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 * Copyright 2022 Garrett D'Amore <garrett@damore.org>
27 */
28
29 #include <sys/types.h>
30 #include <sys/time.h>
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/signal.h>
34 #include <sys/sysmacros.h>
35 #include <sys/cmn_err.h>
36 #include <sys/user.h>
37 #include <sys/proc.h>
38 #include <sys/task.h>
39 #include <sys/project.h>
40 #include <sys/klwp.h>
41 #include <sys/vnode.h>
42 #include <sys/file.h>
43 #include <sys/fcntl.h>
44 #include <sys/flock.h>
45 #include <sys/var.h>
46 #include <sys/stream.h>
47 #include <sys/strsubr.h>
48 #include <sys/conf.h>
49 #include <sys/class.h>
50 #include <sys/ts.h>
51 #include <sys/rt.h>
52 #include <sys/exec.h>
53 #include <sys/exechdr.h>
54 #include <sys/buf.h>
55 #include <sys/resource.h>
56 #include <vm/seg.h>
57 #include <vm/pvn.h>
58 #include <vm/seg_kmem.h>
59 #include <sys/vmparam.h>
60 #include <sys/machparam.h>
61 #include <sys/utsname.h>
62 #include <sys/kmem.h>
63 #include <sys/stack.h>
64 #include <sys/modctl.h>
65 #include <sys/fdbuffer.h>
66 #include <sys/cyclic_impl.h>
67 #include <sys/disp.h>
68 #include <sys/tuneable.h>
69 #include <sys/systeminfo.h>
70
71 #include <sys/vmem.h>
72 #include <sys/clock.h>
73 #include <sys/clock_impl.h>
74 #include <sys/serializer.h>
75
76 /*
77 * The following few lines describe generic things that must be compiled
78 * into the booted executable (unix) rather than genunix or any other
79 * module because they're required by crash dump readers, etc.
80 */
81 struct modctl modules; /* head of linked list of modules */
82 char *default_path; /* default module loading path */
83 struct swapinfo *swapinfo; /* protected by the swapinfo_lock */
84 proc_t *practive; /* active process list */
85 uint_t nproc; /* current number of processes */
86 proc_t p0; /* process 0 */
87 struct plock p0lock; /* p0's p_lock */
88 klwp_t lwp0; /* t0's lwp */
89 task_t *task0p; /* task 0 */
90 kproject_t *proj0p; /* location of project 0 */
91
92 /*
93 * The following are "implementation architecture" dependent constants made
94 * available here in the form of initialized data for use by "implementation
95 * architecture" independent modules. See machparam.h.
96 */
97 const unsigned long _pagesize = (unsigned long)PAGESIZE;
98 const unsigned int _pageshift = (unsigned int)PAGESHIFT;
99 const unsigned long _pageoffset = (unsigned long)PAGEOFFSET;
100 /*
101 * XXX - This value pagemask has to be a 64bit size because
102 * large file support uses this mask on offsets which are 64 bit size.
103 * using unsigned leaves the higher 32 bits value as zero thus
104 * corrupting offset calculations in the file system and VM.
105 */
106 const u_longlong_t _pagemask = (u_longlong_t)PAGEMASK;
107 const unsigned long _mmu_pagesize = (unsigned long)MMU_PAGESIZE;
108 const unsigned int _mmu_pageshift = (unsigned int)MMU_PAGESHIFT;
109 const unsigned long _mmu_pageoffset = (unsigned long)MMU_PAGEOFFSET;
110 const unsigned long _mmu_pagemask = (unsigned long)MMU_PAGEMASK;
111 uintptr_t _kernelbase = (uintptr_t)KERNELBASE;
112 uintptr_t _userlimit = (uintptr_t)USERLIMIT;
113 uintptr_t _userlimit32 = (uintptr_t)USERLIMIT32;
114 const uintptr_t _argsbase = (uintptr_t)ARGSBASE;
115 const unsigned int _diskrpm = (unsigned int)DISKRPM;
116 const unsigned long _pgthresh = (unsigned long)PGTHRESH;
117 const unsigned int _maxslp = (unsigned int)MAXSLP;
118 const unsigned long _maxhandspreadpages = (unsigned long)MAXHANDSPREADPAGES;
119 const int _ncpu = (int)NCPU;
120 const int _ncpu_log2 = (int)NCPU_LOG2;
121 const int _ncpu_p2 = (int)NCPU_P2;
122 const unsigned long _defaultstksz = (unsigned long)DEFAULTSTKSZ;
123 const unsigned int _nbpg = (unsigned int)MMU_PAGESIZE;
124
125 /*
126 * System parameter formulae.
