Thread-related LOR in exit1() (fwd)

[David Xu]

----- Original Message ----- 
From: "Daniel Eischen" <eischen at pcnet1.pcnet.com>
To: <threads at freebsd.org>
Cc: <davidxu at freebsd.org>
Sent: Monday, April 21, 2003 10:33 PM
Subject: Thread-related LOR in exit1() (fwd)


> David, did you see this message sent to -current?
> 
I have committed a fix.

> Also, I have scope system threads running in a simple test.  I'm
> getting EPROCLIM though when trying to create more than 4 or so
> of them (KSEs with their own KSEG).
> 

Yeah,  sysctl -a |grep kern.threads
should show the reason,  please increase max_groups_per_proc sysctl by hand,
I know it's too small. :-)

> Here's the patches to libpthread that I'm currently using along
> with a test program.
> 
>     http://people.freebsd.org/~deischen/kse/libpthread.diffs
>     http://people.freebsd.org/~deischen/kse/thread_test2.c
> 
I am going to sleep again,  I will test it tomorrow.
it seems KMF_NOCOMPLETED should be added in _kse_lock_wait().

> -- 
> Dan
> 
> ---------- Forwarded message ----------
> Date: Mon, 21 Apr 2003 20:25:41 +1000
> From: Tim Robbins <tjr at freebsd.org>
> To: current at freebsd.org
> Subject: Thread-related LOR in exit1()
> 
> While running a trivial test program linked with libkse that created
> 3 threads:
> 
> lock order reversal
>  1st 0xc0f0f428 process lock (process lock) @ /usr/src/sys/kern/kern_exit.c:134
>  2nd 0xc02f75c0 Giant (Giant) @ /usr/src/sys/kern/kern_exit.c:142
> 
> 
> Tim
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