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 /* 23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 1983, 2010, Oracle and/or its affiliates. All rights reserved. 25 * Copyright 2012 Milan Jurik. All rights reserved. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/time.h> 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/signal.h> 33 #include <sys/sysmacros.h> 34 #include <sys/cmn_err.h> 35 #include <sys/user.h> 36 #include <sys/proc.h> 37 #include <sys/task.h> 38 #include <sys/project.h> 39 #include <sys/klwp.h> 40 #include <sys/vnode.h> 41 #include <sys/file.h> 42 #include <sys/fcntl.h> 43 #include <sys/flock.h> 44 #include <sys/var.h> 45 #include <sys/stream.h> 46 #include <sys/strsubr.h> 47 #include <sys/conf.h> 48 #include <sys/class.h> 49 #include <sys/ts.h> 50 #include <sys/rt.h> 51 #include <sys/exec.h> 52 #include <sys/exechdr.h> 53 #include <sys/buf.h> 54 #include <sys/resource.h> 55 #include <vm/seg.h> 56 #include <vm/pvn.h> 57 #include <vm/seg_kmem.h> 58 #include <sys/vmparam.h> 59 #include <sys/machparam.h> 60 #include <sys/utsname.h> 61 #include <sys/kmem.h> 62 #include <sys/stack.h> 63 #include <sys/modctl.h> 64 #include <sys/fdbuffer.h> 65 #include <sys/cyclic_impl.h> 66 #include <sys/disp.h> 67 #include <sys/tuneable.h> 68 #include <sys/systeminfo.h> 69 70 #include <sys/vmem.h> 71 #include <sys/clock.h> 72 #include <sys/clock_impl.h> 73 #include <sys/serializer.h> 74 75 /* 76 * The following few lines describe generic things that must be compiled 77 * into the booted executable (unix) rather than genunix or any other 78 * module because they're required by crash dump readers, etc. 79 */ 80 struct modctl modules; /* head of linked list of modules */ 81 char *default_path; /* default module loading path */ 82 struct swapinfo *swapinfo; /* protected by the swapinfo_lock */ 83 proc_t *practive; /* active process list */ 84 uint_t nproc; /* current number of processes */ 85 proc_t p0; /* process 0 */ 86 struct plock p0lock; /* p0's p_lock */ 87 klwp_t lwp0; /* t0's lwp */ 88 task_t *task0p; /* task 0 */ 89 kproject_t *proj0p; /* location of project 0 */ 90 91 /* 92 * The following are "implementation architecture" dependent constants made 93 * available here in the form of initialized data for use by "implementation 94 * architecture" independent modules. See machparam.h. 95 */ 96 const unsigned long _pagesize = (unsigned long)PAGESIZE; 97 const unsigned int _pageshift = (unsigned int)PAGESHIFT; 98 const unsigned long _pageoffset = (unsigned long)PAGEOFFSET; 99 /* 100 * XXX - This value pagemask has to be a 64bit size because 101 * large file support uses this mask on offsets which are 64 bit size. 102 * using unsigned leaves the higher 32 bits value as zero thus 103 * corrupting offset calculations in the file system and VM. 104 */ 105 const u_longlong_t _pagemask = (u_longlong_t)PAGEMASK; 106 const unsigned long _mmu_pagesize = (unsigned long)MMU_PAGESIZE; 107 const unsigned int _mmu_pageshift = (unsigned int)MMU_PAGESHIFT; 108 const unsigned long _mmu_pageoffset = (unsigned long)MMU_PAGEOFFSET; 109 const unsigned long _mmu_pagemask = (unsigned long)MMU_PAGEMASK; 110 uintptr_t _kernelbase = (uintptr_t)KERNELBASE; 111 uintptr_t _userlimit = (uintptr_t)USERLIMIT; 112 uintptr_t _userlimit32 = (uintptr_t)USERLIMIT32; 113 const uintptr_t _argsbase = (uintptr_t)ARGSBASE; 114 const unsigned int _diskrpm = (unsigned int)DISKRPM; 115 const unsigned long _pgthresh = (unsigned long)PGTHRESH; 116 const unsigned int _maxslp = (unsigned int)MAXSLP; 117 const unsigned long _maxhandspreadpages = (unsigned long)MAXHANDSPREADPAGES; 118 const int _ncpu = (int)NCPU; 119 const int _ncpu_log2 = (int)NCPU_LOG2; 120 const int _ncpu_p2 = (int)NCPU_P2; 121 const unsigned long _defaultstksz = (unsigned long)DEFAULTSTKSZ; 122 const unsigned int _nbpg = (unsigned int)MMU_PAGESIZE; 123 124 /* 125 * System parameter formulae. 