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 (c) 1983, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2012 Milan Jurik. All rights reserved.
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 int _ncpu_log2 = (int)NCPU_LOG2;
118 const int _ncpu_p2 = (int)NCPU_P2;
119 const unsigned long _defaultstksz = (unsigned long)DEFAULTSTKSZ;
120 const unsigned int _nbpg = (unsigned int)MMU_PAGESIZE;
121
122 /*
123 * System parameter formulae.
124 *
125 * This file is copied into each directory where we compile
126 * the kernel; it should be modified there to suit local taste
127 * if necessary.
128 */
129
130 /*
131 * Default hz is 100, but if we set hires_tick we get higher resolution
132 * clock behavior (currently defined to be 1000 hz). Higher values seem
133 * to work, but are not supported.
134 *
135 * If we do decide to play with higher values, remember that hz should
136 * satisfy the following constraints to avoid integer round-off problems:
137 *
138 * (1) hz should be in the range 100 <= hz <= MICROSEC. If hz exceeds
139 * MICROSEC, usec_per_tick will be zero and lots of stuff will break.
140 * Similarly, if hz < 100 then hz / 100 == 0 and stuff will break.
141 *
142 * (2) If hz <= 1000, it should be both a multiple of 100 and a
143 * divisor of 1000.
144 *
145 * (3) If hz > 1000, it should be both a multiple of 1000 and a
146 * divisor of MICROSEC.
147 *
148 * Thus the only reasonable values of hz (i.e. the values that won't
149 * cause roundoff error) are: 100, 200, 500, 1000, 2000, 4000, 5000,
150 * 8000, 10000, 20000, 25000, 40000, 50000, 100000, 125000, 200000,
151 * 250000, 500000, 1000000. As of this writing (1996) a clock rate
152 * of more than about 10 kHz seems utterly ridiculous, although
153 * this observation will no doubt seem quaintly amusing one day.
154 */
155 #define HIRES_HZ_DEFAULT 1000
156
157 int hz = HZ_DEFAULT;
158 int hires_hz = HIRES_HZ_DEFAULT;
159
160 int hires_tick = 0;
161 int cpu_decay_factor = 10; /* this is no longer tied to clock */
162 int max_hres_adj; /* maximum adjustment of hrtime per tick */
163 int tick_per_msec; /* clock ticks per millisecond (zero if hz < 1000) */
164
165 /*
166 * Milliseconds, Microseconds, and Nanoseconds per clock tick
167 *
168 * Note:
169 * msec_per_tick is zero if hz > 1000
170 */
171 int msec_per_tick;
172 int usec_per_tick;
173 int nsec_per_tick;
174
175 /*
176 * Time Resolution values. These are defined in condvar.h and initialized in
177 * param_init(). Consumers of cv_reltimedwait() and cv_reltimedwait_sig()
178 * need to specify how accurate the timeout argument should be through
179 * one of these values. The intention is to allow the underlying implementation
180 * to anticipate or defer the expiration of timeouts, preventing unnecessary
181 * wakeups by batch processing similarly expiring events.
182 */
183 time_res_t time_res[TR_COUNT];
184
185 /*
186 * Setting "snooping" to a non-zero value will cause a deadman panic if
187 * snoop_interval microseconds elapse without lbolt increasing. The default
188 * snoop_interval is 50 seconds.
189 */
190 #define SNOOP_INTERVAL_MIN (MICROSEC)
191 #define SNOOP_INTERVAL_DEFAULT (50 * MICROSEC)
192
193 int snooping = 0;
194 uint_t snoop_interval = SNOOP_INTERVAL_DEFAULT;
195
196 /*
197 * Tables of initialization functions, called from main().
