From owner-freebsd-current  Mon May 21  1:20:39 2001
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To: Dima Dorfman <dima@unixfreak.org>
Cc: mheffner@vt.edu, freebsd-current@freebsd.org, alfred@freebsd.org
Subject: Re: panic: mutex vm not owned 
In-reply-to: Your message of "Sun, 20 May 2001 13:29:22 PDT."
             <20010520202933.847EB3E0B@bazooka.unixfreak.org> 
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Date: Mon, 21 May 2001 09:20:31 +0100
From: David Malone <dwmalone@maths.tcd.ie>
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> Please try the attached patch.  I make no claims of its correctness,
> but this e-mail is coming to you via X on -current updated a few hours
> ago so it works here :-).

I tried Dima's patch (the one which Alfred has committed) and I
get an earlier mutex recursion panic, probably when a local progam
that uses shm forks and exits. I scribbled down this trace from
it:

panic+0x70
_mtx_assert+0x67
lockmgr+0xdc
vm_map_remove+0x42
shm_delete_mapping+0xe1
shmexit_myhook+0x29
exit1+0x9eb
exit1

So it looks like those routines are sometime called with the mutex
already held.

	David.

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