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Date:      Sat, 15 Apr 2000 13:31:33 -0400 (EDT)
From:      Brian Fundakowski Feldman <green@FreeBSD.org>
To:        Alfred Perlstein <bright@wintelcom.net>
Cc:        Michael Reifenberger <root@nihil.plaut.de>, "dillon @ freebsd . org FreeBSD-Current" <current@FreeBSD.ORG>, alc@FreeBSD.ORG
Subject:   Re: panic: vm_object_shadow: source object has OBJ_ONEMAPPING set.
Message-ID:  <Pine.BSF.4.21.0004151328500.16430-100000@green.dyndns.org>
In-Reply-To: <20000415092639.Q4381@fw.wintelcom.net>

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On Sat, 15 Apr 2000, Alfred Perlstein wrote:

> Yes, find all places where source->ref_count is incremented and check
> for OBJ_ONEMAPPING as well as where OBJ_ONEMAPPING is set.
> 
> Then add some printfs to find the snippet that's incrementing it
> to complain when the OBJ_ONEMAPPING bit is set, and complain if
> setting OBJ_ONEMAPPING when the refcount is too high.
> 
> Blotting out a KASSERT isn't the right thing to do.

Well, first the question must be answered, in an absolute yes or no:
is it wrong in the first place to have OBJ_ONEMAPPING set with a ref_count
of more than 1?  I'd accept an authoritative answer about this from
alc, dillon, dyson, or luoqi, who are all very familiar with the new
VM.

> -- 
> -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
> "I have the heart of a child; I keep it in a jar on my desk."

--
 Brian Fundakowski Feldman           \  FreeBSD: The Power to Serve!  /
 green@FreeBSD.org                    `------------------------------'



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