1983, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #include <sys/types.h> 26 #include <sys/time.h> 27 #include <sys/param.h> 28 #include <sys/systm.h> 29 #include <sys/signal.h> 30 #include <sys/sysmacros.h> 31 #include <sys/cmn_err.h> 32 #include <sys/user.h> 33 #include <sys/proc.h> 34 #include <sys/task.h> 35 #include <sys/project.h> 36 #include <sys/klwp.h> 37 #include <sys/vnode.h> 38 #include <sys/file.h> 39 #include <sys/fcntl.h> 40 #include <sys/flock.h> 41 #include <sys/var.h> 42 #include <sys/stream.h> 43 #include <sys/strsubr.h> 44 #include <sys/conf.h> 45 #include <sys/class.h> 46 #include <sys/ts.h> 47 #include <sys/rt.h> 48 #include <sys/exec.h> 49 #include <sys/exechdr.h> 50 #include <sys/buf.h> 51 #include <sys/resource.h> 52 #include <vm/seg.h> 53 #include <vm/pvn.h> 54 #include <vm/seg_kmem.h> 55 #include <sys/vmparam.h> 56 #include <sys/machparam.h> 57 #include <sys/utsname.h> 58 #include <sys/kmem.h> 59 #include <sys/stack.h> 60 #include <sys/modctl.h> 61 #include <sys/fdbuffer.h> 62 #include <sys/cyclic_impl.h> 63 #include <sys/disp.h> 64 #include <sys/tuneable.h> 65 #include <sys/systeminfo.h> 66 67 #include <sys/vmem.h> 68 #include <sys/clock.h> 69 #include <sys/clock_impl.h> 70 #include <sys/serializer.h> 71 72 /* 73 * The following few lines describe generic things that must be compiled 74 * into the booted executable (unix) rather than genunix or any other 75 * module because they're required by crash dump readers, etc. 76 */ 77 struct modctl modules; /* head of linked list of modules */ 78 char *default_path; /* default module loading path */ 79 struct swapinfo *swapinfo; /* protected by the swapinfo_lock */ 80 proc_t *practive; /* active process list */ 81 uint_t nproc; /* current number of processes */ 82 proc_t p0; /* process 0 */ 83 struct plock p0lock; /* p0's p_lock */ 84 klwp_t lwp0; /* t0's lwp */ 85 task_t *task0p; /* task 0 */ 86 kproject_t *proj0p; /* location of project 0 */ 87 88 /* 89 * The following are "implementation architecture" dependent constants made 90 * available here in the form of initialized data for use by "implementation 91 * architecture" independent modules. See machparam.h. 92 */ 93 const unsigned long _pagesize = (unsigned long)PAGESIZE; 94 const unsigned int _pageshift = (unsigned int)PAGESHIFT; 95 const unsigned long _pageoffset = (unsigned long)PAGEOFFSET; 96 /* 97 * XXX - This value pagemask has to be a 64bit size because 98 * large file support uses this mask on offsets which are 64 bit size. 99 * using unsigned leaves the higher 32 bits value as zero thus 100 * corrupting offset calculations in the file system and VM. 101 */ 102 const u_longlong_t _pagemask = (u_longlong_t)PAGEMASK; 103 const unsigned long _mmu_pagesize = (unsigned long)MMU_PAGESIZE; 104 const unsigned int _mmu_pageshift = (unsigned int)MMU_PAGESHIFT; 105 const unsigned long _mmu_pageoffset = (unsigned long)MMU_PAGEOFFSET; 106 const unsigned long _mmu_pagemask = (unsigned long)MMU_PAGEMASK; 107 uintptr_t _kernelbase = (uintptr_t)KERNELBASE; 108 uintptr_t _userlimit = (uintptr_t)USERLIMIT; 109 uintptr_t _userlimit32 = (uintptr_t)USERLIMIT32; 110 const uintptr_t _argsbase = (uintptr_t)ARGSBASE; 111 const unsigned int _diskrpm = (unsigned int)DISKRPM; 112 const unsigned long _pgthresh = (unsigned long)PGTHRESH; 113 const unsigned int _maxslp = (unsigned int)MAXSLP; 114 const unsigned long _maxhandspreadpages = (unsigned long)MAXHANDSPREADPAGES; 115 const int _ncpu = (int)NCPU; 116 const int _ncpu_log2 = (int)NCPU_LOG2; 117 const int _ncpu_p2 = (int)NCPU_P2; 118 const unsigned long _defaultstksz = (unsigned long)DEFAULTSTKSZ; 119 const unsigned int _nbpg = (unsigned int)MMU_PAGESIZE; 120 121 /* 122 * System parameter formulae. 