127 *
128 * This file is copied into each directory where we compile
129 * the kernel; it should be modified there to suit local taste
130 * if necessary.
131 */
132
133 /*
134 * hz is 100, but we set hires_tick to get higher resolution clock behavior
135 * (currently defined to be 1000 hz). Higher values seem to work, but are not
136 * supported.
137 *
138 * This is configured via hires_tick to allow users to explicitly customize it
139 * to 0 should the need arise.
140 *
141 * If we do decide to play with higher values, remember that hz should
142 * satisfy the following constraints to avoid integer round-off problems:
143 *
144 * (1) hz should be in the range 100 <= hz <= MICROSEC. If hz exceeds
145 * MICROSEC, usec_per_tick will be zero and lots of stuff will break.
146 * Similarly, if hz < 100 then hz / 100 == 0 and stuff will break.
147 *
148 * (2) If hz <= 1000, it should be both a multiple of 100 and a
149 * divisor of 1000.
150 *
151 * (3) If hz > 1000, it should be both a multiple of 1000 and a
152 * divisor of MICROSEC.
153 *
154 * Thus the only reasonable values of hz (i.e. the values that won't
155 * cause roundoff error) are: 100, 200, 500, 1000, 2000, 4000, 5000,
156 * 8000, 10000, 20000, 25000, 40000, 50000, 100000, 125000, 200000,
157 * 250000, 500000, 1000000. As of this writing (1996) a clock rate
158 * of more than about 10 kHz seems utterly ridiculous, although
159 * this observation will no doubt seem quaintly amusing one day.
160 */
161 #define HIRES_HZ_DEFAULT 1000
162
163 int hz = HZ_DEFAULT;
164 int hires_hz = HIRES_HZ_DEFAULT;
165
166 int hires_tick = 1;
167 int cpu_decay_factor = 10; /* this is no longer tied to clock */
168 int max_hres_adj; /* maximum adjustment of hrtime per tick */
169 int tick_per_msec; /* clock ticks per millisecond (zero if hz < 1000) */
170
171 /*
172 * Milliseconds, Microseconds, and Nanoseconds per clock tick
173 *
174 * Note:
175 * msec_per_tick is zero if hz > 1000
176 */
177 int msec_per_tick;
178 int usec_per_tick;
179 int nsec_per_tick;
180
181 /*
182 * Time Resolution values. These are defined in condvar.h and initialized in
183 * param_init(). Consumers of cv_reltimedwait() and cv_reltimedwait_sig()
184 * need to specify how accurate the timeout argument should be through
185 * one of these values. The intention is to allow the underlying implementation
186 * to anticipate or defer the expiration of timeouts, preventing unnecessary
187 * wakeups by batch processing similarly expiring events.
188 */
189 time_res_t time_res[TR_COUNT];
190
191 /*
192 * Setting "snooping" to a non-zero value will cause a deadman panic if
193 * snoop_interval microseconds elapse without lbolt increasing. The default
194 * snoop_interval is 50 seconds.
195 */
196 #define SNOOP_INTERVAL_MIN (MICROSEC)
197 #define SNOOP_INTERVAL_DEFAULT (50 * MICROSEC)
198
199 int snooping = 0;
200 uint_t snoop_interval = SNOOP_INTERVAL_DEFAULT;
201
202 /*
203 * Tables of initialization functions, called from main().
