#include <sys/cdefs.h>
#include "opt_param.h"
#include "opt_msgbuf.h"
#include "opt_maxphys.h"
#include "opt_maxusers.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/msgbuf.h>
#include <sys/sysctl.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>

Include dependency graph for subr_param.c:

Macros
#define	HZ 1000

#define	HZ_VM 100

#define	NPROC (20 + 16 * maxusers)

#define	NBUF 0

#define	MAXFILES (40 + 32 * maxusers)

Functions
	__FBSDID ("$FreeBSD$")

static int	sysctl_kern_vm_guest (SYSCTL_HANDLER_ARGS)

	SYSCTL_INT (_kern, OID_AUTO, hz, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &hz, 0, "Number of clock ticks per second")

	SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &nbuf, 0, "Number of buffers in the buffer cache")

	SYSCTL_INT (_kern, OID_AUTO, nswbuf, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &nswbuf, 0, "Number of swap buffers")

	SYSCTL_INT (_kern, OID_AUTO, msgbufsize, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &msgbufsize, 0, "Size of the kernel message buffer")

	SYSCTL_LONG (_kern, OID_AUTO, maxswzone, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &maxswzone, 0, "Maximum memory for swap metadata")

	SYSCTL_LONG (_kern, OID_AUTO, maxbcache, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &maxbcache, 0, "Maximum value of vfs.maxbufspace")

	SYSCTL_INT (_kern, OID_AUTO, bio_transient_maxcnt, CTLFLAG_RDTUN\|CTLFLAG_NOFETCH, &bio_transient_maxcnt, 0, "Maximum number of transient BIOs mappings")

	SYSCTL_ULONG (_kern, OID_AUTO, maxtsiz, CTLFLAG_RWTUN\|CTLFLAG_NOFETCH, &maxtsiz, 0, "Maximum text size")

	SYSCTL_ULONG (_kern, OID_AUTO, dfldsiz, CTLFLAG_RWTUN\|CTLFLAG_NOFETCH, &dfldsiz, 0, "Initial data size limit")

	SYSCTL_ULONG (_kern, OID_AUTO, maxdsiz, CTLFLAG_RWTUN\|CTLFLAG_NOFETCH, &maxdsiz, 0, "Maximum data size")

	SYSCTL_ULONG (_kern, OID_AUTO, dflssiz, CTLFLAG_RWTUN\|CTLFLAG_NOFETCH, &dflssiz, 0, "Initial stack size limit")

	SYSCTL_ULONG (_kern, OID_AUTO, maxssiz, CTLFLAG_RWTUN\|CTLFLAG_NOFETCH, &maxssiz, 0, "Maximum stack size")

	SYSCTL_ULONG (_kern, OID_AUTO, sgrowsiz, CTLFLAG_RWTUN\|CTLFLAG_NOFETCH, &sgrowsiz, 0, "Amount to grow stack on a stack fault")

	SYSCTL_PROC (_kern, OID_AUTO, vm_guest, CTLFLAG_RD\|CTLTYPE_STRING\|CTLFLAG_MPSAFE, NULL, 0, sysctl_kern_vm_guest, "A", "Virtual machine guest detected?")

	CTASSERT (nitems(vm_guest_sysctl_names) - 1==VM_LAST)

void	init_param1 (void)

void	init_param2 (long physpages)

Variables
int	hz

int	tick

struct bintime	tick_bt

sbintime_t	tick_sbt

int	maxusers

int	maxproc

int	maxprocperuid

int	maxfiles

int	maxfilesperproc

int	msgbufsize

int	nbuf

int	bio_transient_maxcnt

int	ngroups_max

int	nswbuf

pid_t	pid_max = PID_MAX

u_long	maxswzone

u_long	maxbcache

u_long	maxpipekva

u_long	maxphys

int	vm_guest = VM_GUEST_NO

u_long	maxtsiz

u_long	dfldsiz

u_long	maxdsiz

u_long	dflssiz

u_long	maxssiz

u_long	sgrowsiz

static const char *const	vm_guest_sysctl_names []

Macro Definition Documentation

◆ HZ

#define HZ 1000

Definition at line 66 of file subr_param.c.

