Doc police fixes
thanks to: ru@
This commit is contained in:
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ef44c8d2a3
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39b920eb0c
@ -129,6 +129,7 @@ MAN= accept_filter.9 \
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kernacc.9 \
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kernel_mount.9 \
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kobj.9 \
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kproc.9 \
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kqueue.9 \
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kthread.9 \
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ktr.9 \
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@ -674,6 +675,13 @@ MLINKS+=kobj.9 DEFINE_CLASS.9 \
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kobj.9 kobj_create.9 \
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kobj.9 kobj_delete.9 \
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kobj.9 kobj_init.9
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MLINKS+=kproc.9 kproc_create.9 \
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kproc.9 kproc_exit.9 \
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kproc.9 kproc_resume,.9 \
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kproc.9 kproc_shutdown.9 \
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kproc.9 kproc_start.9 \
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kproc.9 kproc_suspend.9 \
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kproc.9 kproc_suspend_check.9
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MLINKS+=kqueue.9 knlist_add.9 \
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kqueue.9 knlist_clear.9 \
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kqueue.9 knlist_delete.9 \
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@ -688,11 +696,11 @@ MLINKS+=kqueue.9 knlist_add.9 \
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kqueue.9 kqfd_register.9 \
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kqueue.9 kqueue_add_filteropts.9 \
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kqueue.9 kqueue_del_filteropts.9
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MLINKS+=kthread.9 kproc_shutdown.9 \
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kthread.9 kproc_start.9 \
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kthread.9 kthread_create.9 \
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MLINKS+=kthread.9 kthread_add.9 \
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kthread.9 kthread_exit.9 \
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kthread.9 kthread_resume.9 \
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kthread.9 kthread_shutdown.9 \
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kthread.9 kthread_start.9 \
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kthread.9 kthread_suspend.9 \
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kthread.9 kthread_suspend_check.9
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MLINKS+=ktr.9 CTR0.9 \
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@ -36,7 +36,7 @@
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.Nm kproc_resume ,
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.Nm kproc_suspend ,
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.Nm kproc_suspend_check
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.Nd kernel procs
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.Nd "kernel processes"
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.Sh SYNOPSIS
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.In sys/kthread.h
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.Ft void
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@ -44,7 +44,11 @@
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.Ft void
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.Fn kproc_shutdown "void *arg" "int howto"
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.Ft int
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.Fn kproc_create "void (*func)(void *)" "void *arg" "struct proc **newpp" "int flags" "int pages" "const char *fmt" "..."
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.Fo kproc_create
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.Fa "void (*func)(void *)" "void *arg" "struct proc **newpp"
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.Fa "int flags" "int pages"
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.Fa "const char *fmt" ...
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.Fc
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.Ft void
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.Fn kproc_exit "int ecode"
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.Ft int
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@ -58,37 +62,41 @@ The function
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.Fn kproc_start
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is used to start
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.Dq internal
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daemons such as bufdaemon, pagedaemon, vmdaemon, and the syncer and is intended
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daemons such as
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.Nm bufdaemon , pagedaemon , vmdaemon ,
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and the
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.Nm syncer
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and is intended
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to be called from
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.Xr SYSINIT 9 .
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The
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.Fa udata
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argument is actually a pointer to a
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.Li struct kproc_desc
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.Vt "struct kproc_desc"
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which describes the kernel process that should be created:
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.Bd -literal -offset indent
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struct kproc_desc {
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char *arg0;
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void (*func)(void);
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struct proc **global_procpp;
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char *arg0;
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void (*func)(void);
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struct proc **global_procpp;
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};
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.Ed
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.Pp
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The structure members are used by
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.Fn kproc_start
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as follows:
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.Bl -tag -width "global_procpp" -offset indent
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.Bl -tag -width ".Va global_procpp" -offset indent
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.It Va arg0
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String to be used for the name of the process.
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This string will be copied into the
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.Va p_comm
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member of the new process'
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.Li struct proc .
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.Vt "struct proc" .
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.It Va func
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The main function for this kernel process to run.
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.It Va global_procpp
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A pointer to a
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.Li struct proc
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.Vt "struct proc"
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pointer that should be updated to point to the newly created process' process
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structure.
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If this variable is
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@ -99,7 +107,9 @@ then it is ignored.