126 * 127 * This file is copied into each directory where we compile 128 * the kernel; it should be modified there to suit local taste 129 * if necessary. 130 */ 131 132 /* 133 * Default hz is 100, but if we set hires_tick we get higher resolution 134 * clock behavior (currently defined to be 1000 hz). Higher values seem 135 * to work, but are not supported. 136 * 137 * If we do decide to play with higher values, remember that hz should 138 * satisfy the following constraints to avoid integer round-off problems: 139 * 140 * (1) hz should be in the range 100 <= hz <= MICROSEC. If hz exceeds 141 * MICROSEC, usec_per_tick will be zero and lots of stuff will break. 142 * Similarly, if hz < 100 then hz / 100 == 0 and stuff will break. 143 * 144 * (2) If hz <= 1000, it should be both a multiple of 100 and a 145 * divisor of 1000. 146 * 147 * (3) If hz > 1000, it should be both a multiple of 1000 and a 148 * divisor of MICROSEC. 149 * 150 * Thus the only reasonable values of hz (i.e. the values that won't 151 * cause roundoff error) are: 100, 200, 500, 1000, 2000, 4000, 5000, 152 * 8000, 10000, 20000, 25000, 40000, 50000, 100000, 125000, 200000, 153 * 250000, 500000, 1000000. As of this writing (1996) a clock rate 154 * of more than about 10 kHz seems utterly ridiculous, although 155 * this observation will no doubt seem quaintly amusing one day. 156 */ 157 #define HIRES_HZ_DEFAULT 1000 158 159 int hz = HZ_DEFAULT; 160 int hires_hz = HIRES_HZ_DEFAULT; 161 162 int hires_tick = 0; 163 int cpu_decay_factor = 10; /* this is no longer tied to clock */ 164 int max_hres_adj; /* maximum adjustment of hrtime per tick */ 165 int tick_per_msec; /* clock ticks per millisecond (zero if hz < 1000) */ 166 167 /* 168 * Milliseconds, Microseconds, and Nanoseconds per clock tick 169 * 170 * Note: 171 * msec_per_tick is zero if hz > 1000 172 */ 173 int msec_per_tick; 174 int usec_per_tick; 175 int nsec_per_tick; 176 177 /* 178 * Time Resolution values. These are defined in condvar.h and initialized in 179 * param_init(). Consumers of cv_reltimedwait() and cv_reltimedwait_sig() 180 * need to specify how accurate the timeout argument should be through 181 * one of these values. The intention is to allow the underlying implementation 182 * to anticipate or defer the expiration of timeouts, preventing unnecessary 183 * wakeups by batch processing similarly expiring events. 184 */ 185 time_res_t time_res[TR_COUNT]; 186 187 /* 188 * Setting "snooping" to a non-zero value will cause a deadman panic if 189 * snoop_interval microseconds elapse without lbolt increasing. The default 190 * snoop_interval is 50 seconds. 191 */ 192 #define SNOOP_INTERVAL_MIN (MICROSEC) 193 #define SNOOP_INTERVAL_DEFAULT (50 * MICROSEC) 194 195 int snooping = 0; 196 uint_t snoop_interval = SNOOP_INTERVAL_DEFAULT; 197 198 /* 199 * Tables of initialization functions, called from main(). 200 */ 201 202 extern void system_taskq_init(void); 203 extern void binit(void); 204 extern void space_init(void); 205 extern void dnlc_init(void); 206 extern void vfsinit(void); 207 extern void finit(void); 208 extern void strinit(void); 209 extern void flk_init(void); 210 extern void ftrace_init(void); 211 extern void softcall_init(void); 212 extern void ttyinit(void); 213 extern void schedctl_init(void); 214 extern void deadman_init(void); 215 extern void clock_timer_init(void); 216 extern void clock_realtime_init(void); 217 extern void clock_highres_init(void); 218 extern void clock_tick_mp_init(void); 219 extern void cu_init(void); 220 extern void callout_mp_init(void); 221 