204 */
205
206 extern void system_taskq_init(void);
207 extern void binit(void);
208 extern void space_init(void);
209 extern void dnlc_init(void);
210 extern void vfsinit(void);
211 extern void finit(void);
212 extern void strinit(void);
213 extern void flk_init(void);
214 extern void ftrace_init(void);
215 extern void softcall_init(void);
216 extern void ttyinit(void);
217 extern void schedctl_init(void);
218 extern void deadman_init(void);
219 extern void clock_timer_init(void);
220 extern void clock_realtime_init(void);
221 extern void clock_highres_init(void);
222 extern void clock_thread_init(void);
223 extern void clock_process_init(void);
224 extern void clock_tick_mp_init(void);
225 extern void cu_init(void);
226 extern void callout_mp_init(void);
227 extern void cpu_seq_tbl_init(void);
228
229 void (*init_tbl[])(void) = {
230 system_taskq_init,
231 binit,
232 space_init,
233 dnlc_init,
234 vfsinit,
235 finit,
236 strinit,
237 serializer_init,
238 softcall_init,
239 ttyinit,
240 as_init,
241 pvn_init,
242 anon_init,
243 segvn_init,
244 flk_init,
245 cpu_seq_tbl_init,
246 schedctl_init,
247 fdb_init,
248 deadman_init,
249 clock_timer_init,
250 clock_realtime_init,
251 clock_highres_init,
252 clock_thread_init,
253 clock_process_init,
254 NULL
255 };
256
257
258 #if defined(__sparc)
259 extern void siron_mp_init();
260 #endif
261
262 /*
263 * Any per cpu resources should be initialized via
264 * an entry in mp_init_tbl().
265 */
266 void (*mp_init_tbl[])(void) = {
267 ftrace_init,
268 cyclic_mp_init,
269 #if defined(__sparc)
270 siron_mp_init,
271 #endif
272 clock_tick_mp_init,
273 cu_init,
274 callout_mp_init,
275 0
276 };
277
278 int maxusers; /* kitchen-sink knob for dynamic configuration */
279
280 /*
281 * pidmax -- highest pid value assigned by the system
282 * Settable in /etc/system
283 */
284 int pidmax = DEFAULT_MAXPID;
285
286 /*
287 * jump_pid - if set, this value is where pid numbers should start
288 * after the first few system pids (0-3) are used. If 0, pids are
289 * chosen in the usual way. This variable can be used to quickly
290 * create large pids (by setting it to 100000, for example). pids
291 * less than this value will never be chosen.
292 */
293 pid_t jump_pid = DEFAULT_JUMPPID;
294
295 /*
296 * autoup -- used in struct var for dynamic config of the age a delayed-write
297 * buffer must be in seconds before bdflush will write it out.
298 */
299 #define DEFAULT_AUTOUP 30
300 int autoup = DEFAULT_AUTOUP;
301
302 /*
303 * bufhwm -- tuneable variable for struct var for v_bufhwm.
304 * high water mark for buffer cache mem usage in units of K bytes.
305 *
306 * bufhwm_pct -- ditto, but given in % of physmem.
307 */
308 int bufhwm = 0;
309 int bufhwm_pct = 0;
310
311 /*
312 * Process table.
313 */
314 int maxpid;
315 int max_nprocs; /* set in param_init() */
316 int maxuprc; /* set in param_init() */
317 int reserved_procs;
318 int nthread = 1;
319
320 /*
321 * UFS tunables
322 */
323 int ufs_ninode; /* declared here due to backwards compatibility */
324 int ndquot; /* declared here due to backwards compatibility */
325
326 /*
327 * Exec switch table. This is used by the generic exec module
328 * to switch out to the desired executable type, based on the
329 * magic number. The currently supported types are ELF, a.out
330 * (both NMAGIC and ZMAGIC), interpreter (#!) files,
331 * and Java executables.
332 */
333 /*
334 * Magic numbers
335 */
336 short elfmagic = 0x7f45;
337 short intpmagic = 0x2321;
338 short jmagic = 0x504b;
339
340 short nomagic = 0;
341
342 /*
343 * Magic strings
344 */
345 #define ELF32MAGIC_STRING "\x7f""ELF\x1"
346 #define ELF64MAGIC_STRING "\x7f""ELF\x2"
347 #define INTPMAGIC_STRING "#!"