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The
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.Fn kproc_create
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function is used to create a kernel process.
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The new process shares its address space with process 0, the swapper process,
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The new process shares its address space with process 0, the
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.Nm swapper
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process,
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and runs in kernel mode only.
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The
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.Fa func
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@ -112,7 +122,7 @@ when it is called by the new process.
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The
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.Fa newpp
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pointer points to a
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.Li struct proc
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.Vt "struct proc"
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pointer that is to be updated to point to the newly created process.
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If this argument is
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.Dv NULL ,
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@ -131,7 +141,7 @@ argument list that is used to build the name of the new process and is stored
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in the
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.Va p_comm
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member of the new process's
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.Li struct proc .
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.Vt "struct proc" .
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.Pp
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The
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.Fn kproc_exit
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@ -170,7 +180,7 @@ resume request.
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The
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.Fa p
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argument points to the
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.Li struct proc
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.Vt "struct proc"
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of the kernel process to suspend or resume.
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For
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.Fn kproc_suspend ,
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@ -195,14 +205,14 @@ and
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functions return zero on success and non-zero on failure.
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.Sh EXAMPLES
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This example demonstrates the use of a
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.Li struct kproc_desc
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.Vt "struct kproc_desc"
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and the functions
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.Fn kproc_start ,
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.Fn kproc_shutdown ,
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and
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.Fn kproc_suspend_check
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to run the
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.Dq bufdaemon
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.Nm bufdaemon
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process.
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.Bd -literal -offset indent
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static struct proc *bufdaemonproc;
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@ -297,6 +307,9 @@ functions were named
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.Fn shutdown_kproc ,
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and
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.Fn kproc_suspend_loop ,
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respectively. Originally they had the names
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.Fn kthread_xxx
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but were changed when real kthreads became available.
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respectively.
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Originally they had the names
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.Fn kthread_*
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but were changed to
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.Fn kproc_*
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when real kthreads became available.
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@ -25,7 +25,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd September 24, 2004
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.Dd October 26, 2007
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.Dt KTHREAD 9
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.Os
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.Sh NAME
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@ -36,9 +36,7 @@
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.Nm kthread_resume ,
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.Nm kthread_suspend ,
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.Nm kthread_suspend_check
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.Nd kernel threads
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.Pp
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.Em PROCESSES .
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.Nd "kernel threads"
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.Sh SYNOPSIS
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.In sys/kthread.h
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.Ft void
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@ -46,7 +44,11 @@
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.Ft void
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.Fn kthread_shutdown "void *arg" "int howto"
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.Ft int
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.Fn kthread_add "void (*func)(void *)" "void *arg" "struct proc *procp" "struct thread **newtdpp" "int flags" "int pages" "const char *fmt" "..."
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.Fo kthread_add
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.Fa "void (*func)(void *)" "void *arg" "struct proc *procp"
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.Fa "struct thread **newtdpp" "int flags" "int pages"
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.Fa "const char *fmt" ...
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.Fc
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.Ft void
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.Fn kthread_exit "void"
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.Ft int
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@ -60,51 +62,62 @@ The function
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.Fn kthread_start
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is used to start
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.Dq internal
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daemons such as bufdaemon, pagedaemon, vmdaemon, and the syncer and is intended
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daemons such as
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.Nm bufdaemon , pagedaemon , vmdaemon ,
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and the
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.Nm syncer
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and is intended
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to be called from
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.Xr SYSINIT 9 .
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The
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.Fa udata
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argument is actually a pointer to a
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.Li struct kthread_desc
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.Vt "struct kthread_desc"
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which describes the kernel thread that should be created:
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.Bd -literal -offset indent
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struct kthread_desc {
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char *arg0;
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void (*func)(void);
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struct thread **global_threadpp;
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char *arg0;
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void (*func)(void);
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struct thread **global_threadpp;
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};
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.Ed
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.Pp
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The structure members are used by
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.Fn kthread_start
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as follows:
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.Bl -tag -width "global_threadpp" -offset indent
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.Bl -tag -width ".Va global_threadpp" -offset indent
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.It Va arg0
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String to be used for the name of the thread.
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This string will be copied into the
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.Va td_name
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member of the new threads'
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.Li struct thread .
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.Vt "struct thread" .
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.It Va func
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The main function for this kernel process to run.