123 * 124 * This file is copied into each directory where we compile 125 * the kernel; it should be modified there to suit local taste 126 * if necessary. 127 */ 128 129 /* 130 * Default hz is 100, but if we set hires_tick we get higher resolution 131 * clock behavior (currently defined to be 1000 hz). Higher values seem 132 * to work, but are not supported. 133 * 134 * If we do decide to play with higher values, remember that hz should 135 * satisfy the following constraints to avoid integer round-off problems: 136 * 137 * (1) hz should be in the range 100 <= hz <= MICROSEC. If hz exceeds 138 * MICROSEC, usec_per_tick will be zero and lots of stuff will break. 139 * Similarly, if hz < 100 then hz / 100 == 0 and stuff will break. 140 * 141 * (2) If hz <= 1000, it should be both a multiple of 100 and a 142 * divisor of 1000. 143 * 144 * (3) If hz > 1000, it should be both a multiple of 1000 and a 145 * divisor of MICROSEC. 146 * 147 * Thus the only reasonable values of hz (i.e. the values that won't 148 * cause roundoff error) are: 100, 200, 500, 1000, 2000, 4000, 5000, 149 * 8000, 10000, 20000, 25000, 40000, 50000, 100000, 125000, 200000, 150 * 250000, 500000, 1000000. As of this writing (1996) a clock rate 151 * of more than about 10 kHz seems utterly ridiculous, although 152 * this observation will no doubt seem quaintly amusing one day. 153 */ 154 #define HIRES_HZ_DEFAULT 1000 155 156 int hz = HZ_DEFAULT; 157 int hires_hz = HIRES_HZ_DEFAULT; 158 159 int hires_tick = 0; 160 int cpu_decay_factor = 10; /* this is no longer tied to clock */ 161 int max_hres_adj; /* maximum adjustment of hrtime per tick */ 162 int tick_per_msec; /* clock ticks per millisecond (zero if hz < 1000) */ 163 164 /* 165 * Milliseconds, Microseconds, and Nanoseconds per clock tick 166 * 167 * Note: 168 * msec_per_tick is zero if hz > 1000 169 */ 170 int msec_per_tick; 171 int usec_per_tick; 172 int nsec_per_tick; 173 174 /* 175 * Time Resolution values. These are defined in condvar.h and initialized in 176 * param_init(). Consumers of cv_reltimedwait() and cv_reltimedwait_sig() 177 * need to specify how accurate the timeout argument should be through 178 * one of these values. The intention is to allow the underlying implementation 179 * to anticipate or defer the expiration of timeouts, preventing unnecessary 180 * wakeups by batch processing similarly expiring events. 181 */ 182 time_res_t time_res[TR_COUNT]; 183 184 /* 185 * Setting "snooping" to a non-zero value will cause a deadman panic if 186 * snoop_interval microseconds elapse without lbolt increasing. The default 187 * snoop_interval is 50 seconds. 188 */ 189 #define SNOOP_INTERVAL_MIN (MICROSEC) 190 #define SNOOP_INTERVAL_DEFAULT (50 * MICROSEC) 191 192 int snooping = 0; 193 uint_t snoop_interval = SNOOP_INTERVAL_DEFAULT; 194 195 /* 196 * Tables of initialization functions, called from main(). 197 */ 198 199 extern void system_taskq_init(void); 200 extern void binit(void); 201 extern void space_init(void); 202 extern void dnlc_init(void); 203 extern void vfsinit(void); 204 extern void finit(void); 205 extern void strinit(void); 206 extern void flk_init(void); 207 extern void ftrace_init(void); 208 extern void softcall_init(void); 209 extern void ttyinit(void); 210 extern void schedctl_init(void); 211 extern void deadman_init(void); 212 extern void clock_timer_init(void); 213 extern void clock_realtime_init(void); 214 extern void clock_highres_init(void); 215 extern void clock_tick_mp_init(void); 216 extern void cu_init(void); 217 extern void callout_mp_init(void); 218 extern void cpu_seq_tbl_init(void); 219 220 void (*init_tbl[])(void) = { 221 system_taskq_init, 222 binit, 223 space_init, 224 dnlc_init, 225 vfsinit, 226 finit, 227 strinit, 228 serializer_init, 229 softcall_init, 230 ttyinit, 231 as_init, 232 pvn_init, 233 anon_init, 234 segvn_init, 235 flk_init, 236 cpu_seq_tbl_init, 237 schedctl_init, 238 fdb_init, 239 deadman_init, 240 clock_timer_init, 241 clock_realtime_init, 242 clock_highres_init, 243 0 244 }; 245 246 247 #if defined(__sparc) 248 extern void siron_mp_init(); 249 #endif 250 251 /* 252 * Any per cpu resources should be initialized via 253 * an entry in mp_init_tbl(). 