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 callout_mp_init(void); 216 extern void cpu_seq_tbl_init(void); 217 218 void (*init_tbl[])(void) = { 219 system_taskq_init, 220 binit, 221 space_init, 222 dnlc_init, 223 vfsinit, 224 finit, 225 strinit, 226 serializer_init, 227 softcall_init, 228 ttyinit, 229 as_init, 230 pvn_init, 231 anon_init, 232 segvn_init, 233 flk_init, 234 cpu_seq_tbl_init, 235 schedctl_init, 236 fdb_init, 237 deadman_init, 238 clock_timer_init, 239 clock_realtime_init, 240 clock_highres_init, 241 0 242 }; 243 244 245 #if defined(__sparc) 246 extern void siron_mp_init(); 247 #endif 248 249 /* 250 * Any per cpu resources should be initialized via 251 * an entry in mp_init_tbl(). 252 */ 253 void (*mp_init_tbl[])(void) = { 254 ftrace_init, 255 cyclic_mp_init, 256 #if defined(__sparc) 257 siron_mp_init, 258 #endif 259 clock_tick_mp_init, 260 callout_mp_init, 261 0 262 }; 263 264 int maxusers; /* kitchen-sink knob for dynamic configuration */ 265 266 /* 267 * pidmax -- highest pid value assigned by the system 268 * Settable in /etc/system 269 */ 270 int pidmax = DEFAULT_MAXPID; 271 272 /* 273 * jump_pid - if set, this value is where pid numbers should start 274 * after the first few system pids (0-3) are used. If 0, pids are 275 * chosen in the usual way. This variable can be used to quickly 276 * create large pids (by setting it to 100000, for example). pids 277 * less than this value will never be chosen. 278 */ 279 pid_t jump_pid = DEFAULT_JUMPPID; 280 281 /* 282 * autoup -- used in struct var for dynamic config of the age a delayed-write 283 * buffer must be in seconds before bdflush will write it out. 284 */ 285 #define DEFAULT_AUTOUP 30 286 int autoup = DEFAULT_AUTOUP; 287 288 /* 289 * bufhwm -- tuneable variable for struct var for v_bufhwm. 290 * high water mark for buffer cache mem usage in units of K bytes. 291 * 292 * bufhwm_pct -- ditto, but given in % of physmem. 293 */ 294 int bufhwm = 0; 295 int bufhwm_pct = 0; 296 297 /* 298 * Process table. 299 */ 300 int maxpid; 301 int max_nprocs; /* set in param_init() */ 302 int maxuprc; /* set in param_init() */ 303 int reserved_procs; 304 int nthread = 1; 305 306 /* 307 * UFS tunables 308 */ 309 int ufs_ninode; /* declared here due to backwards compatibility */ 310 int ndquot; /* declared here due to backwards compatibility */ 311 312 /* 313 * Exec switch table. This is used by the generic exec module 314 * to switch out to the desired executable type, based on the 315 * magic number. The currently supported types are ELF, a.out 316 * (both NMAGIC and ZMAGIC), interpreter (#!) files, 317 * and Java executables. 318 */ 319 /* 320 * Magic numbers 321 */ 322 short elfmagic = 0x7f45; 323 short intpmagic = 0x2321; 324 short jmagic = 0x504b; 325 326 #if defined(__sparc) 327 short aout_nmagic = NMAGIC; 328 short aout_zmagic = ZMAGIC; 329 short aout_omagic = OMAGIC; 330 #endif 331 short nomagic = 0; 332 333 /* 334 * Magic strings 335 */ 336 #define ELF32MAGIC_STRING "\x7f""ELF\x1" 337 #define ELF64MAGIC_STRING "\x7f""ELF\x2" 338 #define INTPMAGIC_STRING "#!" 339 #define JAVAMAGIC_STRING "PK\003\004" 340 #define AOUT_OMAGIC_STRING "\x1""\x07" /* 0407 */ 341 #define AOUT_NMAGIC_STRING "\x1""\x08" /* 0410 */ 342 #define AOUT_ZMAGIC_STRING "\x1""\x0b" /* 0413 */ 343 #define NOMAGIC_STRING "" 344 345 #define SHBIN_CNTL(x) ((x)&037) 346 #define SHBINMAGIC_STRING {SHBIN_CNTL('k'), SHBIN_CNTL('s'), SHBIN_CNTL('h'), 0} 347 #define SHBINMAGIC_LEN 4 348 349 char elf32magicstr[] = ELF32MAGIC_STRING; 350 char elf64magicstr[] = ELF64MAGIC_STRING; 351 char intpmagicstr[] = INTPMAGIC_STRING; 352 char shbinmagicstr[] = SHBINMAGIC_STRING; 353 char javamagicstr[] = JAVAMAGIC_STRING; 354 #if defined(__sparc) 355 char