Date: Fri, 1 Oct 2010 18:33:44 -0700 From: David Wolfskill <david@catwhisker.org> To: current@freebsd.org Subject: Re: Hang near end of kernel probes since r213267 (likely earlier) Message-ID: <20101002013344.GI1535@albert.catwhisker.org> In-Reply-To: <20101001233001.GG1535@albert.catwhisker.org> References: <20101001212038.GE1535@albert.catwhisker.org> <20101001233001.GG1535@albert.catwhisker.org>
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On Fri, Oct 01, 2010 at 04:30:01PM -0700, David Wolfskill wrote:
> ...
> I found the disabling the "Module Bay" appears to avoid the hang --
> reliably.
>
> That appears to be the minimally-invasive change necessary to avoid the
> hang.
> ....
Until I realized what was in the Modular Bay: the CD/CVD reader/burner.
So I tried a variation on the theme: I left all the devices enabled,
but I physically removed the device from the bay before booting -- and
was unable to get it to fail.
And -- just now -- I disabled the channel (via atacontrol(8)), inserted
the drive, and enabled the channel:
g1-222# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <ST9250421ASG/DE16> SATA revision 2.x
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
ATA channel 4:
Master: no device present
Slave: no device present
ATA channel 5:
Master: no device present
Slave: no device present
g1-222# atacontrol detach ata3
g1-222# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <ST9250421ASG/DE16> SATA revision 2.x
Slave: no device present
ATA channel 3:
Master: no device present
Slave: no device present
ATA channel 4:
Master: no device present
Slave: no device present
ATA channel 5:
Master: no device present
Slave: no device present
g1-222# atacontrol attach ata3
Master: acd0 <TSSTcorp DVD+/-RW TS-U633A/D200> SATA revision 1.x
Slave: no device present
g1-222# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <ST9250421ASG/DE16> SATA revision 2.x
Slave: no device present
ATA channel 3:
Master: acd0 <TSSTcorp DVD+/-RW TS-U633A/D200> SATA revision 1.x
Slave: no device present
ATA channel 4:
Master: no device present
Slave: no device present
ATA channel 5:
Master: no device present
Slave: no device present
g1-222#
This is running:
FreeBSD g1-222.catwhisker.org. 9.0-CURRENT FreeBSD 9.0-CURRENT #1 r213322: Fri Oct 1 10:18:30 PDT 2010 root@g1-222.catwhisker.org.:/usr/obj/usr/src/sys/CANARY i386
Any ideas on what mught be causing CURRENT to hang -- sometimes
-- given that it appears to involve the Modular Bay (or the specific
device that is in the bay during the hang)?
Peace,
david
--
David H. Wolfskill david@catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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