254 */ 255 void (*mp_init_tbl[])(void) = { 256 ftrace_init, 257 cyclic_mp_init, 258 #if defined(__sparc) 259 siron_mp_init, 260 #endif 261 clock_tick_mp_init, 262 cu_init, 263 callout_mp_init, 264 0 265 }; 266 267 int maxusers; /* kitchen-sink knob for dynamic configuration */ 268 269 /* 270 * pidmax -- highest pid value assigned by the system 271 * Settable in /etc/system 272 */ 273 int pidmax = DEFAULT_MAXPID; 274 275 /* 276 * jump_pid - if set, this value is where pid numbers should start 277 * after the first few system pids (0-3) are used. If 0, pids are 278 * chosen in the usual way. This variable can be used to quickly 279 * create large pids (by setting it to 100000, for example). pids 280 * less than this value will never be chosen. 281 */ 282 pid_t jump_pid = DEFAULT_JUMPPID; 283 284 /* 285 * autoup -- used in struct var for dynamic config of the age a delayed-write 286 * buffer must be in seconds before bdflush will write it out. 287 */ 288 #define DEFAULT_AUTOUP 30 289 int autoup = DEFAULT_AUTOUP; 290 291 /* 292 * bufhwm -- tuneable variable for struct var for v_bufhwm. 293 * high water mark for buffer cache mem usage in units of K bytes. 294 * 295 * bufhwm_pct -- ditto, but given in % of physmem. 296 */ 297 int bufhwm = 0; 298 int bufhwm_pct = 0; 299 300 /* 301 * Process table. 302 */ 303 int maxpid; 304 int max_nprocs; /* set in param_init() */ 305 int maxuprc; /* set in param_init() */ 306 int reserved_procs; 307 int nthread = 1; 308 309 /* 310 * UFS tunables 311 */ 312 int ufs_ninode; /* declared here due to backwards compatibility */ 313 int ndquot; /* declared here due to backwards compatibility */ 314 315 /* 316 * Exec switch table. This is used by the generic exec module 317 * to switch out to the desired executable type, based on the 318 * magic number. The currently supported types are ELF, a.out 319 * (both NMAGIC and ZMAGIC), interpreter (#!) files, 320 * and Java executables. 321 */ 322 /* 323 * Magic numbers 324 */ 325 short elfmagic = 0x7f45; 326 short intpmagic = 0x2321; 327 short jmagic = 0x504b; 328 329 #if defined(__sparc) 330 short aout_nmagic = NMAGIC; 331 short aout_zmagic = ZMAGIC; 332 short aout_omagic = OMAGIC; 333 #endif 334 short nomagic = 0; 335 336 /* 337 * Magic strings 338 */ 339 #define ELF32MAGIC_STRING "\x7f""ELF\x1" 340 #define ELF64MAGIC_STRING "\x7f""ELF\x2" 341 #define INTPMAGIC_STRING "#!" 342 #define JAVAMAGIC_STRING "PK\003\004" 343 #define AOUT_OMAGIC_STRING "\x1""\x07" /* 0407 */ 344 #define AOUT_NMAGIC_STRING "\x1""\x08" /* 0410 */ 345 #define AOUT_ZMAGIC_STRING "\x1""\x0b" /* 0413 */ 346 #define NOMAGIC_STRING "" 347 348 #define SHBIN_CNTL(x) ((x)&037) 349 #define SHBINMAGIC_STRING {SHBIN_CNTL('k'), SHBIN_CNTL('s'), SHBIN_CNTL('h'), 0} 350 #define SHBINMAGIC_LEN 4 351 352 char elf32magicstr[] = ELF32MAGIC_STRING; 353 char elf64magicstr[] = ELF64MAGIC_STRING; 354 char intpmagicstr[] = INTPMAGIC_STRING; 355 char shbinmagicstr[] = SHBINMAGIC_STRING; 356 char javamagicstr[] = JAVAMAGIC_STRING; 357 #if defined(__sparc) 358 char aout_nmagicstr[] = AOUT_NMAGIC_STRING; 359 char aout_zmagicstr[] = AOUT_ZMAGIC_STRING; 360 char aout_omagicstr[] = AOUT_OMAGIC_STRING; 361 #endif 362 char nomagicstr[] = NOMAGIC_STRING; 363 364 char *execswnames[] = { 365 "elfexec", /* Elf32 */ 366 #ifdef _LP64 367 "elfexec", /* Elf64 */ 368 #endif 369 "intpexec", 370 "shbinexec", 371 "javaexec", 372 #if defined(__sparc) 373 "aoutexec", 374 "aoutexec", 