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Date: Tue, 28 Feb 2006 14:17:30 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: John Baldwin <jhb@freebsd.org>
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Cc: stable@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: panic: thread with borrowed priority returning to userland
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On Tue, Feb 28, 2006 at 12:07:37PM -0500, John Baldwin wrote:
> On Saturday 25 February 2006 09:17, Kris Kennaway wrote:
> > Panic on 6.1-PRERELEASE (package build machine):
> >=20
> > db> wh
> > Tracing pid 85657 tid 100133 td 0xc2612600
> > kdb_enter(c06cabdd,c07250c0,c06cc327,cdca4cac,100) at kdb_enter+0x30
> > panic(c06cc327,2,c06cc3bf,267,2814d4e8) at panic+0xd5
> > sched_userret(c2612600,c04e290d,c0724dc0,1,2814d4e8) at sched_userret+0=
x21
> > userret(c2612600,cdca4d38,63,100,1010000) at userret+0xd8
> > ast(cdca4d38) at ast+0x556
> > doreti_ast() at doreti_ast+0x17
> >=20
> > Core available.
>=20
> Does this thread (tid 100133) hold any locks?  That panic would
> be indicative of that since it drops its inherited priority when it
> releaes a contested mutex.

See other followups for diagnosis.

Kris

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