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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/time.h> 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/signal.h> 31 #include <sys/sysmacros.h> 32 #include <sys/cmn_err.h> 33 #include <sys/user.h> 34 #include <sys/proc.h> 35 #include <sys/task.h> 36 #include <sys/project.h> 37 #include <sys/klwp.h> 38 #include <sys/vnode.h> 39 #include <sys/file.h> 40 #include <sys/fcntl.h> 41 #include <sys/flock.h> 42 #include <sys/var.h> 43 #include <sys/stream.h> 44 #include <sys/strsubr.h> 45 #include <sys/conf.h> 46 #include <sys/class.h> 47 #include <sys/ts.h> 48 #include <sys/rt.h> 49 #include <sys/exec.h> 50 #include <sys/exechdr.h> 51 #include <sys/buf.h> 52 #include <sys/resource.h> 53 #include <vm/seg.h> 54 #include <vm/pvn.h> 55 #include <vm/seg_kmem.h> 56 #include <sys/vmparam.h> 57 #include <sys/machparam.h> 58 #include <sys/utsname.h> 59 #include <sys/kmem.h> 60 #include <sys/stack.h> 61 #include <sys/modctl.h> 62 #include <sys/fdbuffer.h> 63 #include <sys/cyclic_impl.h> 64 #include <sys/disp.h> 65 #include <sys/tuneable.h> 66 #include <sys/systeminfo.h> 67 68 #include <sys/vmem.h> 69 #include <sys/clock.h> 70 #include <sys/clock_impl.h> 71 #include <sys/serializer.h> 72 73 /* 74 * The following few lines describe generic things that must be compiled 75 * into the booted executable (unix) rather than genunix or any other 76 * module because they're required by crash dump readers, etc. 77 */ 78 struct modctl modules; /* head of linked list of modules */ 79 char *default_path; /* default module loading path */ 80 struct swapinfo *swapinfo; /* protected by the swapinfo_lock */ 81 proc_t *practive; /* active process list */ 82 uint_t nproc; /* current number of processes */ 83 proc_t p0; /* process 0 */ 84 struct plock p0lock; /* p0's p_lock */ 85 klwp_t lwp0; /* t0's lwp */ 86 task_t *task0p; /* task 0 */ 87 kproject_t *proj0p; /* location of project 0 */ 88 89 /* 90 * The following are "implementation architecture" dependent constants made 91 * available here in the form of initialized data for use by "implementation 92 * architecture" independent modules. See machparam.h. 93 */ 94 const unsigned long _pagesize = (unsigned long)PAGESIZE; 95 const unsigned int _pageshift = (unsigned int)PAGESHIFT; 96 const unsigned long _pageoffset = (unsigned long)PAGEOFFSET; 97 /* 98 * XXX - This value pagemask has to be a 64bit size because 99 * large file support uses this mask on offsets which are 64 bit size. 100 * using unsigned leaves the higher 32 bits value as zero thus 101 * corrupting offset calculations in the file system and VM. 102 */ 103 const u_longlong_t _pagemask = (u_longlong_t)PAGEMASK; 104 const unsigned long _mmu_pagesize = (unsigned long)MMU_PAGESIZE; 105 const unsigned int _mmu_pageshift = (unsigned int)MMU_PAGESHIFT; 106 const unsigned long _mmu_pageoffset = (unsigned long)MMU_PAGEOFFSET; 107 const unsigned long _mmu_pagemask = (unsigned long)MMU_PAGEMASK; 108 uintptr_t _kernelbase = (uintptr_t)KERNELBASE; 109 uintptr_t _userlimit = (uintptr_t)USERLIMIT; 110 uintptr_t _userlimit32 = (uintptr_t)USERLIMIT32; 111 const uintptr_t _argsbase = (uintptr_t)ARGSBASE; 112 const unsigned int _diskrpm = (unsigned int)DISKRPM; 113 const unsigned long _pgthresh = (unsigned long)PGTHRESH; 114 const unsigned int _maxslp = (unsigned int)MAXSLP; 115 const unsigned long _maxhandspreadpages = (unsigned long)MAXHANDSPREADPAGES; 116 const int _ncpu = (int)NCPU; 117 const unsigned long _defaultstksz = (unsigned long)DEFAULTSTKSZ; 118 const unsigned int _nbpg = (unsigned int)MMU_PAGESIZE; 119 120 /* 121 * System parameter formulae. 122 * 123 * This file is copied into each directory where we compile 124 * the kernel; it should be modified there to suit local taste 125 * if necessary. 