375 "aoutexec", 376 #endif 377 NULL, 378 NULL, 379 NULL 380 }; 381 382 struct execsw execsw[] = { 383 { elf32magicstr, 0, 5, NULL, NULL, NULL }, 384 #ifdef _LP64 385 { elf64magicstr, 0, 5, NULL, NULL, NULL }, 386 #endif 387 { intpmagicstr, 0, 2, NULL, NULL, NULL }, 388 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL }, 389 { javamagicstr, 0, 4, NULL, NULL, NULL }, 390 #if defined(__sparc) 391 { aout_zmagicstr, 2, 2, NULL, NULL, NULL }, 392 { aout_nmagicstr, 2, 2, NULL, NULL, NULL }, 393 { aout_omagicstr, 2, 2, NULL, NULL, NULL }, 394 #endif 395 { nomagicstr, 0, 0, NULL, NULL, NULL }, 396 { nomagicstr, 0, 0, NULL, NULL, NULL }, 397 { nomagicstr, 0, 0, NULL, NULL, NULL }, 398 { nomagicstr, 0, 0, NULL, NULL, NULL } 399 }; 400 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */ 401 kmutex_t execsw_lock; /* Used for allocation of execsw entries */ 402 403 /* 404 * symbols added to make changing max-file-descriptors 405 * simple via /etc/system 406 */ 407 #define RLIM_FD_CUR 0x100 408 #define RLIM_FD_MAX 0x10000 409 410 uint_t rlim_fd_cur = RLIM_FD_CUR; 411 uint_t rlim_fd_max = RLIM_FD_MAX; 412 413 /* 414 * (Default resource limits were formerly declared here, but are now provided by 415 * the more general resource controls framework.) 416 */ 417 418 /* 419 * STREAMS tunables 420 */ 421 int nstrpush = 9; /* maximum # of modules/drivers on a stream */ 422 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */ 423 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */ 424 /* for `strmsgsz', zero means unlimited */ 425 /* 426 * Filesystem tunables 427 */ 428 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */ 429 int ngroups_max = NGROUPS_MAX_DEFAULT; 430 431 /* 432 * generic scheduling stuff 433 * 434 * Configurable parameters for RT and TS are in the respective 435 * scheduling class modules. 436 */ 437 438 pri_t maxclsyspri = MAXCLSYSPRI; 439 pri_t minclsyspri = MINCLSYSPRI; 440 char sys_name[] = "SYS"; 441 442 extern pri_t sys_init(); 443 extern classfuncs_t sys_classfuncs; 444 445 sclass_t sclass[] = { 446 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 0 }, 447 { "", NULL, NULL, NULL, 0 }, 448 { "", NULL, NULL, NULL, 0 }, 449 { "", NULL, NULL, NULL, 0 }, 450 { "", NULL, NULL, NULL, 0 }, 451 { "", NULL, NULL, NULL, 0 }, 452 { "", NULL, NULL, NULL, 0 }, 453 { "", NULL, NULL, NULL, 0 }, 454 { "", NULL, NULL, NULL, 0 }, 455 { "", NULL, NULL, NULL, 0 } 456 }; 457 458 int loaded_classes = 1; /* for loaded classes */ 459 kmutex_t class_lock; /* lock for class[] */ 460 461 int nclass = sizeof (sclass) / sizeof (sclass_t); 462 char initcls[] = "TS"; 463 char *defaultclass = initcls; 464 465 /* 466 * Tunable system parameters. 467 */ 468 469 /* 470 * The integers tune_* are done this way so that the tune 471 * data structure may be "tuned" if necessary from the /etc/system 472 * file. The tune data structure is initialized in param_init(); 473 */ 474 475 tune_t tune; 476 477 /* 478 * If freemem < t_getpgslow, then start to steal pages from processes. 479 */ 480 int tune_t_gpgslo = 25; 481 482 /* 483 * Rate at which fsflush is run, in seconds. 484 */ 485 #define DEFAULT_TUNE_T_FSFLUSHR 1 486 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 487 488 /* 489 * The minimum available resident (not swappable) memory to maintain 490 * in order to avoid deadlock. In pages. 491 */ 492 int tune_t_minarmem = 25; 493 494 /* 495 * The minimum available swappable memory to maintain in order to avoid 496 * deadlock. In pages. 