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 proc.max-file-descriptor
408 * simple via /etc/system
409 */
410 #define RLIM_FD_CUR 0x10000
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 }