aout_nmagicstr[] = AOUT_NMAGIC_STRING; 356 char aout_zmagicstr[] = AOUT_ZMAGIC_STRING; 357 char aout_omagicstr[] = AOUT_OMAGIC_STRING; 358 #endif 359 char nomagicstr[] = NOMAGIC_STRING; 360 361 char *execswnames[] = { 362 "elfexec", /* Elf32 */ 363 #ifdef _LP64 364 "elfexec", /* Elf64 */ 365 #endif 366 "intpexec", 367 "shbinexec", 368 "javaexec", 369 #if defined(__sparc) 370 "aoutexec", 371 "aoutexec", 372 "aoutexec", 373 #endif 374 NULL, 375 NULL, 376 NULL 377 }; 378 379 struct execsw execsw[] = { 380 { elf32magicstr, 0, 5, NULL, NULL, NULL }, 381 #ifdef _LP64 382 { elf64magicstr, 0, 5, NULL, NULL, NULL }, 383 #endif 384 { intpmagicstr, 0, 2, NULL, NULL, NULL }, 385 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL }, 386 { javamagicstr, 0, 4, NULL, NULL, NULL }, 387 #if defined(__sparc) 388 { aout_zmagicstr, 2, 2, NULL, NULL, NULL }, 389 { aout_nmagicstr, 2, 2, NULL, NULL, NULL }, 390 { aout_omagicstr, 2, 2, NULL, NULL, NULL }, 391 #endif 392 { nomagicstr, 0, 0, NULL, NULL, NULL }, 393 { nomagicstr, 0, 0, NULL, NULL, NULL }, 394 { nomagicstr, 0, 0, NULL, NULL, NULL }, 395 { nomagicstr, 0, 0, NULL, NULL, NULL } 396 }; 397 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */ 398 kmutex_t execsw_lock; /* Used for allocation of execsw entries */ 399 400 /* 401 * symbols added to make changing max-file-descriptors 402 * simple via /etc/system 403 */ 404 #define RLIM_FD_CUR 0x100 405 #define RLIM_FD_MAX 0x10000 406 407 uint_t rlim_fd_cur = RLIM_FD_CUR; 408 uint_t rlim_fd_max = RLIM_FD_MAX; 409 410 /* 411 * (Default resource limits were formerly declared here, but are now provided by 412 * the more general resource controls framework.) 413 */ 414 415 /* 416 * STREAMS tunables 417 */ 418 int nstrpush = 9; /* maximum # of modules/drivers on a stream */ 419 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */ 420 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */ 421 /* for `strmsgsz', zero means unlimited */ 422 /* 423 * Filesystem tunables 424 */ 425 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */ 426 int ngroups_max = NGROUPS_MAX_DEFAULT; 427 428 /* 429 * generic scheduling stuff 430 * 431 * Configurable parameters for RT and TS are in the respective 432 * scheduling class modules. 433 */ 434 435 pri_t maxclsyspri = MAXCLSYSPRI; 436 pri_t minclsyspri = MINCLSYSPRI; 437 char sys_name[] = "SYS"; 438 439 extern pri_t sys_init(); 440 extern classfuncs_t sys_classfuncs; 441 442 sclass_t sclass[] = { 443 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 0 }, 444 { "", NULL, NULL, NULL, 0 }, 445 { "", NULL, NULL, NULL, 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 }; 454 455 int loaded_classes = 1; /* for loaded classes */ 456 kmutex_t class_lock; /* lock for class[] */ 457 458 int nclass = sizeof (sclass) / sizeof (sclass_t); 459 char initcls[] = "TS"; 460 char *defaultclass = initcls; 461 462 /* 463 * Tunable system parameters. 464 */ 465 466 /* 467 * The integers tune_* are done this way so that the tune 468 * data structure may be "tuned" if necessary from the /etc/system 469 * file. The tune data structure is initialized in param_init(); 470 */ 471 472 tune_t tune; 473 474 /* 475 * If freemem < t_getpgslow, then start to steal pages from processes. 476 */ 477 int tune_t_gpgslo = 25; 478 479 /* 480 * Rate at which fsflush is run, in seconds. 481 */ 482 #define DEFAULT_TUNE_T_FSFLUSHR 1 483 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 484 485 /* 486 * The minimum available resident (not swappable) memory to maintain 487 * in order to avoid deadlock. In pages. 488 */ 489 int tune_t_minarmem = 25; 490 491 /* 492 * The minimum available swappable memory to maintain in order to avoid 493 * deadlock. In pages. 