126 */ 127 128 /* 129 * Default hz is 100, but if we set hires_tick we get higher resolution 130 * clock behavior (currently defined to be 1000 hz). Higher values seem 131 * to work, but are not supported. 132 * 133 * If we do decide to play with higher values, remember that hz should 134 * satisfy the following constraints to avoid integer round-off problems: 135 * 136 * (1) hz should be in the range 100 <= hz <= MICROSEC. If hz exceeds 137 * MICROSEC, usec_per_tick will be zero and lots of stuff will break. 138 * Similarly, if hz < 100 then hz / 100 == 0 and stuff will break. 139 * 140 * (2) If hz <= 1000, it should be both a multiple of 100 and a 141 * divisor of 1000. 142 * 143 * (3) If hz > 1000, it should be both a multiple of 1000 and a 144 * divisor of MICROSEC. 145 * 146 * Thus the only reasonable values of hz (i.e. the values that won't 147 * cause roundoff error) are: 100, 200, 500, 1000, 2000, 4000, 5000, 148 * 8000, 10000, 20000, 25000, 40000, 50000, 100000, 125000, 200000, 149 * 250000, 500000, 1000000. As of this writing (1996) a clock rate 150 * of more than about 10 kHz seems utterly ridiculous, although 151 * this observation will no doubt seem quaintly amusing one day. 152 */ 153 #define HIRES_HZ_DEFAULT 1000 154 155 int hz = HZ_DEFAULT; 156 int hires_hz = HIRES_HZ_DEFAULT; 157 158 int hires_tick = 0; 159 int cpu_decay_factor = 10; /* this is no longer tied to clock */ 160 int max_hres_adj; /* maximum adjustment of hrtime per tick */ 161 int tick_per_msec; /* clock ticks per millisecond (zero if hz < 1000) */ 162 163 /* 164 * Milliseconds, Microseconds, and Nanoseconds per clock tick 165 * 166 * Note: 167 * msec_per_tick is zero if hz > 1000 168 */ 169 int msec_per_tick; 170 int usec_per_tick; 171 int nsec_per_tick; 172 173 /* 174 * Time Resolution values. These are defined in condvar.h and initialized in 175 * param_init(). Consumers of cv_reltimedwait() and cv_reltimedwait_sig() 176 * need to specify how accurate the timeout argument should be through 177 * one of these values. The intention is to allow the underlying implementation 178 * to anticipate or defer the expiration of timeouts, preventing unnecessary 179 * wakeups by batch processing similarly expiring events. 180 */ 181 time_res_t time_res[TR_COUNT]; 182 183 /* 184 * Setting "snooping" to a non-zero value will cause a deadman panic if 185 * snoop_interval microseconds elapse without lbolt increasing. The default 186 * snoop_interval is 50 seconds. 187 */ 188 #define SNOOP_INTERVAL_MIN (MICROSEC) 189 #define SNOOP_INTERVAL_DEFAULT (50 * MICROSEC) 190 191 int snooping = 0; 192 uint_t snoop_interval = SNOOP_INTERVAL_DEFAULT; 193 194 /* 195 * Tables of initialization functions, called from main(). 196 */ 197 198 extern void system_taskq_init(void); 199 extern void binit(void); 200 extern void space_init(void); 201 extern void dnlc_init(void); 202 extern void vfsinit(void); 203 extern void finit(void); 204 extern void strinit(void); 205 extern void flk_init(void); 206 extern void ftrace_init(void); 207 extern void softcall_init(void); 208 extern void ttyinit(void); 209 extern void schedctl_init(void); 210 extern void deadman_init(void); 211 extern void clock_timer_init(void); 212 extern void clock_realtime_init(void); 213 extern void clock_highres_init(void); 214 extern void clock_tick_mp_init(void); 215 extern void cu_init(void); 216 extern void callout_mp_init(void); 217 extern void cpu_seq_tbl_init(void); 218 219 void (*init_tbl[])(void) = { 220 system_taskq_init, 221 binit, 222 space_init, 223 dnlc_init, 224 vfsinit, 225 finit, 226 strinit, 227 serializer_init, 228 softcall_init, 229 ttyinit, 230 as_init, 231 pvn_init, 232 anon_init, 233 segvn_init, 234 flk_init, 235 cpu_seq_tbl_init, 236 schedctl_init, 237 fdb_init, 238 deadman_init, 239 clock_timer_init, 240 clock_realtime_init, 241 clock_highres_init, 242 0 243 }; 244 245 246 #if defined(__sparc) 247 extern void siron_mp_init(); 248 #endif 249 250 /* 251 * Any per cpu resources should be initialized via 252 * an entry in mp_init_tbl(). 