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/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 unsigned long _defaultstksz = (unsigned long)DEFAULTSTKSZ; 117 const unsigned int _nbpg = (unsigned int)MMU_PAGESIZE; 118 119 /* 120 * System parameter formulae. 121 * 122 * This file is copied into each directory where we compile 123 * the kernel; it should be modified there to suit local taste 124 * if necessary. 125 */ 126 127 /* 128 * Default hz is 100, but if we set hires_tick we get higher resolution 129 * clock behavior (currently defined to be 1000 hz). Higher values seem 130 * to work, but are not supported. 131 * 132 * If we do decide to play with higher values, remember that hz should 133 * satisfy the following constraints to avoid integer round-off problems: 134 * 135 * (1) hz should be in the range 100 <= hz <= MICROSEC. If hz exceeds 136 * MICROSEC, usec_per_tick will be zero and lots of stuff will break. 137 * Similarly, if hz < 100 then hz / 100 == 0 and stuff will break. 138 * 139 * (2) If hz <= 1000, it should be both a multiple of 100 and a 140 * divisor of 1000. 141 * 142 * (3) If hz > 1000, it should be both a multiple of 1000 and a 143 * divisor of MICROSEC. 144 * 145 * Thus the only reasonable values of hz (i.e. the values that won't 146 * cause roundoff error) are: 100, 200, 500, 1000, 2000, 4000, 5000, 147 * 8000, 10000, 20000, 25000, 40000, 50000, 100000, 125000, 200000, 148 * 250000, 500000, 1000000. As of this writing (1996) a clock rate 149 * of more than about 10 kHz seems utterly ridiculous, although 150 * this observation will no doubt seem quaintly amusing one day. 151 */ 152 int hz = 100; 153 int hires_hz = 1000; 154 int hires_tick = 0; 155 int cpu_decay_factor = 10; /* this is no longer tied to clock */ 156 int tick_per_msec; /* clock ticks per millisecond (zero if hz < 1000) */ 157 int msec_per_tick; /* millseconds per clock tick (zero if hz > 1000) */ 158 int usec_per_tick; /* microseconds per clock tick */ 159 int nsec_per_tick; /* nanoseconds per clock tick */ 160 int max_hres_adj; /* maximum adjustment of hrtime per tick */ 161 162 /* 163 * Setting "snooping" to a non-zero value will cause a deadman panic if 164 * snoop_interval microseconds elapse without lbolt increasing. The default 165 * snoop_interval is 50 seconds. 166 */ 167 #define SNOOP_INTERVAL_MIN (MICROSEC) 168 #define SNOOP_INTERVAL_DEFAULT (50 * MICROSEC) 169 170 int snooping = 0; 171 uint_t snoop_interval = SNOOP_INTERVAL_DEFAULT; 172 173 /* 174 * Tables of initialization functions, called from main(). 175 */ 176 177 extern void system_taskq_init(void); 178 extern void binit(void); 179 extern void space_init(void); 180 extern void dnlc_init(void); 181 extern void vfsinit(void); 182 extern void finit(void); 183 extern void strinit(void); 184 extern void flk_init(void); 185 extern void ftrace_init(void); 186 extern void softcall_init(void); 187 extern void ttyinit(void); 188 extern void schedctl_init(void); 189 extern void deadman_init(void); 190 extern void clock_timer_init(void); 191 extern void clock_realtime_init(void); 192 extern void clock_highres_init(void); 193 extern void pg_init(void); 194 extern void pg_cmt_class_init(void); 195 extern void pg_cpu0_init(void); 196 extern void clock_tick_mp_init(void); 197 extern void callout_mp_init(void); 198 extern void cpu_seq_tbl_init(void); 199 200 void (*init_tbl[])(void) = { 201 system_taskq_init, 202 binit, 203 space_init, 204 dnlc_init, 205 vfsinit, 206 finit, 207 strinit, 208 serializer_init, 209 softcall_init, 210 ttyinit, 211 as_init, 212 pvn_init, 213 anon_init, 214 segvn_init, 215 flk_init, 216 cpu_seq_tbl_init, 217 pg_init, 218 pg_cmt_class_init, 219 pg_cpu0_init, 220 schedctl_init, 221 fdb_init, 222 deadman_init, 223 clock_timer_init, 224 clock_realtime_init, 225 clock_highres_init, 226 0 227 }; 228 229 230 #if defined(__sparc) 231 extern void siron_mp_init(); 232 #endif 233 234 /* 235 * Any per cpu resources should be initialized via 236 * an entry in mp_init_tbl(). 