extern void cpu_seq_tbl_init(void); 222 223 void (*init_tbl[])(void) = { 224 system_taskq_init, 225 binit, 226 space_init, 227 dnlc_init, 228 vfsinit, 229 finit, 230 strinit, 231 serializer_init, 232 softcall_init, 233 ttyinit, 234 as_init, 235 pvn_init, 236 anon_init, 237 segvn_init, 238 flk_init, 239 cpu_seq_tbl_init, 240 schedctl_init, 241 fdb_init, 242 deadman_init, 243 clock_timer_init, 244 clock_realtime_init, 245 clock_highres_init, 246 0 247 }; 248 249 250 #if defined(__sparc) 251 extern void siron_mp_init(); 252 #endif 253 254 /* 255 * Any per cpu resources should be initialized via 256 * an entry in mp_init_tbl(). 257 */ 258 void (*mp_init_tbl[])(void) = { 259 ftrace_init, 260 cyclic_mp_init, 261 #if defined(__sparc) 262 siron_mp_init, 263 #endif 264 clock_tick_mp_init, 265 cu_init, 266 callout_mp_init, 267 0 268 }; 269 270 int maxusers; /* kitchen-sink knob for dynamic configuration */ 271 272 /* 273 * pidmax -- highest pid value assigned by the system 274 * Settable in /etc/system 275 */ 276 int pidmax = DEFAULT_MAXPID; 277 278 /* 279 * jump_pid - if set, this value is where pid numbers should start 280 * after the first few system pids (0-3) are used. If 0, pids are 281 * chosen in the usual way. This variable can be used to quickly 282 * create large pids (by setting it to 100000, for example). pids 283 * less than this value will never be chosen. 284 */ 285 pid_t jump_pid = DEFAULT_JUMPPID; 286 287 /* 288 * autoup -- used in struct var for dynamic config of the age a delayed-write 289 * buffer must be in seconds before bdflush will write it out. 290 */ 291 #define DEFAULT_AUTOUP 30 292 int autoup = DEFAULT_AUTOUP; 293 294 /* 295 * bufhwm -- tuneable variable for struct var for v_bufhwm. 296 * high water mark for buffer cache mem usage in units of K bytes. 297 * 298 * bufhwm_pct -- ditto, but given in % of physmem. 299 */ 300 int bufhwm = 0; 301 int bufhwm_pct = 0; 302 303 /* 304 * Process table. 305 */ 306 int maxpid; 307 int max_nprocs; /* set in param_init() */ 308 int maxuprc; /* set in param_init() */ 309 int reserved_procs; 310 int nthread = 1; 311 312 /* 313 * UFS tunables 314 */ 315 int ufs_ninode; /* declared here due to backwards compatibility */ 316 int ndquot; /* declared here due to backwards compatibility */ 317 318 /* 319 * Exec switch table. This is used by the generic exec module 320 * to switch out to the desired executable type, based on the 321 * magic number. The currently supported types are ELF, a.out 322 * (both NMAGIC and ZMAGIC), interpreter (#!) files, 323 * and Java executables. 324 */ 325 /* 326 * Magic numbers 327 */ 328 short elfmagic = 0x7f45; 329 short intpmagic = 0x2321; 330 short jmagic = 0x504b; 331 332 #if defined(__sparc) 333 short aout_nmagic = NMAGIC; 334 short aout_zmagic = ZMAGIC; 335 short aout_omagic = OMAGIC; 336 #endif 337 short nomagic = 0; 338 339 /* 340 * Magic strings 341 */ 342 #define ELF32MAGIC_STRING "\x7f""ELF\x1" 343 #define ELF64MAGIC_STRING "\x7f""ELF\x2" 344 #define INTPMAGIC_STRING "#!" 345 #define JAVAMAGIC_STRING "PK\003\004" 346 #define AOUT_OMAGIC_STRING "\x1""\x07" /* 0407 */ 347 #define AOUT_NMAGIC_STRING "\x1""\x08" /* 0410 */ 348 #define AOUT_ZMAGIC_STRING "\x1""\x0b" /* 0413 */ 349 #define NOMAGIC_STRING "" 350 351 #define SHBIN_CNTL(x) ((x)&037) 352 #define SHBINMAGIC_STRING {SHBIN_CNTL('k'), SHBIN_CNTL('s'), SHBIN_CNTL('h'), 0} 353 #define SHBINMAGIC_LEN 4 354 355 char elf32magicstr[] = ELF32MAGIC_STRING; 356 char elf64magicstr[] = ELF64MAGIC_STRING; 357 char intpmagicstr[] = INTPMAGIC_STRING; 358 char shbinmagicstr[] = SHBINMAGIC_STRING; 359 char javamagicstr[] = JAVAMAGIC_STRING; 360 #if defined(__sparc) 361 char aout_nmagicstr[] = AOUT_NMAGIC_STRING; 362 char aout_zmagicstr[] = AOUT_ZMAGIC_STRING; 