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Date:      Tue, 22 Jul 2008 13:15:12 -0400
From:      Andrew Gallatin <gallatin@cs.duke.edu>
To:        Kostik Belousov <kostikbel@gmail.com>
Cc:        attilio@freebsd.org, freebsd-current@freebsd.org
Subject:   Re: reproducible "panic: share->excl"
Message-ID:  <488615A0.7030106@cs.duke.edu>
In-Reply-To: <20080722154825.GZ17123@deviant.kiev.zoral.com.ua>
References:  <4884F992.7090008@cs.duke.edu> <20080722154825.GZ17123@deviant.kiev.zoral.com.ua>
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Kostik Belousov wrote:

> Essentially, you tried to do the write of the part of the region mmaped
> from the file, to the file. The VOP_WRITE() is called with exclusively
> locked vnode, while fault handler tried to lock the vnode in shared mode
> to page in.

Yes, the operations attempted were rather nonsensical, but should
not have killed the system.  Thank you for looking into it.

Drew
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