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Date: Fri, 3 Mar 2006 16:03:17 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: John Baldwin <jhb@freebsd.org>
Message-ID: <20060303210317.GB11807@xor.obsecurity.org>
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Cc: current@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: panic: blockable sleep lock (sleep mutex) Giant @
	kern/kern_intr.c:661
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On Fri, Mar 03, 2006 at 11:14:47AM -0500, John Baldwin wrote:
> On Thursday 02 March 2006 18:59, Kris Kennaway wrote:
> > Updated to -current, panicked at boot:
> >=20
> > Timecounters tick evpanic: blockable sleep lock (sleep mutex) Giant @ k=
ern/kern_intr.c:661
> > cpuid =3D 0
> > KDB: enter: panic
> > [thread pid 30 tid 100035 ]
> > Stopped at      kdb_enter+0x30: leave
> > db> wh
> > Tracing pid 30 tid 100035 td 0xcc5b7bd0
> > kdb_enter(c072c0f6,0,c07303fc,f5893c50,cc5b7bd0) at kdb_enter+0x30
> > panic(c07303fc,c074362d,c073e0e1,c07294ca,295) at panic+0x13f
> > witness_checkorder(c07939e8,9,c07294ca,295,c07999f8) at witness_checkor=
der+0xd6
> > _mtx_lock_flags(c07939e8,0,c07294c1,295,2) at _mtx_lock_flags+0x94
> > ithread_execute_handlers(cc5c1000,cc5f8c80,c052b648,c07939d0,cc5b7bd0) =
at ithread_execute_handlers+0x10c
> > ithread_loop(cc5d3440,f5893d38,c07292b7,31a,cc5d3440) at ithread_loop+0=
x78
> > fork_exit(c051d959,cc5d3440,f5893d38) at fork_exit+0xc5
> > fork_trampoline() at fork_trampoline+0x8
> > --- trap 0x1, eip =3D 0, esp =3D 0xf5893d6c, ebp =3D 0 ---
>=20
> Something has leaked a critical section.  Do you have witness_skipspin en=
abled?
> Can you try turning it off?  It's probably a missing unlock of a spin mut=
ex
> somewhere.

WITNESS_SKIPSPIN was not enabled.

Kris

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