363 char aout_omagicstr[] = AOUT_OMAGIC_STRING; 364 #endif 365 char nomagicstr[] = NOMAGIC_STRING; 366 367 char *execswnames[] = { 368 "elfexec", /* Elf32 */ 369 #ifdef _LP64 370 "elfexec", /* Elf64 */ 371 #endif 372 "intpexec", 373 "shbinexec", 374 "javaexec", 375 #if defined(__sparc) 376 "aoutexec", 377 "aoutexec", 378 "aoutexec", 379 #endif 380 NULL, 381 NULL, 382 NULL 383 }; 384 385 struct execsw execsw[] = { 386 { elf32magicstr, 0, 5, NULL, NULL, NULL }, 387 #ifdef _LP64 388 { elf64magicstr, 0, 5, NULL, NULL, NULL }, 389 #endif 390 { intpmagicstr, 0, 2, NULL, NULL, NULL }, 391 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL }, 392 { javamagicstr, 0, 4, NULL, NULL, NULL }, 393 #if defined(__sparc) 394 { aout_zmagicstr, 2, 2, NULL, NULL, NULL }, 395 { aout_nmagicstr, 2, 2, NULL, NULL, NULL }, 396 { aout_omagicstr, 2, 2, NULL, NULL, NULL }, 397 #endif 398 { nomagicstr, 0, 0, NULL, NULL, NULL }, 399 { nomagicstr, 0, 0, NULL, NULL, NULL }, 400 { nomagicstr, 0, 0, NULL, NULL, NULL }, 401 { nomagicstr, 0, 0, NULL, NULL, NULL } 402 }; 403 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */ 404 kmutex_t execsw_lock; /* Used for allocation of execsw entries */ 405 406 /* 407 * symbols added to make changing max-file-descriptors 408 * simple via /etc/system 409 */ 410 #define RLIM_FD_CUR 0x100 411 #define RLIM_FD_MAX 0x10000 412 413 uint_t rlim_fd_cur = RLIM_FD_CUR; 414 uint_t rlim_fd_max = RLIM_FD_MAX; 415 416 /* 417 * (Default resource limits were formerly declared here, but are now provided by 418 * the more general resource controls framework.) 419 */ 420 421 /* 422 * STREAMS tunables 423 */ 424 int nstrpush = 9; /* maximum # of modules/drivers on a stream */ 425 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */ 426 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */ 427 /* for `strmsgsz', zero means unlimited */ 428 /* 429 * Filesystem tunables 430 */ 431 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */ 432 int ngroups_max = NGROUPS_MAX_DEFAULT; 433 434 /* 435 * generic scheduling stuff 436 * 437 * Configurable parameters for RT and TS are in the respective 438 * scheduling class modules. 439 */ 440 441 pri_t maxclsyspri = MAXCLSYSPRI; 442 pri_t minclsyspri = MINCLSYSPRI; 443 char sys_name[] = "SYS"; 444 445 extern pri_t sys_init(id_t, int, classfuncs_t **); 446 extern classfuncs_t sys_classfuncs; 447 448 sclass_t sclass[] = { 449 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 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 { "", NULL, NULL, NULL, 0 }, 457 { "", NULL, NULL, NULL, 0 }, 458 { "", NULL, NULL, NULL, 0 } 459 }; 460 461 int loaded_classes = 1; /* for loaded classes */ 462 kmutex_t class_lock; /* lock for class[] */ 463 464 int nclass = sizeof (sclass) / sizeof (sclass_t); 465 char initcls[] = "TS"; 466 char *defaultclass = initcls; 467 468 /* 469 * Tunable system parameters. 470 */ 471 472 /* 473 * The integers tune_* are done this way so that the tune 474 * data structure may be "tuned" if necessary from the /etc/system 475 * file. The tune data structure is initialized in param_init(); 476 */ 477 478 tune_t tune; 479 480 /* 481 * If freemem < t_getpgslow, then start to steal pages from processes. 482 */ 483 int tune_t_gpgslo = 25; 484 485 /* 486 * Rate at which fsflush is run, in seconds. 487 */ 488 #define DEFAULT_TUNE_T_FSFLUSHR 1 489 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 490 491 /* 492 * The minimum available resident (not swappable) memory to maintain 493 * in order to avoid deadlock. In pages. 494 */ 495 int tune_t_minarmem = 25; 496 497 /* 498 * The minimum available swappable memory to maintain in order to avoid 499 * deadlock. In pages. 