494 */ 495 int tune_t_minasmem = 25; 496 497 int tune_t_flckrec = 512; /* max # of active frlocks */ 498 499 /* 500 * Number of currently available pages that cannot be 'locked' 501 * This is set in init_pages_pp_maximum, and must be initialized 502 * to zero here to detect an override in /etc/system 503 */ 504 pgcnt_t pages_pp_maximum = 0; 505 506 int boothowto; /* boot flags passed to kernel */ 507 struct var v; /* System Configuration Information */ 508 509 /* 510 * System Configuration Information 511 */ 512 513 /* 514 * The physical system's host identifier, expressed as a decimal string. 515 * Code should only directly access this value when writing to it (setting the 516 * physical system's host identifier). Code that reads the physical system's 517 * host identifier should use zone_get_hostid(NULL) instead. 518 */ 519 char hw_serial[HW_HOSTID_LEN] = "0"; 520 521 #if defined(__sparc) 522 523 /* 524 * On sparc machines, read hw_serial from the firmware at boot time 525 * and simply assert Sun is the hardware provider. Hmm. 526 */ 527 char architecture[] = "sparcv9"; 528 char architecture_32[] = "sparc"; 529 char hw_provider[] = "Sun_Microsystems"; 530 531 #elif defined(__i386) 532 533 /* 534 * On x86 machines, read hw_serial, hw_provider and srpc_domain from 535 * /etc/bootrc at boot time. 536 */ 537 char architecture[] = "i386"; 538 char architecture_32[] = "i386"; 539 char hw_provider[SYS_NMLN] = ""; 540 541 #elif defined(__amd64) 542 543 /* 544 * On amd64 machines, read hw_serial, hw_provider and srpc_domain from 545 * /etc/bootrc at boot time. 546 */ 547 char architecture[] = "amd64"; 548 char architecture_32[] = "i386"; 549 char hw_provider[SYS_NMLN] = ""; 550 551 #else 552 #error "unknown processor architecture" 553 #endif 554 555 char srpc_domain[SYS_NMLN] = ""; 556 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */ 557 558 /* Initialize isa_list */ 559 char *isa_list = architecture; 560 561 static pgcnt_t original_physmem = 0; 562 563 #define MIN_DEFAULT_MAXUSERS 8u 564 #define MAX_DEFAULT_MAXUSERS 2048u 565 #define MAX_MAXUSERS 4096u 566 567 void 568 param_preset(void) 569 { 570 original_physmem = physmem; 571 } 572 573 void 574 param_calc(int platform_max_nprocs) 575 { 576 /* 577 * Default to about one "user" per megabyte, taking into 578 * account both physical and virtual constraints. 579 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT) 580 * converts pages to megs without integer overflow. 581 */ 582 #if defined(__sparc) 583 if (physmem > original_physmem) { 584 physmem = original_physmem; 585 cmn_err(CE_NOTE, "physmem limited to %ld", physmem); 586 } 587 #endif 588 if (maxusers == 0) { 589 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT); 590 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20; 591 maxusers = MIN(MAX(MIN(physmegs, virtmegs), 592 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS); 593 } 594 if (maxusers > MAX_MAXUSERS) { 595 maxusers = MAX_MAXUSERS; 596 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS); 597 } 598 599 if (ngroups_max > NGROUPS_MAX_DEFAULT) 600 cmn_err(CE_WARN, "ngroups_max of %d > %d, NFS AUTH_SYS will" 601 " not work properly", ngroups_max, NGROUPS_MAX_DEFAULT); 602 603 #ifdef DEBUG 604 /* 605 * The purpose of maxusers is to prevent memory overcommit. 606 * DEBUG kernels take more space, so reduce maxusers a bit. 607 */ 608 maxusers = (3 * maxusers) / 4; 609 #endif 610 611 /* 612 * We need to dynamically change any variables now so that 613 * the setting of maxusers and pidmax propagate to the other 614 * variables that are dependent on them. 615 */ 616 if (reserved_procs == 0) 617 reserved_procs = 5; 618 if (pidmax < reserved_procs || pidmax > MAX_MAXPID) 619 maxpid = MAX_MAXPID; 620 else 621 maxpid = pidmax; 622 623 /* 624 * This allows platform-dependent code to constrain the maximum 625 * number of processes allowed in case there are e.g. VM limitations 626 * with how many contexts are available. 