237 */ 238 void (*mp_init_tbl[])(void) = { 239 ftrace_init, 240 cyclic_mp_init, 241 #if defined(__sparc) 242 siron_mp_init, 243 #endif 244 clock_tick_mp_init, 245 callout_mp_init, 246 0 247 }; 248 249 int maxusers; /* kitchen-sink knob for dynamic configuration */ 250 251 /* 252 * pidmax -- highest pid value assigned by the system 253 * Settable in /etc/system 254 */ 255 int pidmax = DEFAULT_MAXPID; 256 257 /* 258 * jump_pid - if set, this value is where pid numbers should start 259 * after the first few system pids (0-3) are used. If 0, pids are 260 * chosen in the usual way. This variable can be used to quickly 261 * create large pids (by setting it to 100000, for example). pids 262 * less than this value will never be chosen. 263 */ 264 pid_t jump_pid = DEFAULT_JUMPPID; 265 266 /* 267 * autoup -- used in struct var for dynamic config of the age a delayed-write 268 * buffer must be in seconds before bdflush will write it out. 269 */ 270 #define DEFAULT_AUTOUP 30 271 int autoup = DEFAULT_AUTOUP; 272 273 /* 274 * bufhwm -- tuneable variable for struct var for v_bufhwm. 275 * high water mark for buffer cache mem usage in units of K bytes. 276 * 277 * bufhwm_pct -- ditto, but given in % of physmem. 278 */ 279 int bufhwm = 0; 280 int bufhwm_pct = 0; 281 282 /* 283 * Process table. 284 */ 285 int maxpid; 286 int max_nprocs; /* set in param_init() */ 287 int maxuprc; /* set in param_init() */ 288 int reserved_procs; 289 int nthread = 1; 290 291 /* 292 * UFS tunables 293 */ 294 int ufs_ninode; /* declared here due to backwards compatibility */ 295 int ndquot; /* declared here due to backwards compatibility */ 296 297 /* 298 * Exec switch table. This is used by the generic exec module 299 * to switch out to the desired executable type, based on the 300 * magic number. The currently supported types are ELF, a.out 301 * (both NMAGIC and ZMAGIC), interpreter (#!) files, 302 * and Java executables. 303 */ 304 /* 305 * Magic numbers 306 */ 307 short elfmagic = 0x7f45; 308 short intpmagic = 0x2321; 309 short jmagic = 0x504b; 310 311 #if defined(__sparc) 312 short aout_nmagic = NMAGIC; 313 short aout_zmagic = ZMAGIC; 314 short aout_omagic = OMAGIC; 315 #endif 316 short nomagic = 0; 317 318 /* 319 * Magic strings 320 */ 321 #define ELF32MAGIC_STRING "\x7f""ELF\x1" 322 #define ELF64MAGIC_STRING "\x7f""ELF\x2" 323 #define INTPMAGIC_STRING "#!" 324 #define JAVAMAGIC_STRING "PK\003\004" 325 #define AOUT_OMAGIC_STRING "\x1""\x07" /* 0407 */ 326 #define AOUT_NMAGIC_STRING "\x1""\x08" /* 0410 */ 327 #define AOUT_ZMAGIC_STRING "\x1""\x0b" /* 0413 */ 328 #define NOMAGIC_STRING "" 329 330 #define SHBIN_CNTL(x) ((x)&037) 331 #define SHBINMAGIC_STRING {SHBIN_CNTL('k'), SHBIN_CNTL('s'), SHBIN_CNTL('h'), 0} 332 #define SHBINMAGIC_LEN 4 333 334 char elf32magicstr[] = ELF32MAGIC_STRING; 335 char elf64magicstr[] = ELF64MAGIC_STRING; 336 char intpmagicstr[] = INTPMAGIC_STRING; 337 char shbinmagicstr[] = SHBINMAGIC_STRING; 338 char javamagicstr[] = JAVAMAGIC_STRING; 339 #if defined(__sparc) 340 char aout_nmagicstr[] = AOUT_NMAGIC_STRING; 341 char aout_zmagicstr[] = AOUT_ZMAGIC_STRING; 342 char aout_omagicstr[] = AOUT_OMAGIC_STRING; 