500 */ 501 int tune_t_minasmem = 25; 502 503 int tune_t_flckrec = 512; /* max # of active frlocks */ 504 505 /* 506 * Number of currently available pages that cannot be 'locked' 507 * This is set in init_pages_pp_maximum, and must be initialized 508 * to zero here to detect an override in /etc/system 509 */ 510 pgcnt_t pages_pp_maximum = 0; 511 512 int boothowto; /* boot flags passed to kernel */ 513 struct var v; /* System Configuration Information */ 514 515 /* 516 * System Configuration Information 517 */ 518 519 /* 520 * The physical system's host identifier, expressed as a decimal string. 521 * Code should only directly access this value when writing to it (setting the 522 * physical system's host identifier). Code that reads the physical system's 523 * host identifier should use zone_get_hostid(NULL) instead. 524 */ 525 char hw_serial[HW_HOSTID_LEN] = "0"; 526 527 #if defined(__sparc) 528 529 /* 530 * On sparc machines, read hw_serial from the firmware at boot time 531 * and simply assert Oracle is the hardware provider. 532 */ 533 char architecture[] = "sparcv9"; 534 char architecture_32[] = "sparc"; 535 char hw_provider[] = "Oracle Corporation"; 536 537 #elif defined(__i386) 538 539 char architecture[] = "i386"; 540 char architecture_32[] = "i386"; 541 char hw_provider[SYS_NMLN] = ""; 542 543 #elif defined(__amd64) 544 545 char architecture[] = "amd64"; 546 char architecture_32[] = "i386"; 547 char hw_provider[SYS_NMLN] = ""; 548 549 #else 550 #error "unknown processor architecture" 551 #endif 552 553 char srpc_domain[SYS_NMLN] = ""; 554 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */ 555 556 /* Initialize isa_list */ 557 char *isa_list = architecture; 558 559 static pgcnt_t original_physmem = 0; 560 561 #define MIN_DEFAULT_MAXUSERS 8u 562 #define MAX_DEFAULT_MAXUSERS 2048u 563 #define MAX_MAXUSERS 4096u 564 565 void 566 param_preset(void) 567 { 568 original_physmem = physmem; 569 } 570 571 void 572 param_calc(int platform_max_nprocs) 573 { 574 /* 575 * Default to about one "user" per megabyte, taking into 576 * account both physical and virtual constraints. 577 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT) 578 * converts pages to megs without integer overflow. 579 */ 580 #if defined(__sparc) 581 if (physmem > original_physmem) { 582 physmem = original_physmem; 583 cmn_err(CE_NOTE, "physmem limited to %ld", physmem); 584 } 585 #endif 586 if (maxusers == 0) { 587 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT); 588 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20; 589 maxusers = MIN(MAX(MIN(physmegs, virtmegs), 590 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS); 591 } 592 if (maxusers > MAX_MAXUSERS) { 593 maxusers = MAX_MAXUSERS; 594 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS); 595 } 596 597 #ifdef DEBUG 598 /* 599 * The purpose of maxusers is to prevent memory overcommit. 600 * DEBUG kernels take more space, so reduce maxusers a bit. 601 */ 602 maxusers = (3 * maxusers) / 4; 603 #endif 604 605 /* 606 * We need to dynamically change any variables now so that 607 * the setting of maxusers and pidmax propagate to the other 608 * variables that are dependent on them. 609 */ 610 if (reserved_procs == 0) 611 reserved_procs = 5; 612 if (pidmax < reserved_procs || pidmax > MAX_MAXPID) 613 maxpid = MAX_MAXPID; 614 else 615 maxpid = pidmax; 616 617 /* 618 * This allows platform-dependent code to constrain the maximum 619 * number of processes allowed in case there are e.g. VM limitations 620 * with how many contexts are available. 