253 */ 254 void (*mp_init_tbl[])(void) = { 255 ftrace_init, 256 cyclic_mp_init, 257 #if defined(__sparc) 258 siron_mp_init, 259 #endif 260 clock_tick_mp_init, 261 cu_init, 262 callout_mp_init, 263 0 264 }; 265 266 int maxusers; /* kitchen-sink knob for dynamic configuration */ 267 268 /* 269 * pidmax -- highest pid value assigned by the system 270 * Settable in /etc/system 271 */ 272 int pidmax = DEFAULT_MAXPID; 273 274 /* 275 * jump_pid - if set, this value is where pid numbers should start 276 * after the first few system pids (0-3) are used. If 0, pids are 277 * chosen in the usual way. This variable can be used to quickly 278 * create large pids (by setting it to 100000, for example). pids 279 * less than this value will never be chosen. 280 */ 281 pid_t jump_pid = DEFAULT_JUMPPID; 282 283 /* 284 * autoup -- used in struct var for dynamic config of the age a delayed-write 285 * buffer must be in seconds before bdflush will write it out. 286 */ 287 #define DEFAULT_AUTOUP 30 288 int autoup = DEFAULT_AUTOUP; 289 290 /* 291 * bufhwm -- tuneable variable for struct var for v_bufhwm. 292 * high water mark for buffer cache mem usage in units of K bytes. 293 * 294 * bufhwm_pct -- ditto, but given in % of physmem. 295 */ 296 int bufhwm = 0; 297 int bufhwm_pct = 0; 298 299 /* 300 * Process table. 301 */ 302 int maxpid; 303 int max_nprocs; /* set in param_init() */ 304 int maxuprc; /* set in param_init() */ 305 int reserved_procs; 306 int nthread = 1; 307 308 /* 309 * UFS tunables 310 */ 311 int ufs_ninode; /* declared here due to backwards compatibility */ 312 int ndquot; /* declared here due to backwards compatibility */ 313 314 /* 315 * Exec switch table. This is used by the generic exec module 316 * to switch out to the desired executable type, based on the 317 * magic number. The currently supported types are ELF, a.out 318 * (both NMAGIC and ZMAGIC), interpreter (#!) files, 319 * and Java executables. 320 */ 321 /* 322 * Magic numbers 323 */ 324 short elfmagic = 0x7f45; 325 short intpmagic = 0x2321; 326 short jmagic = 0x504b; 327 328 #if defined(__sparc) 329 short aout_nmagic = NMAGIC; 330 short aout_zmagic = ZMAGIC; 331 short aout_omagic = OMAGIC; 332 #endif 333 short nomagic = 0; 334 335 /* 336 * Magic strings 337 */ 338 #define ELF32MAGIC_STRING "\x7f""ELF\x1" 339 #define ELF64MAGIC_STRING "\x7f""ELF\x2" 340 #define INTPMAGIC_STRING "#!" 341 #define JAVAMAGIC_STRING "PK\003\004" 342 #define AOUT_OMAGIC_STRING "\x1""\x07" /* 0407 */ 343 #define AOUT_NMAGIC_STRING "\x1""\x08" /* 0410 */ 344 #define AOUT_ZMAGIC_STRING "\x1""\x0b" /* 0413 */ 345 #define NOMAGIC_STRING "" 346 347 #define SHBIN_CNTL(x) ((x)&037) 348 #define SHBINMAGIC_STRING {SHBIN_CNTL('k'), SHBIN_CNTL('s'), SHBIN_CNTL('h'), 0} 349 #define SHBINMAGIC_LEN 4 350 351 char elf32magicstr[] = ELF32MAGIC_STRING; 352 char elf64magicstr[] = ELF64MAGIC_STRING; 353 char intpmagicstr[] = INTPMAGIC_STRING; 354 char shbinmagicstr[] = SHBINMAGIC_STRING; 355 char javamagicstr[] = JAVAMAGIC_STRING; 356 #if defined(__sparc) 357 char aout_nmagicstr[] = AOUT_NMAGIC_STRING; 358 char aout_zmagicstr[] = AOUT_ZMAGIC_STRING; 359 char aout_omagicstr[] = AOUT_OMAGIC_STRING; 360 #endif 361 char nomagicstr[] = NOMAGIC_STRING; 362 363 char *execswnames[] = { 364 "elfexec", /* Elf32 */ 365 #ifdef _LP64 366 "elfexec", /* Elf64 */ 367 #endif 368 "intpexec", 369 "shbinexec", 370 "javaexec", 371 #if defined(__sparc) 372 "aoutexec", 373 "aoutexec", 374 "aoutexec", 375 #endif 376 NULL, 377 NULL, 378 NULL 379 }; 380 381 struct execsw execsw[] = { 382 { elf32magicstr, 0, 5, NULL, NULL, NULL }, 383 #ifdef _LP64 384 { elf64magicstr, 0, 5, NULL, NULL, NULL }, 385 #endif 386 { intpmagicstr, 0, 2, NULL, NULL, NULL }, 387 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL }, 388 { javamagicstr, 0, 4, NULL, NULL, NULL }, 389 #if defined(__sparc) 390 { aout_zmagicstr, 2, 2, NULL, NULL, NULL }, 391 { aout_nmagicstr, 2, 2, NULL, NULL, NULL }, 392 { aout_omagicstr, 2, 2, NULL, NULL, NULL }, 393 #endif 394 { nomagicstr, 0, 0, NULL, NULL, NULL }, 395 { nomagicstr, 0, 0, NULL, NULL, NULL }, 396 { nomagicstr, 0, 0, NULL, NULL, NULL }, 397 { nomagicstr, 0, 0, NULL, NULL, NULL } 398 }; 399 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */ 400 kmutex_t execsw_lock; /* Used for allocation of execsw entries */ 401 402 /* 403 * symbols added to make changing max-file-descriptors 404 * simple via /etc/system 405 */ 406 #define RLIM_FD_CUR 0x100 407 #define RLIM_FD_MAX 0x10000 408 409 uint_t rlim_fd_cur = RLIM_FD_CUR; 410 uint_t rlim_fd_max = RLIM_FD_MAX; 411 412 /* 413 * (Default resource limits were formerly declared here, but are now provided by 414 * the more general resource controls framework.) 415 */ 416 417 /* 418 * STREAMS tunables 419 */ 420 int nstrpush = 9; /* maximum # of modules/drivers on a stream */ 421 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */ 422 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */ 423 /* for `strmsgsz', zero means unlimited */ 424 /* 425 * Filesystem tunables 426 */ 427 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */ 428 int ngroups_max = NGROUPS_MAX_DEFAULT; 429 430 /* 431 * generic scheduling stuff 432 * 433 * Configurable parameters for RT and TS are in the respective 434 * scheduling class modules. 435 */ 436 437 pri_t maxclsyspri = MAXCLSYSPRI; 438 pri_t minclsyspri = MINCLSYSPRI; 439 char sys_name[] = "SYS"; 440 441 extern pri_t sys_init(); 442 extern classfuncs_t sys_classfuncs; 443 444 sclass_t sclass[] = { 445 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 0 }, 446 { "", NULL, NULL, NULL, 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 }; 456 457 int loaded_classes = 1; /* for loaded classes */ 458 kmutex_t class_lock; /* lock for class[] */ 459 460 int nclass = sizeof (sclass) / sizeof (sclass_t); 461 char initcls[] = "TS"; 462 char *defaultclass = initcls; 463 464 /* 465 * Tunable system parameters. 466 */ 467 468 /* 469 * The integers tune_* are done this way so that the tune 470 * data structure may be "tuned" if necessary from the /etc/system 471 * file. The tune data structure is initialized in param_init(); 472 */ 473 474 tune_t tune; 475 476 /* 477 * If freemem < t_getpgslow, then start to steal pages from processes. 478 */ 479 int tune_t_gpgslo = 25; 480 481 /* 482 * Rate at which fsflush is run, in seconds. 483 */ 484 #define DEFAULT_TUNE_T_FSFLUSHR 1 485 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 486 487 /* 488 * The minimum available resident (not swappable) memory to maintain 489 * in order to avoid deadlock. In pages. 490 */ 491 int tune_t_minarmem = 25; 492 493 /* 494 * The minimum available swappable memory to maintain in order to avoid 495 * deadlock. In pages. 496 */ 497 int tune_t_minasmem = 25; 498 499 int tune_t_flckrec = 512; /* max # of active frlocks */ 500 501 /* 502 * Number of currently available pages that cannot be 'locked' 503 * This is set in init_pages_pp_maximum, and must be initialized 504 * to zero here to detect an override in /etc/system 505 */ 506 pgcnt_t pages_pp_maximum = 0; 507 508 int boothowto; /* boot flags passed to kernel */ 509 struct var v; /* System Configuration Information */ 510 511 /* 512 * System Configuration Information 513 */ 514 515 /* 516 * The physical system's host identifier, expressed as a decimal string. 