◆ HZ_VM

#define HZ_VM 100

Definition at line 68 of file subr_param.c.

◆ MAXFILES

#define MAXFILES (40 + 32 * maxusers)

Definition at line 80 of file subr_param.c.

◆ NBUF

#define NBUF 0

Definition at line 77 of file subr_param.c.

◆ NPROC

#define NPROC (20 + 16 * maxusers)

Definition at line 75 of file subr_param.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ CTASSERT()

CTASSERT ( nitems(vm_guest_sysctl_names) - 1 = =VM_LAST )

◆ init_param1()

void init_param1 ( void )

Definition at line 166 of file subr_param.c.

References dfldsiz, dflssiz, HZ, hz, HZ_VM, kstack_pages, maxbcache, maxdsiz, maxssiz, maxswzone, maxtsiz, msgbufsize, ngroups_max, pid_max, sgrowsiz, tick, tick_bt, tick_sbt, ticks, vm_guest, and vn_lock_pair_pause_max.

◆ init_param2()

void init_param2 ( long physpages )

Definition at line 241 of file subr_param.c.

References bio_transient_maxcnt, MAXFILES, maxfiles, maxfilesperproc, maxphys, maxpipekva, maxproc, maxprocperuid, maxusers, NBUF, nbuf, NPROC, nswbuf, and pid_max.

◆ SYSCTL_INT() [1/5]

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		bio_transient_maxcnt	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	bio_transient_maxcnt,
		0	,
		"Maximum number of transient BIOs mappings"
	)

◆ SYSCTL_INT() [2/5]

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		hz	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	hz,
		0	,
		"Number of clock ticks per second"
	)

◆ SYSCTL_INT() [3/5]

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		msgbufsize	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	msgbufsize,
		0	,
		"Size of the kernel message buffer"
	)

◆ SYSCTL_INT() [4/5]

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		nbuf	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	nbuf,
		0	,
		"Number of buffers in the buffer cache"
	)

◆ SYSCTL_INT() [5/5]

SYSCTL_INT	(	_kern	,
		OID_AUTO	,
		nswbuf	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	nswbuf,
		0	,
		"Number of swap buffers"
	)

◆ sysctl_kern_vm_guest()

static int sysctl_kern_vm_guest ( SYSCTL_HANDLER_ARGS )

static

Definition at line 331 of file subr_param.c.

References vm_guest, and vm_guest_sysctl_names.

◆ SYSCTL_LONG() [1/2]

SYSCTL_LONG	(	_kern	,
		OID_AUTO	,
		maxbcache	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	maxbcache,
		0	,
		"Maximum value of vfs.maxbufspace"
	)

◆ SYSCTL_LONG() [2/2]

SYSCTL_LONG	(	_kern	,
		OID_AUTO	,
		maxswzone	,
		CTLFLAG_RDTUN\|	CTLFLAG_NOFETCH,
		&	maxswzone,
		0	,
		"Maximum memory for swap metadata"
	)

◆ SYSCTL_PROC()

SYSCTL_PROC	(	_kern	,
		OID_AUTO	,
		vm_guest	,
		CTLFLAG_RD\|CTLTYPE_STRING\|	CTLFLAG_MPSAFE,
		NULL	,
		0	,
		sysctl_kern_vm_guest	,
		"A"	,
		"Virtual machine guest detected?"
	)

◆ SYSCTL_ULONG() [1/6]

SYSCTL_ULONG	(	_kern	,
		OID_AUTO	,
		dfldsiz	,
		CTLFLAG_RWTUN\|	CTLFLAG_NOFETCH,
		&	dfldsiz,
		0	,
		"Initial data size limit"
	)

◆ SYSCTL_ULONG() [2/6]

SYSCTL_ULONG	(	_kern	,
		OID_AUTO	,
		dflssiz	,
		CTLFLAG_RWTUN\|	CTLFLAG_NOFETCH,
		&	dflssiz,
		0	,
		"Initial stack size limit"
	)

◆ SYSCTL_ULONG() [3/6]