348 #define JAVAMAGIC_STRING "PK\003\004"
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 char nomagicstr[] = NOMAGIC_STRING;
361
362 char *execswnames[] = {
363 "elfexec", /* Elf32 */
364 #ifdef _LP64
365 "elfexec", /* Elf64 */
366 #endif
367 "intpexec",
368 "shbinexec",
369 "javaexec",
370 NULL,
371 NULL,
372 NULL
373 };
374
375 struct execsw execsw[] = {
376 { elf32magicstr, 0, 5, NULL, NULL, NULL },
377 #ifdef _LP64
378 { elf64magicstr, 0, 5, NULL, NULL, NULL },
379 #endif
380 { intpmagicstr, 0, 2, NULL, NULL, NULL },
381 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL },
382 { javamagicstr, 0, 4, NULL, NULL, NULL },
383 { nomagicstr, 0, 0, NULL, NULL, NULL },
384 { nomagicstr, 0, 0, NULL, NULL, NULL },
385 { nomagicstr, 0, 0, NULL, NULL, NULL },
386 { nomagicstr, 0, 0, NULL, NULL, NULL }
387 };
388 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */
389 kmutex_t execsw_lock; /* Used for allocation of execsw entries */
390
391 /*
392 * symbols added to make changing proc.max-file-descriptor
393 * simple via /etc/system
394 */
395 #define RLIM_FD_CUR 0x10000
396 #define RLIM_FD_MAX 0x10000
397
398 uint_t rlim_fd_cur = RLIM_FD_CUR;
399 uint_t rlim_fd_max = RLIM_FD_MAX;
400
401 /*
402 * (Default resource limits were formerly declared here, but are now provided by
403 * the more general resource controls framework.)
404 */
405
406 /*
407 * STREAMS tunables
408 */
409 int nstrpush = 9; /* maximum # of modules/drivers on a stream */
410 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */
411 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */
412 /* for `strmsgsz', zero means unlimited */
413 /*
414 * Filesystem tunables
415 */
416 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */
417 int ngroups_max = NGROUPS_MAX_DEFAULT;
418
419 /*
420 * generic scheduling stuff
421 *
422 * Configurable parameters for RT and TS are in the respective
423 * scheduling class modules.
424 */
425
426 pri_t maxclsyspri = MAXCLSYSPRI;
427 pri_t minclsyspri = MINCLSYSPRI;
428 char sys_name[] = "SYS";
429
430 extern pri_t sys_init(id_t, int, classfuncs_t **);
431 extern classfuncs_t sys_classfuncs;
432
433 sclass_t sclass[] = {
434 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 0 },
435 { "", NULL, NULL, NULL, 0 },
436 { "", NULL, NULL, NULL, 0 },
437 { "", NULL, NULL, NULL, 0 },
438 { "", NULL, NULL, NULL, 0 },
439 { "", NULL, NULL, NULL, 0 },
440 { "", NULL, NULL, NULL, 0 },
441 { "", NULL, NULL, NULL, 0 },
442 { "", NULL, NULL, NULL, 0 },
443 { "", NULL, NULL, NULL, 0 }
444 };
445
446 int loaded_classes = 1; /* for loaded classes */
447 kmutex_t class_lock; /* lock for class[] */
448
449 int nclass = sizeof (sclass) / sizeof (sclass_t);
450 char initcls[] = "TS";
451 char *defaultclass = initcls;
452
453 /*
454 * Tunable system parameters.
455 */
456
457 /*
458 * The integers tune_* are done this way so that the tune
459 * data structure may be "tuned" if necessary from the /etc/system
460 * file. The tune data structure is initialized in param_init();
461 */
462
463 tune_t tune;
464
465 /*
466 * If freemem < t_getpgslow, then start to steal pages from processes.
467 */
468 int tune_t_gpgslo = 25;
469
470 /*
471 * Rate at which fsflush is run, in seconds.