343 #endif 344 char nomagicstr[] = NOMAGIC_STRING; 345 346 char *execswnames[] = { 347 "elfexec", /* Elf32 */ 348 #ifdef _LP64 349 "elfexec", /* Elf64 */ 350 #endif 351 "intpexec", 352 "shbinexec", 353 "javaexec", 354 #if defined(__sparc) 355 "aoutexec", 356 "aoutexec", 357 "aoutexec", 358 #endif 359 NULL, 360 NULL, 361 NULL 362 }; 363 364 struct execsw execsw[] = { 365 { elf32magicstr, 0, 5, NULL, NULL, NULL }, 366 #ifdef _LP64 367 { elf64magicstr, 0, 5, NULL, NULL, NULL }, 368 #endif 369 { intpmagicstr, 0, 2, NULL, NULL, NULL }, 370 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL }, 371 { javamagicstr, 0, 4, NULL, NULL, NULL }, 372 #if defined(__sparc) 373 { aout_zmagicstr, 2, 2, NULL, NULL, NULL }, 374 { aout_nmagicstr, 2, 2, NULL, NULL, NULL }, 375 { aout_omagicstr, 2, 2, NULL, NULL, NULL }, 376 #endif 377 { nomagicstr, 0, 0, NULL, NULL, NULL }, 378 { nomagicstr, 0, 0, NULL, NULL, NULL }, 379 { nomagicstr, 0, 0, NULL, NULL, NULL }, 380 { nomagicstr, 0, 0, NULL, NULL, NULL } 381 }; 382 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */ 383 kmutex_t execsw_lock; /* Used for allocation of execsw entries */ 384 385 /* 386 * symbols added to make changing max-file-descriptors 387 * simple via /etc/system 388 */ 389 #define RLIM_FD_CUR 0x100 390 #define RLIM_FD_MAX 0x10000 391 392 uint_t rlim_fd_cur = RLIM_FD_CUR; 393 uint_t rlim_fd_max = RLIM_FD_MAX; 394 395 /* 396 * (Default resource limits were formerly declared here, but are now provided by 397 * the more general resource controls framework.) 398 */ 399 400 /* 401 * STREAMS tunables 402 */ 403 int nstrpush = 9; /* maximum # of modules/drivers on a stream */ 404 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */ 405 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */ 406 /* for `strmsgsz', zero means unlimited */ 407 /* 408 * Filesystem tunables 409 */ 410 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */ 411 int ngroups_max = NGROUPS_MAX_DEFAULT; 412 413 /* 414 * generic scheduling stuff 415 * 416 * Configurable parameters for RT and TS are in the respective 417 * scheduling class modules. 418 */ 419 420 pri_t maxclsyspri = MAXCLSYSPRI; 421 pri_t minclsyspri = MINCLSYSPRI; 422 char sys_name[] = "SYS"; 423 424 extern pri_t sys_init(); 425 extern classfuncs_t sys_classfuncs; 426 427 sclass_t sclass[] = { 428 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 0 }, 429 { "", NULL, NULL, NULL, 0 }, 430 { "", NULL, NULL, NULL, 0 }, 431 { "", NULL, NULL, NULL, 0 }, 432 { "", NULL, NULL, NULL, 0 }, 433 { "", NULL, NULL, NULL, 0 }, 434 { "", NULL, NULL, NULL, 0 }, 435 { "", NULL, NULL, NULL, 0 }, 436 { "", NULL, NULL, NULL, 0 }, 437 { "", NULL, NULL, NULL, 0 } 438 }; 439 440 int loaded_classes = 1; /* for loaded classes */ 441 kmutex_t class_lock; /* lock for class[] */ 442 443 int nclass = sizeof (sclass) / sizeof (sclass_t); 444 char initcls[] = "TS"; 445 char *defaultclass = initcls; 446 447 /* 448 * Tunable system parameters. 449 */ 450 451 /* 452 * The integers tune_* are done this way so that the tune 453 * data structure may be "tuned" if necessary from the /etc/system 454 * file. The tune data structure is initialized in param_init(); 455 */ 456 457 tune_t tune; 458 459 /* 460 * If freemem < t_getpgslow, then start to steal pages from processes. 461 */ 462 int tune_t_gpgslo = 25; 463 464 /* 465 * Rate at which fsflush is run, in seconds. 466 */ 467 #define DEFAULT_TUNE_T_FSFLUSHR 1 468 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 469 470 /* 471 * The minimum available resident (not swappable) memory to maintain 472 * in order to avoid deadlock. In pages. 