497 */ 498 int tune_t_minasmem = 25; 499 500 int tune_t_flckrec = 512; /* max # of active frlocks */ 501 502 /* 503 * Number of currently available pages that cannot be 'locked' 504 * This is set in init_pages_pp_maximum, and must be initialized 505 * to zero here to detect an override in /etc/system 506 */ 507 pgcnt_t pages_pp_maximum = 0; 508 509 int boothowto; /* boot flags passed to kernel */ 510 struct var v; /* System Configuration Information */ 511 512 /* 513 * System Configuration Information 514 */ 515 516 /* 517 * The physical system's host identifier, expressed as a decimal string. 518 * Code should only directly access this value when writing to it (setting the 519 * physical system's host identifier). Code that reads the physical system's 520 * host identifier should use zone_get_hostid(NULL) instead. 521 */ 522 char hw_serial[HW_HOSTID_LEN] = "0"; 523 524 #if defined(__sparc) 525 526 /* 527 * On sparc machines, read hw_serial from the firmware at boot time 528 * and simply assert Oracle is the hardware provider. 529 */ 530 char architecture[] = "sparcv9"; 531 char architecture_32[] = "sparc"; 532 char hw_provider[] = "Oracle Corporation"; 533 534 #elif defined(__i386) 535 536 /* 537 * On x86 machines, read hw_serial, hw_provider and srpc_domain from 538 * /etc/bootrc at boot time. 539 */ 540 char architecture[] = "i386"; 541 char architecture_32[] = "i386"; 542 char hw_provider[SYS_NMLN] = ""; 543 544 #elif defined(__amd64) 545 546 /* 547 * On amd64 machines, read hw_serial, hw_provider and srpc_domain from 548 * /etc/bootrc at boot time. 549 */ 550 char architecture[] = "amd64"; 551 char architecture_32[] = "i386"; 552 char hw_provider[SYS_NMLN] = ""; 553 554 #else 555 #error "unknown processor architecture" 556 #endif 557 558 char srpc_domain[SYS_NMLN] = ""; 559 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */ 560 561 /* Initialize isa_list */ 562 char *isa_list = architecture; 563 564 static pgcnt_t original_physmem = 0; 565 566 #define MIN_DEFAULT_MAXUSERS 8u 567 #define MAX_DEFAULT_MAXUSERS 2048u 568 #define MAX_MAXUSERS 4096u 569 570 void 571 param_preset(void) 572 { 573 original_physmem = physmem; 574 } 575 576 void 577 param_calc(int platform_max_nprocs) 578 { 579 /* 580 * Default to about one "user" per megabyte, taking into 581 * account both physical and virtual constraints. 582 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT) 583 * converts pages to megs without integer overflow. 584 */ 585 #if defined(__sparc) 586 if (physmem > original_physmem) { 587 physmem = original_physmem; 588 cmn_err(CE_NOTE, "physmem limited to %ld", physmem); 589 } 590 #endif 591 if (maxusers == 0) { 592 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT); 593 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20; 594 maxusers = MIN(MAX(MIN(physmegs, virtmegs), 595 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS); 596 } 597 if (maxusers > MAX_MAXUSERS) { 598 maxusers = MAX_MAXUSERS; 599 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS); 600 } 601 602 if (ngroups_max > NGROUPS_MAX_DEFAULT) 603 cmn_err(CE_WARN, "ngroups_max of %d > %d, NFS AUTH_SYS will" 604 " not work properly", ngroups_max, NGROUPS_MAX_DEFAULT); 605 606 #ifdef DEBUG 607 /* 608 * The purpose of maxusers is to prevent memory overcommit. 609 * DEBUG kernels take more space, so reduce maxusers a bit. 610 */ 611 maxusers = (3 * maxusers) / 4; 612 #endif 613 614 /* 615 * We need to dynamically change any variables now so that 616 * the setting of maxusers and pidmax propagate to the other 617 * variables that are dependent on them. 618 */ 619 if (reserved_procs == 0) 620 reserved_procs = 5; 621 if (pidmax < reserved_procs || pidmax > MAX_MAXPID) 622 maxpid = MAX_MAXPID; 623 else 624 maxpid = pidmax; 625 626 /* 627 * This allows platform-dependent code to constrain the maximum 628 * number of processes allowed in case there are e.g. VM limitations 629 * with how many contexts are available. 