SYSCTL_ULONG	(	_kern	,
		OID_AUTO	,
		maxdsiz	,
		CTLFLAG_RWTUN\|	CTLFLAG_NOFETCH,
		&	maxdsiz,
		0	,
		"Maximum data size"
	)

◆ SYSCTL_ULONG() [4/6]

SYSCTL_ULONG	(	_kern	,
		OID_AUTO	,
		maxssiz	,
		CTLFLAG_RWTUN\|	CTLFLAG_NOFETCH,
		&	maxssiz,
		0	,
		"Maximum stack size"
	)

◆ SYSCTL_ULONG() [5/6]

SYSCTL_ULONG	(	_kern	,
		OID_AUTO	,
		maxtsiz	,
		CTLFLAG_RWTUN\|	CTLFLAG_NOFETCH,
		&	maxtsiz,
		0	,
		"Maximum text size"
	)

◆ SYSCTL_ULONG() [6/6]

SYSCTL_ULONG	(	_kern	,
		OID_AUTO	,
		sgrowsiz	,
		CTLFLAG_RWTUN\|	CTLFLAG_NOFETCH,
		&	sgrowsiz,
		0	,
		"Amount to grow stack on a stack fault"
	)

Variable Documentation

◆ bio_transient_maxcnt

int bio_transient_maxcnt

Definition at line 96 of file subr_param.c.

Referenced by init_param2(), and kern_vfs_bio_buffer_alloc().

◆ dfldsiz

u_long dfldsiz

Definition at line 106 of file subr_param.c.

Referenced by init_param1(), and proc0_init().

◆ dflssiz

u_long dflssiz

Definition at line 108 of file subr_param.c.

Referenced by init_param1(), and proc0_init().

◆ hz

int hz

Definition at line 85 of file subr_param.c.

Referenced by acct_process(), acct_thread(), aio_proc_rundown(), boot_run_interrupt_driven_config_hooks(), buf_daemon(), buf_daemon_shutdown(), bufspace_daemon(), bufspace_daemon_shutdown(), config_intrhook_drain(), counter_ratecheck(), cpu_initclocks_bsp(), destroy_dev_drain(), destroy_devl(), fail_point_drain(), fail_point_sleep(), fill_kinfo_proc_only(), fill_kinfo_thread(), fork1(), fork_rfppwait(), getnextcpuevent(), hardclock_device_poll(), init_param1(), initclocks(), inittimecounter(), kern_clock_getres(), kern_msgsnd(), kproc_shutdown(), ksched_attach(), kthread_shutdown(), ktls_buffer_alloc(), netisr_pollmore(), parse_dir_ask(), parse_mount(), periodic_resettodr(), pffasttimo(), pfslowtimo(), poll_idle(), ppsratecheck(), reg_frac_sysctl(), sched_initticks(), sched_pctcpu(), sched_rr_interval(), sched_sync(), schedcpu_thread(), setuptimer(), sleepinit(), so_linger_set(), soclose(), sosetopt(), start_periodic_resettodr(), statclock(), syscall_thread_drain(), sysctl_kern_clockrate(), sysctl_kern_quantum(), sysctl_msec_to_ticks(), sysctl_resettodr_period(), tc_adjprecision(), tc_init(), thread_reap_callout_cb(), threadinit(), tty_drain(), tty_timedwait(), ttydisc_read_raw_read_timer(), tvtohz(), vfs_mount_init(), vfs_mountroot_wait(), vfs_mountroot_wait_if_neccessary(), vmem_start_callout(), vn_alloc_hard(), vn_fsync_buf(), vnlru_proc(), and watchdog_config().

◆ maxbcache

u_long maxbcache

Definition at line 101 of file subr_param.c.

Referenced by init_param1(), and kern_vfs_bio_buffer_alloc().

◆ maxdsiz

u_long maxdsiz

Definition at line 107 of file subr_param.c.

Referenced by init_param1(), kern_proc_setrlimit(), and proc0_init().

◆ maxfiles

int maxfiles

Definition at line 92 of file subr_param.c.

Referenced by _falloc_noinstall(), callout_callwheel_init(), init_maxsockets(), init_param2(), proc0_init(), and sysctl_maxsockets().