198 */
199
200 extern void system_taskq_init(void);
201 extern void binit(void);
202 extern void space_init(void);
203 extern void dnlc_init(void);
204 extern void vfsinit(void);
205 extern void finit(void);
206 extern void strinit(void);
207 extern void flk_init(void);
208 extern void ftrace_init(void);
209 extern void softcall_init(void);
210 extern void ttyinit(void);
211 extern void schedctl_init(void);
212 extern void deadman_init(void);
213 extern void clock_timer_init(void);
214 extern void clock_realtime_init(void);
215 extern void clock_highres_init(void);
216 extern void clock_tick_mp_init(void);
217 extern void cu_init(void);
218 extern void callout_mp_init(void);
219 extern void cpu_seq_tbl_init(void);
220
221 void (*init_tbl[])(void) = {
222 system_taskq_init,
223 binit,
224 space_init,
225 dnlc_init,
226 vfsinit,
227 finit,
228 strinit,
229 serializer_init,
230 softcall_init,
231 ttyinit,
232 as_init,
233 pvn_init,
234 anon_init,
235 segvn_init,
236 flk_init,
237 cpu_seq_tbl_init,
238 schedctl_init,
239 fdb_init,
240 deadman_init,
241 clock_timer_init,
242 clock_realtime_init,
243 clock_highres_init,
244 0
245 };
246
247
248 #if defined(__sparc)
249 extern void siron_mp_init();
250 #endif
251
252 /*
253 * Any per cpu resources should be initialized via
254 * an entry in mp_init_tbl().
255 */
256 void (*mp_init_tbl[])(void) = {
257 ftrace_init,
258 cyclic_mp_init,
259 #if defined(__sparc)
260 siron_mp_init,
261 #endif
262 clock_tick_mp_init,
263 cu_init,
264 callout_mp_init,
265 0
266 };
267
268 int maxusers; /* kitchen-sink knob for dynamic configuration */
269
270 /*
271 * pidmax -- highest pid value assigned by the system
272 * Settable in /etc/system
273 */
274 int pidmax = DEFAULT_MAXPID;
275
276 /*
277 * jump_pid - if set, this value is where pid numbers should start
278 * after the first few system pids (0-3) are used. If 0, pids are
279 * chosen in the usual way. This variable can be used to quickly
280 * create large pids (by setting it to 100000, for example). pids
281 * less than this value will never be chosen.
282 */
283 pid_t jump_pid = DEFAULT_JUMPPID;
284
285 /*
286 * autoup -- used in struct var for dynamic config of the age a delayed-write
287 * buffer must be in seconds before bdflush will write it out.
288 */
289 #define DEFAULT_AUTOUP 30
290 int autoup = DEFAULT_AUTOUP;
291
292 /*
293 * bufhwm -- tuneable variable for struct var for v_bufhwm.
294 * high water mark for buffer cache mem usage in units of K bytes.
295 *
296 * bufhwm_pct -- ditto, but given in % of physmem.
297 */
298 int bufhwm = 0;
299 int bufhwm_pct = 0;
300
301 /*
302 * Process table.
303 */
304 int maxpid;
305 int max_nprocs; /* set in param_init() */
306 int maxuprc; /* set in param_init() */
307 int reserved_procs;
308 int nthread = 1;
309
310 /*
311 * UFS tunables
312 */
313 int ufs_ninode; /* declared here due to backwards compatibility */
314 int ndquot; /* declared here due to backwards compatibility */
315
316 /*
317 * Exec switch table. This is used by the generic exec module
318 * to switch out to the desired executable type, based on the
319 * magic number. The currently supported types are ELF, a.out
320 * (both NMAGIC and ZMAGIC), interpreter (#!) files,
321 * and Java executables.
322 */
323 /*
324 * Magic numbers
325 */
326 short elfmagic = 0x7f45;
327 short intpmagic = 0x2321;
328 short jmagic = 0x504b;
329
330 #if defined(__sparc)
331 short aout_nmagic = NMAGIC;
332 short aout_zmagic = ZMAGIC;
333 short aout_omagic = OMAGIC;
334 #endif
335 short nomagic = 0;
336
337 /*
338 * Magic strings
339 */
340 #define ELF32MAGIC_STRING "\x7f""ELF\x1"
341 #define ELF64MAGIC_STRING "\x7f""ELF\x2"
342 #define INTPMAGIC_STRING "#!"