473 */ 474 int tune_t_minarmem = 25; 475 476 /* 477 * The minimum available swappable memory to maintain in order to avoid 478 * deadlock. In pages. 479 */ 480 int tune_t_minasmem = 25; 481 482 int tune_t_flckrec = 512; /* max # of active frlocks */ 483 484 /* 485 * Number of currently available pages that cannot be 'locked' 486 * This is set in init_pages_pp_maximum, and must be initialized 487 * to zero here to detect an override in /etc/system 488 */ 489 pgcnt_t pages_pp_maximum = 0; 490 491 int boothowto; /* boot flags passed to kernel */ 492 struct var v; /* System Configuration Information */ 493 494 /* 495 * System Configuration Information 496 */ 497 498 /* 499 * The physical system's host identifier, expressed as a decimal string. 500 * Code should only directly access this value when writing to it (setting the 501 * physical system's host identifier). Code that reads the physical system's 502 * host identifier should use zone_get_hostid(NULL) instead. 503 */ 504 char hw_serial[HW_HOSTID_LEN] = "0"; 505 506 #if defined(__sparc) 507 508 /* 509 * On sparc machines, read hw_serial from the firmware at boot time 510 * and simply assert Sun is the hardware provider. Hmm. 511 */ 512 char architecture[] = "sparcv9"; 513 char architecture_32[] = "sparc"; 514 char hw_provider[] = "Sun_Microsystems"; 515 516 #elif defined(__i386) 517 518 /* 519 * On x86 machines, read hw_serial, hw_provider and srpc_domain from 520 * /etc/bootrc at boot time. 521 */ 522 char architecture[] = "i386"; 523 char architecture_32[] = "i386"; 524 char hw_provider[SYS_NMLN] = ""; 525 526 #elif defined(__amd64) 527 528 /* 529 * On amd64 machines, read hw_serial, hw_provider and srpc_domain from 530 * /etc/bootrc at boot time. 531 */ 532 char architecture[] = "amd64"; 533 char architecture_32[] = "i386"; 534 char hw_provider[SYS_NMLN] = ""; 535 536 #else 537 #error "unknown processor architecture" 538 #endif 539 540 char srpc_domain[SYS_NMLN] = ""; 541 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */ 542 543 /* Initialize isa_list */ 544 char *isa_list = architecture; 545 546 static pgcnt_t original_physmem = 0; 547 548 #define MIN_DEFAULT_MAXUSERS 8u 549 #define MAX_DEFAULT_MAXUSERS 2048u 550 #define MAX_MAXUSERS 4096u 551 552 void 553 param_preset(void) 554 { 555 original_physmem = physmem; 556 } 557 558 void 559 param_calc(int platform_max_nprocs) 560 { 561 /* 562 * Default to about one "user" per megabyte, taking into 563 * account both physical and virtual constraints. 564 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT) 565 * converts pages to megs without integer overflow. 566 */ 567 #if defined(__sparc) 568 if (physmem > original_physmem) { 569 physmem = original_physmem; 570 cmn_err(CE_NOTE, "physmem limited to %ld", physmem); 571 } 572 #endif 573 if (maxusers == 0) { 574 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT); 575 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20; 576 maxusers = MIN(MAX(MIN(physmegs, virtmegs), 577 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS); 578 } 579 if (maxusers > MAX_MAXUSERS) { 580 maxusers = MAX_MAXUSERS; 581 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS); 582 } 583 584 if (ngroups_max > NGROUPS_MAX_DEFAULT) 585 cmn_err(CE_WARN, "ngroups_max of %d > %d, NFS AUTH_SYS will" 586 " not work properly", ngroups_max, NGROUPS_MAX_DEFAULT); 587 588 #ifdef DEBUG 589 /* 590 * The purpose of maxusers is to prevent memory overcommit. 