472 */
473 #define DEFAULT_TUNE_T_FSFLUSHR 1
474 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR;
475
476 /*
477 * The minimum available resident (not swappable) memory to maintain
478 * in order to avoid deadlock. In pages.
479 */
480 int tune_t_minarmem = 25;
481
482 /*
483 * The minimum available swappable memory to maintain in order to avoid
484 * deadlock. In pages.
485 */
486 int tune_t_minasmem = 25;
487
488 int tune_t_flckrec = 512; /* max # of active frlocks */
489
490 /*
491 * Number of currently available pages that cannot be 'locked'
492 * This is set in init_pages_pp_maximum, and must be initialized
493 * to zero here to detect an override in /etc/system
494 */
495 pgcnt_t pages_pp_maximum = 0;
496
497 int boothowto; /* boot flags passed to kernel */
498 struct var v; /* System Configuration Information */
499
500 /*
501 * System Configuration Information
502 */
503
504 /*
505 * The physical system's host identifier, expressed as a decimal string.
506 * Code should only directly access this value when writing to it (setting the
507 * physical system's host identifier). Code that reads the physical system's
508 * host identifier should use zone_get_hostid(NULL) instead.
509 */
510 char hw_serial[HW_HOSTID_LEN] = "0";
511
512 #if defined(__sparc)
513
514 /*
515 * On sparc machines, read hw_serial from the firmware at boot time
516 * and simply assert Oracle is the hardware provider.
517 */
518 char architecture[] = "sparcv9";
519 char architecture_32[] = "sparc";
520 char hw_provider[] = "Oracle Corporation";
521
522 #elif defined(__amd64)
523
524 char architecture[] = "amd64";
525 char architecture_32[] = "i386";
526 char hw_provider[SYS_NMLN] = "";
527
528 #else
529 #error "unknown processor architecture"
530 #endif
531
532 char srpc_domain[SYS_NMLN] = "";
533 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */
534
535 /* Initialize isa_list */
536 char *isa_list = architecture;
537
538 static pgcnt_t original_physmem = 0;
539
540 #define MIN_DEFAULT_MAXUSERS 8u
541 #define MAX_DEFAULT_MAXUSERS 2048u
542 #define MAX_MAXUSERS 4096u
543
544 void
param_preset(void)545 param_preset(void)
546 {
547 original_physmem = physmem;
548 }
549
550 void
param_calc(int platform_max_nprocs)551 param_calc(int platform_max_nprocs)
552 {
553 /*
554 * Default to about one "user" per megabyte, taking into
555 * account both physical and virtual constraints.
556 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT)
557 * converts pages to megs without integer overflow.
558 */
559 #if defined(__sparc)
560 if (physmem > original_physmem) {
561 physmem = original_physmem;
562 cmn_err(CE_NOTE, "physmem limited to %ld", physmem);
563 }
564 #endif
565 if (maxusers == 0) {
566 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT);
567 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20;
568 maxusers = MIN(MAX(MIN(physmegs, virtmegs),
569 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS);
570 }
571 if (maxusers > MAX_MAXUSERS) {
572 maxusers = MAX_MAXUSERS;
573 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS);
574 }
575
576 #ifdef DEBUG
577 /*
578 * The purpose of maxusers is to prevent memory overcommit.
579 * DEBUG kernels take more space, so reduce maxusers a bit.
580 */
581 maxusers = (3 * maxusers) / 4;
582 #endif
583
584 /*
585 * We need to dynamically change any variables now so that
586 * the setting of maxusers and pidmax propagate to the other
587 * variables that are dependent on them.
588 */
589 if (reserved_procs == 0)
590 reserved_procs = 5;
591 if (pidmax < reserved_procs || pidmax > MAX_MAXPID)
592 maxpid = MAX_MAXPID;
593 else
594 maxpid = pidmax;
595
596 /*
597 * This allows platform-dependent code to constrain the maximum
598 * number of processes allowed in case there are e.g. VM limitations
599 * with how many contexts are available.