630 */ 631 if (max_nprocs == 0) 632 max_nprocs = (10 + 16 * maxusers); 633 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs) 634 max_nprocs = platform_max_nprocs; 635 if (max_nprocs > maxpid) 636 max_nprocs = maxpid; 637 638 if (maxuprc == 0) 639 maxuprc = (max_nprocs - reserved_procs); 640 } 641 642 void 643 param_init(void) 644 { 645 /* 646 * Set each individual element of struct var v to be the 647 * default value. This is done this way 648 * so that a user can set the assigned integer value in the 649 * /etc/system file *IF* tuning is needed. 650 */ 651 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */ 652 v.v_maxupttl = max_nprocs - reserved_procs; 653 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */ 654 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */ 655 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */ 656 657 /* 658 * Set each individual element of struct tune to be the 659 * default value. Each struct element This is done this way 660 * so that a user can set the assigned integer value in the 661 * /etc/system file *IF* tuning is needed. 662 */ 663 tune.t_gpgslo = tune_t_gpgslo; 664 tune.t_fsflushr = tune_t_fsflushr; 665 tune.t_minarmem = tune_t_minarmem; 666 tune.t_minasmem = tune_t_minasmem; 667 tune.t_flckrec = tune_t_flckrec; 668 669 /* 670 * Initialization for file descriptors to correct mistaken settings in 671 * /etc/system. Initialization of limits performed by resource control 672 * system. 673 */ 674 if (rlim_fd_cur > rlim_fd_max) 675 rlim_fd_cur = rlim_fd_max; 676 677 /* 678 * calculations needed if hz was set in /etc/system 679 */ 680 if (hires_tick) 681 hz = hires_hz; 682 683 tick_per_msec = hz / MILLISEC; 684 msec_per_tick = MILLISEC / hz; 685 usec_per_tick = MICROSEC / hz; 686 nsec_per_tick = NANOSEC / hz; 687 max_hres_adj = nsec_per_tick >> ADJ_SHIFT; 688 689 /* 690 * Consumers of relative timedwait functions must specify how accurately 691 * the given timeout must expire. This is currently TR_CLOCK_TICK for 692 * the vast majority of consumers, but nsec_per_tick becomes an 693 * artificial value in a tickless world. Each caller of such routines 694 * should re-evaluate their usage and specify the appropriate 695 * resolution. 696 */ 697 time_res[TR_NANOSEC] = SEC; 698 time_res[TR_MICROSEC] = MILLISEC; 699 time_res[TR_MILLISEC] = MICROSEC; 700 time_res[TR_SEC] = NANOSEC; 701 time_res[TR_CLOCK_TICK] = nsec_per_tick; 702 } 703 704 /* 705 * Validate tuneable parameters following /etc/system processing, 706 * but prior to param_init(). 707 */ 708 void 709 param_check(void) 710 { 711 #if defined(__x86) 712 if (physmem != original_physmem) { 713 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx" 714 " via /etc/system. Please use eeprom(1M) instead.", 715 physmem); 716 physmem = original_physmem; 717 } 718 #endif 719 if (ngroups_max < NGROUPS_UMIN) 720 ngroups_max = NGROUPS_UMIN; 721 if (ngroups_max > NGROUPS_UMAX) 722 ngroups_max = NGROUPS_UMAX; 723 724 /* If we have many groups then the ucred proto message also grows. */ 725 if (ngroups_max > NGROUPS_OLDMAX && 726 strctlsz < (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 1024) { 727 strctlsz = (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 728 1024; 729 } 730 731 if (autoup <= 0) { 732 autoup = DEFAULT_AUTOUP; 733 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup); 734 } 735 736 if (tune_t_fsflushr <= 0) { 737 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 738 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d", 739 tune_t_fsflushr); 740 } 741 742 if (jump_pid < 0 || jump_pid >= pidmax) { 743 jump_pid = 0; 744 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored"); 745 } 746 747 if (snoop_interval < SNOOP_INTERVAL_MIN) { 748 snoop_interval = SNOOP_INTERVAL_DEFAULT; 749 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting" 750 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT); 751 } 752 } 753