517 * Code should only directly access this value when writing to it (setting the 518 * physical system's host identifier). Code that reads the physical system's 519 * host identifier should use zone_get_hostid(NULL) instead. 520 */ 521 char hw_serial[HW_HOSTID_LEN] = "0"; 522 523 #if defined(__sparc) 524 525 /* 526 * On sparc machines, read hw_serial from the firmware at boot time 527 * and simply assert Sun is the hardware provider. Hmm. 528 */ 529 char architecture[] = "sparcv9"; 530 char architecture_32[] = "sparc"; 531 char hw_provider[] = "Sun_Microsystems"; 532 533 #elif defined(__i386) 534 535 /* 536 * On x86 machines, read hw_serial, hw_provider and srpc_domain from 537 * /etc/bootrc at boot time. 538 */ 539 char architecture[] = "i386"; 540 char architecture_32[] = "i386"; 541 char hw_provider[SYS_NMLN] = ""; 542 543 #elif defined(__amd64) 544 545 /* 546 * On amd64 machines, read hw_serial, hw_provider and srpc_domain from 547 * /etc/bootrc at boot time. 548 */ 549 char architecture[] = "amd64"; 550 char architecture_32[] = "i386"; 551 char hw_provider[SYS_NMLN] = ""; 552 553 #else 554 #error "unknown processor architecture" 555 #endif 556 557 char srpc_domain[SYS_NMLN] = ""; 558 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */ 559 560 /* Initialize isa_list */ 561 char *isa_list = architecture; 562 563 static pgcnt_t original_physmem = 0; 564 565 #define MIN_DEFAULT_MAXUSERS 8u 566 #define MAX_DEFAULT_MAXUSERS 2048u 567 #define MAX_MAXUSERS 4096u 568 569 void 570 param_preset(void) 571 { 572 original_physmem = physmem; 573 } 574 575 void 576 param_calc(int platform_max_nprocs) 577 { 578 /* 579 * Default to about one "user" per megabyte, taking into 580 * account both physical and virtual constraints. 581 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT) 582 * converts pages to megs without integer overflow. 583 */ 584 #if defined(__sparc) 585 if (physmem > original_physmem) { 586 physmem = original_physmem; 587 cmn_err(CE_NOTE, "physmem limited to %ld", physmem); 588 } 589 #endif 590 if (maxusers == 0) { 591 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT); 592 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20; 593 maxusers = MIN(MAX(MIN(physmegs, virtmegs), 594 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS); 595 } 596 if (maxusers > MAX_MAXUSERS) { 597 maxusers = MAX_MAXUSERS; 598 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS); 599 } 600 601 if (ngroups_max > NGROUPS_MAX_DEFAULT) 602 cmn_err(CE_WARN, "ngroups_max of %d > %d, NFS AUTH_SYS will" 603 " not work properly", ngroups_max, NGROUPS_MAX_DEFAULT); 604 605 #ifdef DEBUG 606 /* 607 * The purpose of maxusers is to prevent memory overcommit. 608 * DEBUG kernels take more space, so reduce maxusers a bit. 609 */ 610 maxusers = (3 * maxusers) / 4; 611 #endif 612 613 /* 614 * We need to dynamically change any variables now so that 615 * the setting of maxusers and pidmax propagate to the other 616 * variables that are dependent on them. 617 */ 618 if (reserved_procs == 0) 619 reserved_procs = 5; 620 if (pidmax < reserved_procs || pidmax > MAX_MAXPID) 621 maxpid = MAX_MAXPID; 622 else 623 maxpid = pidmax; 624 625 /* 626 * This allows platform-dependent code to constrain the maximum 627 * number of processes allowed in case there are e.g. VM limitations 628 * with how many contexts are available. 