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The main function for this kernel thread to run.
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.It Va global_threadpp
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A pointer to a
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.Li struct thread
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pointer that should be updated to point to the newly created thread' thread
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.Vt "struct thread"
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pointer that should be updated to point to the newly created thread's
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.Vt thread
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structure.
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If this variable is
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.Dv NULL ,
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then it is ignored. The thread will be a subthread of proc0 (PID 0).
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then it is ignored.
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The thread will be a subthread of
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.Va proc0
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(PID 0).
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.El
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.Pp
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The
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.Fn kthread_add
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function is used to create a kernel thread.
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The new thread runs in kernel mode only. It is added to the
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process specified by the
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The new thread runs in kernel mode only.
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It is added to the process specified by the
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.Fa procp
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argument, or if that is NULL, to proc0.
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argument, or if that is
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.Dv NULL ,
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to
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.Va proc0 .
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The
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.Fa func
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argument specifies the function that the thread should execute.
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@ -112,11 +125,11 @@ The
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.Fa arg
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argument is an arbitrary pointer that is passed in as the only argument to
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.Fa func
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when it is called by the new process.
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when it is called by the new thread.
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The
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.Fa newtdp
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.Fa newtdpp
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pointer points to a
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.Li struct thread
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.Vt "struct thread"
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pointer that is to be updated to point to the newly created thread.
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If this argument is
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.Dv NULL ,
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@ -135,14 +148,14 @@ argument list that is used to build the name of the new thread and is stored
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in the
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.Va td_name
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member of the new thread's
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.Li struct thread .
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.Vt "struct thread" .
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.Pp
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The
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.Fn kthread_exit
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function is used to terminate kernel threads.
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It should be called by the main function of the kernel thread rather than
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letting the main function return to its caller.
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The
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.\" XXX "int ecode" argument isn't documented.
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.Pp
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The
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.Fn kthread_resume ,
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@ -167,7 +180,7 @@ resume request.
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The
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.Fa td
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argument points to the
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.Li struct thread
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.Vt "struct thread"
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of the kernel thread to suspend or resume.
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For
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.Fn kthread_suspend ,
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@ -192,14 +205,14 @@ and
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functions return zero on success and non-zero on failure.
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.Sh EXAMPLES
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This example demonstrates the use of a
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.Li struct kthread_desc
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.Vt "struct kthread_desc"
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and the functions
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.Fn kthread_start ,
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.Fn kthread_shutdown ,
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and
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.Fn kthread_suspend_check
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to run the
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.Dq bufdaemon
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.Nm bufdaemon
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process.
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.Bd -literal -offset indent
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static struct thread *bufdaemonthread;
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@ -242,7 +255,7 @@ argument does not reference a kernel thread.
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.El
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.Pp
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The
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.Fn kthread_create
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.Fn kthread_add
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function will fail if:
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.Bl -tag -width Er
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.It Bq Er EAGAIN
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@ -261,39 +274,38 @@ parameter.
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.El
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.Sh SEE ALSO
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.Xr rfork 2 ,
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.Xr kproc 9 ,
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.Xr exit1 9 ,
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.Xr kproc 9 ,
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.Xr SYSINIT 9 ,
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.Xr wakeup 9
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.Sh HISTORY
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The
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.Fn kthread_start
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function first appeared in
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.Fx 2.2
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where it created a whole process. It was converted to create threads in
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.Fx 2.2
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where it created a whole process.
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It was converted to create threads in
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.Fx 8.0 .
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The
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.Fn kthread_shutdown ,
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.Fn kthread_create ,
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.Fn kthread_exit ,
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.Fn kthread_resume ,
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.Fn kthread_suspend ,
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and
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.Fn kthread_suspend_check
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functions were introduced in
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.Fx 4.0
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and were converted to treads in
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.Fx 4.0
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and were converted to threads in
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.Fx 8.0 .
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The
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The
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.Fn kthread_create
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call was renamed to kthread_add in
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call was renamed to
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.Fn kthread_add
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in
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.Fx 8.0 .
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The old functionality of creating a kernel process was renamed
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to
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.Fn kproc_create
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(and friends).
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See
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.Xr kproc 9
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The old functionality of creating a kernel process was renamed
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to
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.Xr kproc_create 9 .
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Prior to
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.Fx 5.0 ,
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the
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