627 */ 628 if (max_nprocs == 0) 629 max_nprocs = (10 + 16 * maxusers); 630 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs) 631 max_nprocs = platform_max_nprocs; 632 if (max_nprocs > maxpid) 633 max_nprocs = maxpid; 634 635 if (maxuprc == 0) 636 maxuprc = (max_nprocs - reserved_procs); 637 } 638 639 void 640 param_init(void) 641 { 642 /* 643 * Set each individual element of struct var v to be the 644 * default value. This is done this way 645 * so that a user can set the assigned integer value in the 646 * /etc/system file *IF* tuning is needed. 647 */ 648 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */ 649 v.v_maxupttl = max_nprocs - reserved_procs; 650 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */ 651 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */ 652 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */ 653 654 /* 655 * Set each individual element of struct tune to be the 656 * default value. Each struct element This is done this way 657 * so that a user can set the assigned integer value in the 658 * /etc/system file *IF* tuning is needed. 659 */ 660 tune.t_gpgslo = tune_t_gpgslo; 661 tune.t_fsflushr = tune_t_fsflushr; 662 tune.t_minarmem = tune_t_minarmem; 663 tune.t_minasmem = tune_t_minasmem; 664 tune.t_flckrec = tune_t_flckrec; 665 666 /* 667 * Initialization for file descriptors to correct mistaken settings in 668 * /etc/system. Initialization of limits performed by resource control 669 * system. 670 */ 671 if (rlim_fd_cur > rlim_fd_max) 672 rlim_fd_cur = rlim_fd_max; 673 674 /* 675 * calculations needed if hz was set in /etc/system 676 */ 677 if (hires_tick) 678 hz = hires_hz; 679 680 tick_per_msec = hz / MILLISEC; 681 msec_per_tick = MILLISEC / hz; 682 usec_per_tick = MICROSEC / hz; 683 nsec_per_tick = NANOSEC / hz; 684 max_hres_adj = nsec_per_tick >> ADJ_SHIFT; 685 686 /* 687 * Consumers of relative timedwait functions must specify how accurately 688 * the given timeout must expire. This is currently TR_CLOCK_TICK for 689 * the vast majority of consumers, but nsec_per_tick becomes an 690 * artificial value in a tickless world. Each caller of such routines 691 * should re-evaluate their usage and specify the appropriate 692 * resolution. 693 */ 694 time_res[TR_NANOSEC] = SEC; 695 time_res[TR_MICROSEC] = MILLISEC; 696 time_res[TR_MILLISEC] = MICROSEC; 697 time_res[TR_SEC] = NANOSEC; 698 time_res[TR_CLOCK_TICK] = nsec_per_tick; 699 } 700 701 /* 702 * Validate tuneable parameters following /etc/system processing, 703 * but prior to param_init(). 704 */ 705 void 706 param_check(void) 707 { 708 #if defined(__x86) 709 if (physmem != original_physmem) { 710 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx" 711 " via /etc/system. Please use eeprom(1M) instead.", 712 physmem); 713 physmem = original_physmem; 714 } 715 #endif 716 if (ngroups_max < NGROUPS_UMIN || ngroups_max > NGROUPS_UMAX) 717 ngroups_max = NGROUPS_MAX_DEFAULT; 718 719 if (autoup <= 0) { 720 autoup = DEFAULT_AUTOUP; 721 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup); 722 } 723 724 if (tune_t_fsflushr <= 0) { 725 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 726 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d", 727 tune_t_fsflushr); 728 } 729 730 if (jump_pid < 0 || jump_pid >= pidmax) { 731 jump_pid = 0; 732 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored"); 733 } 734 735 if (snoop_interval < SNOOP_INTERVAL_MIN) { 736 snoop_interval = SNOOP_INTERVAL_DEFAULT; 737 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting" 738 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT); 739 } 740 } 741