Date: Thu, 05 Oct 2000 08:55:09 -0700 From: Jake Burkholder <jburkhol@home.com> To: Mark Murray <mark@grondar.za> Cc: Boris Popov <bp@butya.kz>, freebsd-smp@FreeBSD.ORG Subject: Re: Problems with kthread_exit() and SMPng Message-ID: <20001005155509.24CD9BA76@io.yi.org> In-Reply-To: Message from Mark Murray <mark@grondar.za> of "Thu, 05 Oct 2000 13:47:34 %2B0200." <200010051147.e95BlZL04193@grimreaper.grondar.za>
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> > Currently I'm trying to make KLD which uses kernel threads
> > unloadable under recent -current.
>
> I have exactly the same problem with the devrandom driver. I'll
> test your patch with my driver.
>
> Thanks!
>
I'll bet that you just need to hold Giant before calling
kthread_exit(), since exit1() isn't MP-safe yet. Running
kernel threads outside of the lock is pretty iffy right now.
void
my_thread(void*arg)
{
while(wearewanted) {
do_something();
tsleep();
}
exited = 1;
mtx_enter(&Giant, MTX_DEF);
kthread_exit(0);
}
This should work, but depending on what you're doing it might
be better to grab Giant as the first thing the thread does.
Jake
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