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sys/: Document few more sysctls.

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Submitted by:	Antranig Vartanian <antranigv@freebsd.am>
Reviewed by:	kaktus
Commented by:	jhb
Approved by:	kib (mentor)
Sponsored by:	illuria security
Differential Revision:	https://reviews.freebsd.org/D23759
This commit is contained in:
Pawel Biernacki 2020-03-02 15:30:52 +00:00
parent 80b9f30590
commit b05ca4290c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=358548
7 changed files with 19 additions and 10 deletions
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12
sys/kern/kern_exec.c
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@ -123,18 +123,22 @@ static int do_execve(struct thread *td, struct image_args *args,
/* XXX This should be vm_size_t. */
SYSCTL_PROC(_kern, KERN_PS_STRINGS, ps_strings, CTLTYPE_ULONG|CTLFLAG_RD|
CTLFLAG_CAPRD|CTLFLAG_MPSAFE, NULL, 0, sysctl_kern_ps_strings, "LU", "");
CTLFLAG_CAPRD|CTLFLAG_MPSAFE, NULL, 0, sysctl_kern_ps_strings, "LU",
"Location of process' ps_strings structure");
/* XXX This should be vm_size_t. */
SYSCTL_PROC(_kern, KERN_USRSTACK, usrstack, CTLTYPE_ULONG|CTLFLAG_RD|
CTLFLAG_CAPRD|CTLFLAG_MPSAFE, NULL, 0, sysctl_kern_usrstack, "LU", "");
CTLFLAG_CAPRD|CTLFLAG_MPSAFE, NULL, 0, sysctl_kern_usrstack, "LU",
"Top of process stack");
SYSCTL_PROC(_kern, OID_AUTO, stackprot, CTLTYPE_INT|CTLFLAG_RD|CTLFLAG_MPSAFE,
NULL, 0, sysctl_kern_stackprot, "I", "");
NULL, 0, sysctl_kern_stackprot, "I",
"Stack memory permissions");
u_long ps_arg_cache_limit = PAGE_SIZE / 16;
SYSCTL_ULONG(_kern, OID_AUTO, ps_arg_cache_limit, CTLFLAG_RW,
&ps_arg_cache_limit, 0, "");
&ps_arg_cache_limit, 0,
"Process' command line characters cache limit");
static int disallow_high_osrel;
SYSCTL_INT(_kern, OID_AUTO, disallow_high_osrel, CTLFLAG_RW,

3
sys/kern/kern_shutdown.c
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@ -167,7 +167,8 @@ static int show_busybufs;
static int show_busybufs = 1;
#endif
SYSCTL_INT(_kern_shutdown, OID_AUTO, show_busybufs, CTLFLAG_RW,
&show_busybufs, 0, "");
&show_busybufs, 0,
"Show busy buffers during shutdown");
int suspend_blocked = 0;
SYSCTL_INT(_kern, OID_AUTO, suspend_blocked, CTLFLAG_RW,

3
sys/kern/kern_synch.c
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@ -94,7 +94,8 @@ static fixpt_t cexp[3] = {
};
/* kernel uses `FSCALE', userland (SHOULD) use kern.fscale */
SYSCTL_INT(_kern, OID_AUTO, fscale, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, FSCALE, "");
SYSCTL_INT(_kern, OID_AUTO, fscale, CTLFLAG_RD, SYSCTL_NULL_INT_PTR, FSCALE,
"Fixed-point scale factor used for calculating load average values");
static void loadav(void *arg);

2
sys/kern/kern_umtx.c
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@ -240,7 +240,7 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, umtx_vnode_persistent, CTLFLAG_RWTUN,
static int umtx_max_rb = 1000;
SYSCTL_INT(_kern_ipc, OID_AUTO, umtx_max_robust, CTLFLAG_RWTUN,
&umtx_max_rb, 0,
"");
"Maximum number of robust mutexes allowed for each thread");
static uma_zone_t umtx_pi_zone;
static struct umtxq_chain umtxq_chains[2][UMTX_CHAINS];

3
sys/kern/sched_4bsd.c
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@ -437,7 +437,8 @@ maybe_preempt(struct thread *td)
/* decay 95% of `ts_pctcpu' in 60 seconds; see CCPU_SHIFT before changing */
static fixpt_t ccpu = 0.95122942450071400909 * FSCALE; /* exp(-1/20) */
SYSCTL_UINT(_kern, OID_AUTO, ccpu, CTLFLAG_RD, &ccpu, 0, "");
SYSCTL_UINT(_kern, OID_AUTO, ccpu, CTLFLAG_RD, &ccpu, 0,
"Decay factor used for updating %CPU");
/*
* If `ccpu' is not equal to `exp(-1/20)' and you still want to use the

3
sys/kern/sched_ule.c
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@ -3128,4 +3128,5 @@ SYSCTL_PROC(_kern_sched, OID_AUTO, topology_spec, CTLTYPE_STRING |
/* ps compat. All cpu percentages from ULE are weighted. */
static int ccpu = 0;
SYSCTL_INT(_kern, OID_AUTO, ccpu, CTLFLAG_RD, &ccpu, 0, "");
SYSCTL_INT(_kern, OID_AUTO, ccpu, CTLFLAG_RD, &ccpu, 0,
"Decay factor used for updating %CPU in 4BSD scheduler");

3
sys/kern/subr_kobj.c
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@ -67,7 +67,8 @@ static int kobj_next_id = 1;
#define KOBJ_ASSERT(what) mtx_assert(&kobj_mtx, what);
SYSCTL_INT(_kern, OID_AUTO, kobj_methodcount, CTLFLAG_RD,
&kobj_next_id, 0, "");
&kobj_next_id, 0,
"Number of kernel object methods registered");
static void
kobj_init_mutex(void *arg)