343 #define JAVAMAGIC_STRING "PK\003\004"
344 #define AOUT_OMAGIC_STRING "\x1""\x07" /* 0407 */
345 #define AOUT_NMAGIC_STRING "\x1""\x08" /* 0410 */
346 #define AOUT_ZMAGIC_STRING "\x1""\x0b" /* 0413 */
347 #define NOMAGIC_STRING ""
348
349 #define SHBIN_CNTL(x) ((x)&037)
350 #define SHBINMAGIC_STRING {SHBIN_CNTL('k'), SHBIN_CNTL('s'), SHBIN_CNTL('h'), 0}
351 #define SHBINMAGIC_LEN 4
352
353 char elf32magicstr[] = ELF32MAGIC_STRING;
354 char elf64magicstr[] = ELF64MAGIC_STRING;
355 char intpmagicstr[] = INTPMAGIC_STRING;
356 char shbinmagicstr[] = SHBINMAGIC_STRING;
357 char javamagicstr[] = JAVAMAGIC_STRING;
358 #if defined(__sparc)
359 char aout_nmagicstr[] = AOUT_NMAGIC_STRING;
360 char aout_zmagicstr[] = AOUT_ZMAGIC_STRING;
361 char aout_omagicstr[] = AOUT_OMAGIC_STRING;
362 #endif
363 char nomagicstr[] = NOMAGIC_STRING;
364
365 char *execswnames[] = {
366 "elfexec", /* Elf32 */
367 #ifdef _LP64
368 "elfexec", /* Elf64 */
369 #endif
370 "intpexec",
371 "shbinexec",
372 "javaexec",
373 #if defined(__sparc)
374 "aoutexec",
375 "aoutexec",
376 "aoutexec",
377 #endif
378 NULL,
379 NULL,
380 NULL
381 };
382
383 struct execsw execsw[] = {
384 { elf32magicstr, 0, 5, NULL, NULL, NULL },
385 #ifdef _LP64
386 { elf64magicstr, 0, 5, NULL, NULL, NULL },
387 #endif
388 { intpmagicstr, 0, 2, NULL, NULL, NULL },
389 { shbinmagicstr, 0, SHBINMAGIC_LEN, NULL, NULL, NULL },
390 { javamagicstr, 0, 4, NULL, NULL, NULL },
391 #if defined(__sparc)
392 { aout_zmagicstr, 2, 2, NULL, NULL, NULL },
393 { aout_nmagicstr, 2, 2, NULL, NULL, NULL },
394 { aout_omagicstr, 2, 2, NULL, NULL, NULL },
395 #endif
396 { nomagicstr, 0, 0, NULL, NULL, NULL },
397 { nomagicstr, 0, 0, NULL, NULL, NULL },
398 { nomagicstr, 0, 0, NULL, NULL, NULL },
399 { nomagicstr, 0, 0, NULL, NULL, NULL }
400 };
401 int nexectype = sizeof (execsw) / sizeof (execsw[0]); /* # of exec types */
402 kmutex_t execsw_lock; /* Used for allocation of execsw entries */
403
404 /*
405 * symbols added to make changing max-file-descriptors
406 * simple via /etc/system
407 */
408 #define RLIM_FD_CUR 0x100
409 #define RLIM_FD_MAX 0x10000
410
411 uint_t rlim_fd_cur = RLIM_FD_CUR;
412 uint_t rlim_fd_max = RLIM_FD_MAX;
413
414 /*
415 * (Default resource limits were formerly declared here, but are now provided by
416 * the more general resource controls framework.)
417 */
418
419 /*
420 * STREAMS tunables
421 */
422 int nstrpush = 9; /* maximum # of modules/drivers on a stream */
423 ssize_t strctlsz = 1024; /* maximum size of user-generated M_PROTO */
424 ssize_t strmsgsz = 0x10000; /* maximum size of user-generated M_DATA */
425 /* for `strmsgsz', zero means unlimited */
426 /*
427 * Filesystem tunables
428 */
429 int rstchown = 1; /* POSIX_CHOWN_RESTRICTED is enabled */
430 int ngroups_max = NGROUPS_MAX_DEFAULT;
431
432 /*
433 * generic scheduling stuff
434 *
435 * Configurable parameters for RT and TS are in the respective
436 * scheduling class modules.
