Skip site navigation (1)Skip section navigation (2)
Date:      Sun, 6 Nov 2016 11:41:18 -0700
From:      Scott Long <scottl@samsco.org>
To:        Michael Tuexen <tuexen@FreeBSD.org>
Cc:        Konstantin Belousov <kostikbel@gmail.com>, FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: New warnings from WITNESS
Message-ID:  <EDC33B42-DF87-4502-888E-F4EDE3535261@samsco.org>
In-Reply-To: <E7BE730E-774D-426E-950F-E936A2456200@freebsd.org>
References:  <CA9B9B19-5311-4A4E-87ED-8771C1000BEC@freebsd.org> <20161106122802.GA54029@kib.kiev.ua> <A89EC552-F99B-42C1-9990-8937E08A69A6@freebsd.org> <20161106143908.GE54029@kib.kiev.ua> <E7BE730E-774D-426E-950F-E936A2456200@freebsd.org>

next in thread | previous in thread | raw e-mail | index | archive | help

> On Nov 6, 2016, at 11:01 AM, Michael Tuexen <tuexen@FreeBSD.org> =
wrote:
>=20
>> On 6 Nov 2016, at 15:39, Konstantin Belousov <kostikbel@gmail.com> =
wrote:
>>=20
>> On Sun, Nov 06, 2016 at 02:17:45PM +0100, Michael Tuexen wrote:
>>>> On 6 Nov 2016, at 13:28, Konstantin Belousov <kostikbel@gmail.com> =
wrote:
>>>>=20
>>>> On Sun, Nov 06, 2016 at 12:50:12PM +0100, Michael Tuexen wrote:
>>>>> bus_dmamap_create with the following non-sleepable locks held:
>>>>> exclusive sleep mutex mpt (mpt) r =3D 0 (0xfffffe0000e2f008) =
locked @ dev/mpt/mpt.c:2287
>>>>> stack backtrace:
>>>>> #0 0xffffffff80ac0300 at witness_debugger+0x70
>>>>> #1 0xffffffff80ac15e7 at witness_warn+0x3d7
>>>>> #2 0xffffffff81055fef at bus_dmamap_create+0x2f
>>>>> #3 0xffffffff80678a25 at mpt_configure_ioc+0x3a5
>>>>> #4 0xffffffff80677476 at mpt_attach+0x226
>>>>> #5 0xffffffff80683299 at mpt_pci_attach+0x9c9
>>>>> #6 0xffffffff80a9478d at device_attach+0x41d
>>>>> #7 0xffffffff80a9595a at bus_generic_attach+0x4a
>>>>> #8 0xffffffff806ebe75 at pci_attach+0xd5
>>>>> #9 0xffffffff80a9478d at device_attach+0x41d
>>>>> #10 0xffffffff80a9595a at bus_generic_attach+0x4a
>>>>> #11 0xffffffff803c11a2 at acpi_pcib_acpi_attach+0x402
>>>>> #12 0xffffffff80a9478d at device_attach+0x41d
>>>>> #13 0xffffffff80a9595a at bus_generic_attach+0x4a
>>>>> #14 0xffffffff803b4c8f at acpi_attach+0xdbf
>>>>> #15 0xffffffff80a9478d at device_attach+0x41d
>>>>> #16 0xffffffff80a9595a at bus_generic_attach+0x4a
>>>>> #17 0xffffffff80ee03e3 at nexus_acpi_attach+0x73
>>>>>=20
>>>>> ... and so on. Not sure which revision introduced it...
>>>> r308268
>>>>=20
>>>> I believe that this is an mpt(4) driver issue, which calls
>>>> bus_dmamap_create(9) with the mpt mutex held.
>>> OK. Whom to contact? Or are you willing to look into it?
>>> I haven't worked in that area...
>>=20
>> I am really not sure.  Looking at the svn history is not very =
encouraging.
> Hmm. Time to change my setup, I guess...
>>=20
>> Might be try freebsd-scsi@ as well.
> I dropped them an e-mail...
>=20
>=20

Please see my response on that list.

Scott





Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?EDC33B42-DF87-4502-888E-F4EDE3535261>