From owner-freebsd-hackers  Tue Jun 11  9:11:16 2002
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Date: Tue, 11 Jun 2002 11:03:31 +0200
From: Ferruccio Vitale <freebsd@cs.tin.it>
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To: hiten@uk.FreeBSD.org
Cc: Andy Sporner <sporner@nentec.de>, freebsd-hackers@FreeBSD.ORG
Subject: Re: kernel thread
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Hiten Pandya wrote:

> Ok, I cant find any man page called shutdown_kproc in either 4.3 or 4.4.
> Anyway, he wants to destroy a "thread", and not an "internal" daemon/process.
>
> To destroy a kernel thread, you need to make use of the kthread_exit()
> operation.  It is prototyped as follows:
>
> void kthread_exit(ecode);
>
> The *ecode* arg to kthread_exit() is used to specify the return code of
> the thread which you are going to terminate.
>
> Additonal Information can be found from:
> kthread(9)  -- (available in FreeBSD 5.0)
> sys/kthread.h
>
> HTH.
>
> Hiten
> hiten@uk.FreeBSD.org, hiten@xMach.org
>
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Ok, I found the way! :-)
On loading my kernel module, I call kthread_create to create the thread
(kproc_start is only a wrapper to it). Doing this, I also obtain the pid of new
process: this one enters in a loop as shown below:

while (var == 0) {
    kproc_suspend_loop(procp);
    .....
    tsleep(procp, PUSER, "procslp", hz);
}
kthread_exit(0);

On unloading this module, I set to 1 'var' and let the thread exits.

I hope this the right way to do it.
Thanx to everyone, guy :-)

Ferruccio

PS: oohh my english......


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