629 */ 630 if (max_nprocs == 0) 631 max_nprocs = (10 + 16 * maxusers); 632 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs) 633 max_nprocs = platform_max_nprocs; 634 if (max_nprocs > maxpid) 635 max_nprocs = maxpid; 636 637 if (maxuprc == 0) 638 maxuprc = (max_nprocs - reserved_procs); 639 } 640 641 void 642 param_init(void) 643 { 644 /* 645 * Set each individual element of struct var v to be the 646 * default value. This is done this way 647 * so that a user can set the assigned integer value in the 648 * /etc/system file *IF* tuning is needed. 649 */ 650 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */ 651 v.v_maxupttl = max_nprocs - reserved_procs; 652 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */ 653 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */ 654 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */ 655 656 /* 657 * Set each individual element of struct tune to be the 658 * default value. Each struct element This is done this way 659 * so that a user can set the assigned integer value in the 660 * /etc/system file *IF* tuning is needed. 661 */ 662 tune.t_gpgslo = tune_t_gpgslo; 663 tune.t_fsflushr = tune_t_fsflushr; 664 tune.t_minarmem = tune_t_minarmem; 665 tune.t_minasmem = tune_t_minasmem; 666 tune.t_flckrec = tune_t_flckrec; 667 668 /* 669 * Initialization for file descriptors to correct mistaken settings in 670 * /etc/system. Initialization of limits performed by resource control 671 * system. 672 */ 673 if (rlim_fd_cur > rlim_fd_max) 674 rlim_fd_cur = rlim_fd_max; 675 676 /* 677 * calculations needed if hz was set in /etc/system 678 */ 679 if (hires_tick) 680 hz = hires_hz; 681 682 tick_per_msec = hz / MILLISEC; 683 msec_per_tick = MILLISEC / hz; 684 usec_per_tick = MICROSEC / hz; 685 nsec_per_tick = NANOSEC / hz; 686 max_hres_adj = nsec_per_tick >> ADJ_SHIFT; 687 688 /* 689 * Consumers of relative timedwait functions must specify how accurately 690 * the given timeout must expire. This is currently TR_CLOCK_TICK for 691 * the vast majority of consumers, but nsec_per_tick becomes an 692 * artificial value in a tickless world. Each caller of such routines 693 * should re-evaluate their usage and specify the appropriate 694 * resolution. 695 */ 696 time_res[TR_NANOSEC] = SEC; 697 time_res[TR_MICROSEC] = MILLISEC; 698 time_res[TR_MILLISEC] = MICROSEC; 699 time_res[TR_SEC] = NANOSEC; 700 time_res[TR_CLOCK_TICK] = nsec_per_tick; 701 } 702 703 /* 704 * Validate tuneable parameters following /etc/system processing, 705 * but prior to param_init(). 706 */ 707 void 708 param_check(void) 709 { 710 #if defined(__x86) 711 if (physmem != original_physmem) { 712 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx" 713 " via /etc/system. Please use eeprom(1M) instead.", 714 physmem); 715 physmem = original_physmem; 716 } 717 #endif 718 if (ngroups_max < NGROUPS_UMIN) 719 ngroups_max = NGROUPS_UMIN; 720 if (ngroups_max > NGROUPS_UMAX) 721 ngroups_max = NGROUPS_UMAX; 722 723 /* If we have many groups then the ucred proto message also grows. */ 724 if (ngroups_max > NGROUPS_OLDMAX && 725 strctlsz < (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 1024) { 726 strctlsz = (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 727 1024; 728 } 729 730 if (autoup <= 0) { 731 autoup = DEFAULT_AUTOUP; 732 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup); 733 } 734 735 if (tune_t_fsflushr <= 0) { 736 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 737 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d", 738 tune_t_fsflushr); 739 } 740 741 if (jump_pid < 0 || jump_pid >= pidmax) { 742 jump_pid = 0; 743 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored"); 744 } 745 746 if (snoop_interval < SNOOP_INTERVAL_MIN) { 747 snoop_interval = SNOOP_INTERVAL_DEFAULT; 748 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting" 749 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT); 750 } 751 } 752