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From: Andrew Gallatin <gallatin@cs.duke.edu>
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Date: Fri, 4 Apr 2003 10:27:34 -0500 (EST)
To: Nate Lawson <nate@root.org>
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cc: current@freebsd.org
Subject: Re: MPSAFE fxp m_pkthdr not valid
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Nate Lawson writes:
 > I have gotten fxp running with MPSAFE and did a large scp transfer.  It
 > ran for a few minutes and then paniced.  It was trap 12 (page fault) at
 > address 0x24.  Here is where it crashed:
 > 
<..>
 > The deref of mb_head->m_pkthdr is invalid.  Note that my fxp_intr function
 > acquires the fxp lock right away so this shouldn't be a race in fxp.

Where else is the lock acquired?  It would be easier to help if we
could see a diff..

Drew