591 * DEBUG kernels take more space, so reduce maxusers a bit. 592 */ 593 maxusers = (3 * maxusers) / 4; 594 #endif 595 596 /* 597 * We need to dynamically change any variables now so that 598 * the setting of maxusers and pidmax propagate to the other 599 * variables that are dependent on them. 600 */ 601 if (reserved_procs == 0) 602 reserved_procs = 5; 603 if (pidmax < reserved_procs || pidmax > MAX_MAXPID) 604 maxpid = MAX_MAXPID; 605 else 606 maxpid = pidmax; 607 608 /* 609 * This allows platform-dependent code to constrain the maximum 610 * number of processes allowed in case there are e.g. VM limitations 611 * with how many contexts are available. 612 */ 613 if (max_nprocs == 0) 614 max_nprocs = (10 + 16 * maxusers); 615 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs) 616 max_nprocs = platform_max_nprocs; 617 if (max_nprocs > maxpid) 618 max_nprocs = maxpid; 619 620 if (maxuprc == 0) 621 maxuprc = (max_nprocs - reserved_procs); 622 } 623 624 void 625 param_init(void) 626 { 627 /* 628 * Set each individual element of struct var v to be the 629 * default value. This is done this way 630 * so that a user can set the assigned integer value in the 631 * /etc/system file *IF* tuning is needed. 632 */ 633 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */ 634 v.v_maxupttl = max_nprocs - reserved_procs; 635 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */ 636 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */ 637 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */ 638 639 /* 640 * Set each individual element of struct tune to be the 641 * default value. Each struct element This is done this way 642 * so that a user can set the assigned integer value in the 643 * /etc/system file *IF* tuning is needed. 644 */ 645 tune.t_gpgslo = tune_t_gpgslo; 646 tune.t_fsflushr = tune_t_fsflushr; 647 tune.t_minarmem = tune_t_minarmem; 648 tune.t_minasmem = tune_t_minasmem; 649 tune.t_flckrec = tune_t_flckrec; 650 651 /* 652 * Initialization for file descriptors to correct mistaken settings in 653 * /etc/system. Initialization of limits performed by resource control 654 * system. 655 */ 656 if (rlim_fd_cur > rlim_fd_max) 657 rlim_fd_cur = rlim_fd_max; 658 659 /* 660 * calculations needed if hz was set in /etc/system 661 */ 662 if (hires_tick) 663 hz = hires_hz; 664 665 tick_per_msec = hz / MILLISEC; 666 msec_per_tick = MILLISEC / hz; 667 usec_per_tick = MICROSEC / hz; 668 nsec_per_tick = NANOSEC / hz; 669 max_hres_adj = nsec_per_tick >> ADJ_SHIFT; 670 } 671 672 /* 673 * Validate tuneable parameters following /etc/system processing, 674 * but prior to param_init(). 675 */ 676 void 677 param_check(void) 678 { 679 #if defined(__x86) 680 if (physmem != original_physmem) { 681 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx" 682 " via /etc/system. Please use eeprom(1M) instead.", 683 physmem); 684 physmem = original_physmem; 685 } 686 #endif 687 if (ngroups_max < NGROUPS_UMIN || ngroups_max > NGROUPS_UMAX) 688 ngroups_max = NGROUPS_MAX_DEFAULT; 689 690 if (autoup <= 0) { 691 autoup = DEFAULT_AUTOUP; 692 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup); 693 } 694 695 if (tune_t_fsflushr <= 0) { 696 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR; 697 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d", 698 tune_t_fsflushr); 699 } 700 701 if (jump_pid < 0 || jump_pid >= pidmax) { 702 jump_pid = 0; 703 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored"); 704 } 705 706 if (snoop_interval < SNOOP_INTERVAL_MIN) { 707 snoop_interval = SNOOP_INTERVAL_DEFAULT; 708 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting" 709 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT); 710 } 711 } 712