621 */ 622 if (max_nprocs == 0) 623 max_nprocs = (10 + 16 * maxusers); 624 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs) 625 max_nprocs = platform_max_nprocs; 626 if (max_nprocs > maxpid) 627 max_nprocs = maxpid; 628 629 if (maxuprc == 0) 630 maxuprc = (max_nprocs - reserved_procs); 631 } 632 633 void 634 param_init(void) 635 { 636 /* 637 * Set each individual element of struct var v to be the 638 * default value. This is done this way 639 * so that a user can set the assigned integer value in the 640 * /etc/system file *IF* tuning is needed. 641 */ 642 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */ 643 v.v_maxupttl = max_nprocs - reserved_procs; 644 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */ 645 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */ 646 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */ 647 648 /* 649 * Set each individual element of struct tune to be the 650 * default value. Each struct element This is done this way 651 * so that a user can set the assigned integer value in the 652 * /etc/system file *IF* tuning is needed. 653 */ 654 tune.t_gpgslo = tune_t_gpgslo; 655 tune.t_fsflushr = tune_t_fsflushr; 656 tune.t_minarmem = tune_t_minarmem; 657 tune.t_minasmem = tune_t_minasmem; 658 tune.t_flckrec = tune_t_flckrec; 659 660 /* 661 * Initialization for file descriptors to correct mistaken settings in 662 * /etc/system. Initialization of limits performed by resource control 663 * system. 664 */ 665 if (rlim_fd_cur > rlim_fd_max) 666 rlim_fd_cur = rlim_fd_max; 667 668 /* 669 * calculations needed if hz was set in /etc/system 670 */ 671 if (hires_tick) 672 hz = hires_hz; 673 674 tick_per_msec = hz / MILLISEC; 675 msec_per_tick = MILLISEC / hz; 676 usec_per_tick = MICROSEC / hz; 677 nsec_per_tick = NANOSEC / hz; 678 max_hres_adj = nsec_per_tick >> ADJ_SHIFT; 679 680 /* 681 * Consumers of relative timedwait functions must specify how accurately 682 * the given timeout must expire. This is currently TR_CLOCK_TICK for 683 * the vast majority of consumers, but nsec_per_tick becomes an 684 * artificial value in a tickless world. Each caller of such routines 685 * should re-evaluate their usage and specify the appropriate 686 * resolution. 687 */ 688 time_res[TR_NANOSEC] = NANOSEC / NANOSEC; 689 time_res[TR_MICROSEC] = NANOSEC / MICROSEC; 690 time_res[TR_MILLISEC] = NANOSEC / MILLISEC; 691 time_res[TR_SEC] = NANOSEC / SEC; 692 time_res[TR_CLOCK_TICK] = nsec_per_tick; 693 } 694 695 /* 696 * Validate tuneable parameters following /etc/system processing, 697 * but prior to param_init(). 698 */ 699 void 700 param_check(void) 701 { 702 #if defined(__x86) 703 if (physmem != original_physmem) { 704 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx" 705 " via /etc/system. Please use eeprom(1M) instead.", 706 physmem); 707 physmem = original_physmem; 708 } 709 #endif 710 if (ngroups_max < NGROUPS_UMIN) 711 ngroups_max = NGROUPS_UMIN; 712 if (ngroups_max > NGROUPS_UMAX) 713 ngroups_max = NGROUPS_UMAX; 714 715 /* If we have many groups then the ucred proto message also grows. */ 716 if (ngroups_max > NGROUPS_OLDMAX && 717 strctlsz < (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 1024) { 718 strctlsz = (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 719 1024; 720 } 721 722 if (autoup <= 0) { 723 autoup = DEFAULT_AUTOUP; 724 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup); 725 } 726 727 if (tune_t_fsflushr <= 0) { 728 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 729 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d", 730 tune_t_fsflushr); 731 } 732 733 if (jump_pid < 0 || jump_pid >= pidmax) { 734 jump_pid = 0; 735 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored"); 736 } 737 738 if (snoop_interval < SNOOP_INTERVAL_MIN) { 739 snoop_interval = SNOOP_INTERVAL_DEFAULT; 740 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting" 741 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT); 742 } 743 } 744