mpt0 timeouts with an intel SASUC8I controller

[Marius Strobl]

On Mon, Sep 19, 2011 at 02:45:04PM +0200, Thomas Vogt wrote:
> Hello
> 
> I've stability issue with my new intel SASUC8I [1] PCIe controller. It's a LSI 1068e based controller. After a few minutes with disk io (csup or scrub by example) my FreeBSD 8-stable (64bit) is "freezing" for a couple of minutes and I see a lot of error messages like:
> 
> Sep 17 03:10:03 gw kernel: mpt0: request 0xffffff80002bc3b0:48367 timed out for ccb 0xffffff00050a8000 (req->ccb 0xffffff00050a8000)
> Sep 17 03:10:03 gw kernel: mpt0: request 0xffffff80002bbb40:48368 timed out for ccb 0xffffff0004f81800 (req->ccb 0xffffff0004f81800)
> Sep 17 03:10:03 gw kernel: mpt0: completing timedout/aborted req 0xffffff80002bc3b0:48367
> Sep 17 03:10:03 gw kernel: mpt0: completing timedout/aborted req 0xffffff80002bbb40:48368
> Sep 17 03:10:03 gw kernel: mpt0: Timedout requests already complete. Interrupts may not be functioning
> 

If this really is an issue with interrupts not getting delivered you
could try whether disabling MSI/MSI-X by setting hw.pci.enable_msi=0
and hw.pci.enable_msix=0 either on the loader prompt or via loader.conf
works around it.

Marius