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Date:      Sun, 18 Jul 2004 20:58:58 +0200
From:      "Willem Jan Withagen" <wjw@withagen.nl>
To:        "Robert Watson" <rwatson@freebsd.org>
Cc:        current@freebsd.org
Subject:   Re: panic: Duplicate free of item 0xffffff005c4a8600 from zone 0xffffff007fed4780(Mbuf)
Message-ID:  <104401c46cf9$480cee40$471b3dd4@digiware.nl>
References:  <Pine.NEB.3.96L.1040718105655.37108Q-100000@fledge.watson.org>

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> - Try compiling IPv6 out of your kernel -- this will turn on the inpcb
>   locking assertions, which are compiled out by default because IPv4 and
>   IPv6 share the same underlying pcb code and IPv6 does not yet lock that
>   correctly in CVS.  I have patches that do quite a bit of that in
>   Perforce, and sent out an e-mail yesterday to the KAME folk to talk
>   about merging strategies.
> 
> - If this is a reproduceable problem, could you try disabling SACK and see
>   if it changes at all?

How do I disable SACK??
Probably there's a flag for, but which....

--WjW



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