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Date:      Tue, 7 Jun 2005 19:28:02 +0100 (BST)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        delphij@delphij.net
Cc:        freebsd-stable@freebsd.org, Frode Nordahl <frode@nordahl.net>
Subject:   Re: propagate_priority panic
Message-ID:  <20050607192712.F65983@fledge.watson.org>
In-Reply-To: <1118146251.755.4.camel@spirit>
References:  <2D2A5D81-9E95-4D83-B479-D61BBB39C25F@nordahl.net> <1118146251.755.4.camel@spirit>

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On Tue, 7 Jun 2005, Xin LI wrote:

> =FF=FF 2005-06-07=FF=FF=FF=FF 09:32 +0200=FF=FFFrode Nordahl=FF=FF=FF=FF=
=FF=FF
>> Dear colleagues,
> [snip]
>> db> trace
>> Tracing pid 86 tid 100089 td 0xc54a1e10
>> propagate_priority(c54a1e10,c08f3750,c54c6960,c0901ae0,c54a1e10) at
>> propagate_priority+0x7f
>
> This looks like what I have been observed within a recent -CURRENT=20
> kernel, which indicates a bug that was fixed recently.

propagate_priority() panics are often a symptom of an attempt to use a=20
mutex operation on a non-mutex, so this could be a symptom of an attempt=20
to call mtx_lock() on a free'd data structure (or related bug).

Robert N M Watson
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