437 */
438
439 pri_t maxclsyspri = MAXCLSYSPRI;
440 pri_t minclsyspri = MINCLSYSPRI;
441 char sys_name[] = "SYS";
442
443 extern pri_t sys_init(id_t, int, classfuncs_t **);
444 extern classfuncs_t sys_classfuncs;
445
446 sclass_t sclass[] = {
447 { "SYS", sys_init, &sys_classfuncs, STATIC_SCHED, 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 { "", NULL, NULL, NULL, 0 },
454 { "", NULL, NULL, NULL, 0 },
455 { "", NULL, NULL, NULL, 0 },
456 { "", NULL, NULL, NULL, 0 }
457 };
458
459 int loaded_classes = 1; /* for loaded classes */
460 kmutex_t class_lock; /* lock for class[] */
461
462 int nclass = sizeof (sclass) / sizeof (sclass_t);
463 char initcls[] = "TS";
464 char *defaultclass = initcls;
465
466 /*
467 * Tunable system parameters.
468 */
469
470 /*
471 * The integers tune_* are done this way so that the tune
472 * data structure may be "tuned" if necessary from the /etc/system
473 * file. The tune data structure is initialized in param_init();
474 */
475
476 tune_t tune;
477
478 /*
479 * If freemem < t_getpgslow, then start to steal pages from processes.
480 */
481 int tune_t_gpgslo = 25;
482
483 /*
484 * Rate at which fsflush is run, in seconds.
485 */
486 #define DEFAULT_TUNE_T_FSFLUSHR 1
487 int tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR;
488
489 /*
490 * The minimum available resident (not swappable) memory to maintain
491 * in order to avoid deadlock. In pages.
492 */
493 int tune_t_minarmem = 25;
494
495 /*
496 * The minimum available swappable memory to maintain in order to avoid
497 * deadlock. In pages.
498 */
499 int tune_t_minasmem = 25;
500
501 int tune_t_flckrec = 512; /* max # of active frlocks */
502
503 /*
504 * Number of currently available pages that cannot be 'locked'
505 * This is set in init_pages_pp_maximum, and must be initialized
506 * to zero here to detect an override in /etc/system
507 */
508 pgcnt_t pages_pp_maximum = 0;
509
510 int boothowto; /* boot flags passed to kernel */
511 struct var v; /* System Configuration Information */
512
513 /*
514 * System Configuration Information
515 */
516
517 /*
518 * The physical system's host identifier, expressed as a decimal string.
519 * Code should only directly access this value when writing to it (setting the
520 * physical system's host identifier). Code that reads the physical system's
521 * host identifier should use zone_get_hostid(NULL) instead.
522 */
523 char hw_serial[HW_HOSTID_LEN] = "0";
524
525 #if defined(__sparc)
526
527 /*
528 * On sparc machines, read hw_serial from the firmware at boot time
529 * and simply assert Oracle is the hardware provider.
530 */
531 char architecture[] = "sparcv9";
532 char architecture_32[] = "sparc";
533 char hw_provider[] = "Oracle Corporation";
534
535 #elif defined(__i386)
536
537 /*
538 * On x86 machines, read hw_serial, hw_provider and srpc_domain from
539 * /etc/bootrc at boot time.
540 */
541 char architecture[] = "i386";
542 char architecture_32[] = "i386";
543 char hw_provider[SYS_NMLN] = "";
544
545 #elif defined(__amd64)
546
547 /*
548 * On amd64 machines, read hw_serial, hw_provider and srpc_domain from
549 * /etc/bootrc at boot time.