600 */
601 if (max_nprocs == 0)
602 max_nprocs = (10 + 16 * maxusers);
603 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs)
604 max_nprocs = platform_max_nprocs;
605 if (max_nprocs > maxpid)
606 max_nprocs = maxpid;
607
608 if (maxuprc == 0)
609 maxuprc = (max_nprocs - reserved_procs);
610 }
611
612 void
param_init(void)613 param_init(void)
614 {
615 /*
616 * Set each individual element of struct var v to be the
617 * default value. This is done this way
618 * so that a user can set the assigned integer value in the
619 * /etc/system file *IF* tuning is needed.
620 */
621 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */
622 v.v_maxupttl = max_nprocs - reserved_procs;
623 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */
624 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */
625 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */
626
627 /*
628 * Set each individual element of struct tune to be the
629 * default value. Each struct element 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 tune.t_gpgslo = tune_t_gpgslo;
634 tune.t_fsflushr = tune_t_fsflushr;
635 tune.t_minarmem = tune_t_minarmem;
636 tune.t_minasmem = tune_t_minasmem;
637 tune.t_flckrec = tune_t_flckrec;
638
639 /*
640 * Initialization for file descriptors to correct mistaken settings in
641 * /etc/system. Initialization of limits performed by resource control
642 * system.
643 */
644 if (rlim_fd_cur > rlim_fd_max)
645 rlim_fd_cur = rlim_fd_max;
646
647 /*
648 * calculations needed if hz was set in /etc/system
649 */
650 if (hires_tick)
651 hz = hires_hz;
652
653 tick_per_msec = hz / MILLISEC;
654 msec_per_tick = MILLISEC / hz;
655 usec_per_tick = MICROSEC / hz;
656 nsec_per_tick = NANOSEC / hz;
657 max_hres_adj = nsec_per_tick >> ADJ_SHIFT;
658
659 /*
660 * Consumers of relative timedwait functions must specify how accurately
661 * the given timeout must expire. This is currently TR_CLOCK_TICK for
662 * the vast majority of consumers, but nsec_per_tick becomes an
663 * artificial value in a tickless world. Each caller of such routines
664 * should re-evaluate their usage and specify the appropriate
665 * resolution.
666 */
667 time_res[TR_NANOSEC] = NANOSEC / NANOSEC;
668 time_res[TR_MICROSEC] = NANOSEC / MICROSEC;
669 time_res[TR_MILLISEC] = NANOSEC / MILLISEC;
670 time_res[TR_SEC] = NANOSEC / SEC;
671 time_res[TR_CLOCK_TICK] = nsec_per_tick;
672 }
673
674 /*
675 * Validate tuneable parameters following /etc/system processing,
676 * but prior to param_init().
677 */
678 void
param_check(void)679 param_check(void)
680 {
681 #if defined(__x86)
682 if (physmem != original_physmem) {
683 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx"
684 " via /etc/system. Please use eeprom(8) instead.",
685 physmem);
686 physmem = original_physmem;
687 }
688 #endif
689 if (ngroups_max < NGROUPS_UMIN)
690 ngroups_max = NGROUPS_UMIN;
691 if (ngroups_max > NGROUPS_UMAX)
692 ngroups_max = NGROUPS_UMAX;
693
694 /* If we have many groups then the ucred proto message also grows. */
695 if (ngroups_max > NGROUPS_OLDMAX &&
696 strctlsz < (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 1024) {
697 strctlsz = (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) +
698 1024;
699 }
700
701 if (autoup <= 0) {
702 autoup = DEFAULT_AUTOUP;
703 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup);
704 }
705
706 if (tune_t_fsflushr <= 0) {
707 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR;
708 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d",
709 tune_t_fsflushr);
710 }
711
712 if (jump_pid < 0 || jump_pid >= pidmax) {
713 jump_pid = 0;
714 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored");
715 }
716
717 if (snoop_interval < SNOOP_INTERVAL_MIN) {
718 snoop_interval = SNOOP_INTERVAL_DEFAULT;
719 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting"
720 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT);
721 }
722 }
723