panic - sleeping thread on FreeBSD 8.0-stable / amd64

[C. P. Ghost]

On Sun, Feb 21, 2010 at 12:35 AM, Jeremy Chadwick
<freebsd at jdc.parodius.com>wrote:

> We can safely rule out the Silicon Image controller (otherwise "ataX"
> wouldn't be involved), which leaves the AMD SB700 SATA controller and
> the AMD SB700 PATA controller.
>
> What exact disks (e.g. adX) are attached to ata5 and ata6?  You haven't
> provided dmesg output in any of your posts, and atacontrol/pciconf is
> not sufficient (I should really improve atacontrol by printing this
> information.  I'll work on that in a few minutes).
>
> Some Linux users have reported AHCI-related issues with the SB600
> southbridge, but the core of the problem turned out to be MSI on certain
> AMD northbridges (specifically RS480, RS400, and RS200).  By disabling
> MSI entirely they were able to achieve stability.  The FreeBSD
> equivalent would be to set the following in loader.conf and reboot:
>
> hw.pci.enable_msix="0"
> hw.pci.enable_msi="0"
>
> The Linux quirk fix for this:
>
>
> http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git;a=blob_plain;f=queue-2.6.21/pci-quirks-disable-msi-on-rs400-200-and-rs480.patch;hb=05ab505f2909acf3a614d3e6a32271c4c1f8a69d
>
> Your board has an AMD 740G northbridge, but it might be worth trying the
> MSI disable trick anyway.  If it doesn't fix the problem then definitely
> re-enable MSI.  Isn't hardware fun?  ;-)
>

Just one more data point.

I have a machine with similar hardware: an MSI K9A2GM-FIH motherboard:
  http://eu.msi.com/index.php?func=proddesc&maincat_no=1&prod_no=1436
with an AMD 780G northbridge and AMD SB700 SATA controller,
and I experienced freezes after switching to AHCI.

Those freezes happened e.g. after some sustained random disk activity,
followed by starting 'dvdisaster'. Then the HDD LDD started to blink
slooooowwwwly, every 10 seconds on, then off and again. No more disk
activity on the aha0 controller was possible. The system remained responsive
as long as it didn't involve disk activity (i.e. pings, mouse, keyboard
etc..,
but not starting new processes).

I'm pretty sure it started happening (very sporadically) only after I've
switched to an AHCI setup. It didn't freeze before under the same load
pattern.

I can't test disabling MSI right now on that box, but will try it on a
similar
test machine in a few days (where I hope to reproduce this). Thanks for
the hint!

ahci0: <ATI IXP700 AHCI SATA controller> port
0xc000-0xc007,0xb000-0xb003,0xa000
-0xa007,0x9000-0x9003,0x8000-0x800f mem 0xfe7ff800-0xfe7ffbff irq 22 at
device 1
7.0 on pci0
ahci0: [ITHREAD]
ahci0: AHCI v1.10 with 6 3Gbps ports, Port Multiplier supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich0: [ITHREAD]
ahcich1: <AHCI channel> at channel 1 on ahci0
ahcich1: [ITHREAD]
ahcich2: <AHCI channel> at channel 2 on ahci0
ahcich2: [ITHREAD]
ahcich3: <AHCI channel> at channel 3 on ahci0
ahcich3: [ITHREAD]
ahcich4: <AHCI channel> at channel 4 on ahci0
ahcich4: [ITHREAD]
ahcich5: <AHCI channel> at channel 5 on ahci0
ahcich5: [ITHREAD]

ACPI Warning: \\_SB_.PCI0.SBRG.FDC_._FDE: Return type mismatch - found
Package, expected Buffer 20090521 nspredef-1051

(aprobe0:ahcich0:0:0:0): SIGNATURE: 0000
ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
ada0: <SAMSUNG HD502IJ 1AA01112> ATA/ATAPI-7 SATA 2.x device
ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO size 8192bytes)
ada0: Command Queueing enabled
ada0: 476940MB (976773168 512 byte sectors: 16H 63S/T 16383C)

-cpghost.

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