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Date:      Fri, 31 May 2013 13:52:03 -0600
From:      "Justin T. Gibbs" <gibbs@scsiguy.com>
To:        sbruno@freebsd.org
Cc:        "FreeBSD-scsi@freebsd.org" <FreeBSD-scsi@freebsd.org>
Subject:   Re: ahd(4) reliable panic
Message-ID:  <838492F2-0197-4279-8397-ED4C0F320941@scsiguy.com>
In-Reply-To: <1370026659.2163.1.camel@localhost>
References:  <1370013140.1347.1.camel@localhost> <D0079385-4C40-40E9-A53E-4A26AFA536F0@scsiguy.com> <1370026659.2163.1.camel@localhost>

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On May 31, 2013, at 12:57 PM, Sean Bruno <sean_bruno@yahoo.com> wrote:

> On Fri, 2013-05-31 at 09:23 -0600, Justin T. Gibbs wrote:
>> On May 31, 2013, at 9:12 AM, Sean Bruno <sean_bruno@yahoo.com> wrote:
>>=20
>>> ports building seems to be able to panic ahd(4) pretty reliably.
>>>=20
>>>=20
>>>> db> whe
>>>> Tracing pid 12 tid 100040 td 0xfffffe0015b53000
>>>> ahd_freeze_devq() at ahd_freeze_devq+0x16/frame 0xffffff800039da60
>>>> ahd_handle_seqint() at ahd_handle_seqint+0xf11/frame =
0xffffff800039db00
>>>> ahd_platform_intr() at ahd_platform_intr+0x242/frame =
0xffffff800039db20
>>>> intr_event_execute_handlers() at =
intr_event_execute_handlers+0xfd/frame 0xffffff800039db50
>>>> ithread_loop() at ithread_loop+0x9b/frame 0xffffff800039dba0
>>>> fork_exit() at fork_exit+0x11f/frame 0xffffff800039dbf0
>>>> fork_trampoline() at fork_trampoline+0xe/frame 0xffffff800039dbf0
>>>> --- trap 0, rip =3D 0, rsp =3D 0xffffff800039dcb0, rbp =3D 0 ---
>>>=20
>>> This looks like a symptom that was reported in a lot of PR reports. =20=

>>>=20
>>> I'm assuming that I need more information?
>>>=20
>>> Sean
>>=20
>> The panic string would be useful.  So might the msgbuf output.
>>=20
>> --
>> Justin
>=20
>=20
> Full dmesg from boot, then everything that melts down until the panic. =
=20
>=20
> http://people.freebsd.org/~sbruno/package12.log
>=20
> sean

Can you attempt to reproduce this with AHD_REG_PRETTY_PRINT
enabled in your kernel?

Also, do you still have the panic string?

--
Justin=

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