550 */
551 char architecture[] = "amd64";
552 char architecture_32[] = "i386";
553 char hw_provider[SYS_NMLN] = "";
554
555 #else
556 #error "unknown processor architecture"
557 #endif
558
559 char srpc_domain[SYS_NMLN] = "";
560 char platform[SYS_NMLN] = ""; /* read from the devinfo root node */
561
562 /* Initialize isa_list */
563 char *isa_list = architecture;
564
565 static pgcnt_t original_physmem = 0;
566
567 #define MIN_DEFAULT_MAXUSERS 8u
568 #define MAX_DEFAULT_MAXUSERS 2048u
569 #define MAX_MAXUSERS 4096u
570
571 void
572 param_preset(void)
573 {
574 original_physmem = physmem;
575 }
576
577 void
578 param_calc(int platform_max_nprocs)
579 {
580 /*
581 * Default to about one "user" per megabyte, taking into
582 * account both physical and virtual constraints.
583 * Note: 2^20 is a meg; shifting right by (20 - PAGESHIFT)
584 * converts pages to megs without integer overflow.
585 */
586 #if defined(__sparc)
587 if (physmem > original_physmem) {
588 physmem = original_physmem;
589 cmn_err(CE_NOTE, "physmem limited to %ld", physmem);
590 }
591 #endif
592 if (maxusers == 0) {
593 pgcnt_t physmegs = physmem >> (20 - PAGESHIFT);
594 pgcnt_t virtmegs = vmem_size(heap_arena, VMEM_FREE) >> 20;
595 maxusers = MIN(MAX(MIN(physmegs, virtmegs),
596 MIN_DEFAULT_MAXUSERS), MAX_DEFAULT_MAXUSERS);
597 }
598 if (maxusers > MAX_MAXUSERS) {
599 maxusers = MAX_MAXUSERS;
600 cmn_err(CE_NOTE, "maxusers limited to %d", MAX_MAXUSERS);
601 }
602
603 if (ngroups_max > NGROUPS_MAX_DEFAULT)
604 cmn_err(CE_WARN, "ngroups_max of %d > %d, NFS AUTH_SYS will"
605 " not work properly", ngroups_max, NGROUPS_MAX_DEFAULT);
606
607 #ifdef DEBUG
608 /*
609 * The purpose of maxusers is to prevent memory overcommit.
610 * DEBUG kernels take more space, so reduce maxusers a bit.
611 */
612 maxusers = (3 * maxusers) / 4;
613 #endif
614
615 /*
616 * We need to dynamically change any variables now so that
617 * the setting of maxusers and pidmax propagate to the other
618 * variables that are dependent on them.
619 */
620 if (reserved_procs == 0)
621 reserved_procs = 5;
622 if (pidmax < reserved_procs || pidmax > MAX_MAXPID)
623 maxpid = MAX_MAXPID;
624 else
625 maxpid = pidmax;
626
627 /*
628 * This allows platform-dependent code to constrain the maximum
629 * number of processes allowed in case there are e.g. VM limitations
630 * with how many contexts are available.
631 */
632 if (max_nprocs == 0)
633 max_nprocs = (10 + 16 * maxusers);
634 if (platform_max_nprocs > 0 && max_nprocs > platform_max_nprocs)
635 max_nprocs = platform_max_nprocs;
636 if (max_nprocs > maxpid)
637 max_nprocs = maxpid;
638
639 if (maxuprc == 0)
640 maxuprc = (max_nprocs - reserved_procs);
641 }
642
643 void
644 param_init(void)
645 {
646 /*
647 * Set each individual element of struct var v to be the
648 * default value. This is done this way
649 * so that a user can set the assigned integer value in the
650 * /etc/system file *IF* tuning is needed.
651 */
652 v.v_proc = max_nprocs; /* v_proc - max # of processes system wide */
653 v.v_maxupttl = max_nprocs - reserved_procs;
654 v.v_maxsyspri = (int)maxclsyspri; /* max global pri for sysclass */
655 v.v_maxup = MIN(maxuprc, v.v_maxupttl); /* max procs per user */
656 v.v_autoup = autoup; /* v_autoup - delay for delayed writes */
657
658 /*
659 * Set each individual element of struct tune to be the
660 * default value. Each struct element This is done this way
661 * so that a user can set the assigned integer value in the
662 * /etc/system file *IF* tuning is needed.