◆ maxfilesperproc

int maxfilesperproc

Definition at line 93 of file subr_param.c.

Referenced by getmaxfd(), init_param2(), kern_poll_maxfds(), and kern_proc_setrlimit().

◆ maxphys

u_long maxphys

Definition at line 103 of file subr_param.c.

Referenced by aio_biocleanup(), aio_qbio(), bufinit(), init_param2(), kern_vfs_bio_buffer_alloc(), maxbcachebuf_adjust(), physio(), vfs_bio_awrite(), vn_sendfile(), and vop_stdallocate().

◆ maxpipekva

u_long maxpipekva

Definition at line 102 of file subr_param.c.

Referenced by init_param2(), pipe_create(), pipe_read(), and pipe_write().

◆ maxproc

int maxproc

Definition at line 90 of file subr_param.c.

Referenced by callout_callwheel_init(), fork1(), init_param2(), proc0_init(), procinit(), threadinit(), uihashinit(), and vntblinit().

◆ maxprocperuid

int maxprocperuid

Definition at line 91 of file subr_param.c.

Referenced by init_param2(), and kern_proc_setrlimit().

◆ maxssiz

u_long maxssiz

Definition at line 109 of file subr_param.c.

Referenced by exec_map_stack(), init_param1(), kern_proc_setrlimit(), and proc0_init().

◆ maxswzone

u_long maxswzone

Definition at line 100 of file subr_param.c.

Referenced by init_param1().

◆ maxtsiz

u_long maxtsiz

Definition at line 105 of file subr_param.c.

Referenced by enforce_limits(), exec_aout_imgact(), and init_param1().

◆ maxusers

int maxusers

Definition at line 89 of file subr_param.c.

Referenced by init_param2().

◆ msgbufsize

int msgbufsize

Definition at line 94 of file subr_param.c.

Referenced by init_param1().

◆ nbuf

int nbuf

Definition at line 95 of file subr_param.c.

Referenced by bufinit(), bufshutdown(), cluster_read(), init_param2(), kern_vfs_bio_buffer_alloc(), ksprintn(), kvprintf(), msglogchar(), and vntblinit().

◆ ngroups_max

int ngroups_max

Definition at line 97 of file subr_param.c.

Referenced by crsetgroups(), init_param1(), kern_setgroups(), and sys_setgroups().

◆ nswbuf

int nswbuf

Definition at line 98 of file subr_param.c.

Referenced by cluster_init(), init_param2(), and kern_vfs_bio_buffer_alloc().

◆ pid_max

pid_t pid_max = PID_MAX

Definition at line 99 of file subr_param.c.

Referenced by fork_findpid(), init_param1(), init_param2(), sysctl_kern_pid_max(), and sysctl_kern_randompid().

◆ sgrowsiz

u_long sgrowsiz

Definition at line 110 of file subr_param.c.

Referenced by exec_map_stack(), and init_param1().

◆ tick

int tick

Definition at line 86 of file subr_param.c.

Referenced by acct_process(), cpu_initclocks_bsp(), cputick2usec(), hardclock_itimer(), init_param1(), itimerfix(), itimespecfix(), kern_setitimer(), statclock(), sysctl_kern_clockrate(), and tvtohz().

◆ tick_bt

struct bintime tick_bt

Definition at line 87 of file subr_param.c.

Referenced by cpu_initclocks_bsp(), init_param1(), and inittimecounter().

◆ tick_sbt

sbintime_t tick_sbt

Definition at line 88 of file subr_param.c.

Referenced by callout_when(), cpu_initclocks_bsp(), getnextcpuevent(), handleevents(), init_param1(), inittimecounter(), pause_sbt(), taskqueue_enqueue_timeout(), and umtx_abs_timeout_getsbt().

◆ vm_guest

int vm_guest = VM_GUEST_NO

Definition at line 104 of file subr_param.c.

Referenced by calcru1(), init_param1(), and sysctl_kern_vm_guest().

◆ vm_guest_sysctl_names

const char* const vm_guest_sysctl_names[]