663 */
664 tune.t_gpgslo = tune_t_gpgslo;
665 tune.t_fsflushr = tune_t_fsflushr;
666 tune.t_minarmem = tune_t_minarmem;
667 tune.t_minasmem = tune_t_minasmem;
668 tune.t_flckrec = tune_t_flckrec;
669
670 /*
671 * Initialization for file descriptors to correct mistaken settings in
672 * /etc/system. Initialization of limits performed by resource control
673 * system.
674 */
675 if (rlim_fd_cur > rlim_fd_max)
676 rlim_fd_cur = rlim_fd_max;
677
678 /*
679 * calculations needed if hz was set in /etc/system
680 */
681 if (hires_tick)
682 hz = hires_hz;
683
684 tick_per_msec = hz / MILLISEC;
685 msec_per_tick = MILLISEC / hz;
686 usec_per_tick = MICROSEC / hz;
687 nsec_per_tick = NANOSEC / hz;
688 max_hres_adj = nsec_per_tick >> ADJ_SHIFT;
689
690 /*
691 * Consumers of relative timedwait functions must specify how accurately
692 * the given timeout must expire. This is currently TR_CLOCK_TICK for
693 * the vast majority of consumers, but nsec_per_tick becomes an
694 * artificial value in a tickless world. Each caller of such routines
695 * should re-evaluate their usage and specify the appropriate
696 * resolution.
697 */
698 time_res[TR_NANOSEC] = NANOSEC / NANOSEC;
699 time_res[TR_MICROSEC] = NANOSEC / MICROSEC;
700 time_res[TR_MILLISEC] = NANOSEC / MILLISEC;
701 time_res[TR_SEC] = NANOSEC / SEC;
702 time_res[TR_CLOCK_TICK] = nsec_per_tick;
703 }
704
705 /*
706 * Validate tuneable parameters following /etc/system processing,
707 * but prior to param_init().
708 */
709 void
710 param_check(void)
711 {
712 #if defined(__x86)
713 if (physmem != original_physmem) {
714 cmn_err(CE_NOTE, "physmem cannot be modified to 0x%lx"
715 " via /etc/system. Please use eeprom(1M) instead.",
716 physmem);
717 physmem = original_physmem;
718 }
719 #endif
720 if (ngroups_max < NGROUPS_UMIN)
721 ngroups_max = NGROUPS_UMIN;
722 if (ngroups_max > NGROUPS_UMAX)
723 ngroups_max = NGROUPS_UMAX;
724
725 /* If we have many groups then the ucred proto message also grows. */
726 if (ngroups_max > NGROUPS_OLDMAX &&
727 strctlsz < (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) + 1024) {
728 strctlsz = (ngroups_max - NGROUPS_OLDMAX) * sizeof (gid_t) +
729 1024;
730 }
731
732 if (autoup <= 0) {
733 autoup = DEFAULT_AUTOUP;
734 cmn_err(CE_WARN, "autoup <= 0; defaulting to %d", autoup);
735 }
736
737 if (tune_t_fsflushr <= 0) {
738 tune_t_fsflushr = DEFAULT_TUNE_T_FSFLUSHR;
739 cmn_err(CE_WARN, "tune_t_fsflushr <= 0; defaulting to %d",
740 tune_t_fsflushr);
741 }
742
743 if (jump_pid < 0 || jump_pid >= pidmax) {
744 jump_pid = 0;
745 cmn_err(CE_WARN, "jump_pid < 0 or >= pidmax; ignored");
746 }
747
748 if (snoop_interval < SNOOP_INTERVAL_MIN) {
749 snoop_interval = SNOOP_INTERVAL_DEFAULT;
750 cmn_err(CE_WARN, "snoop_interval < minimum (%d); defaulting"
751 " to %d", SNOOP_INTERVAL_MIN, SNOOP_INTERVAL_DEFAULT);
752 }
753 }