mfi timeout issues and patch that seems to work (PERC H800)

[Jan Mikkelsen]

On 24/02/2012, at 10:59 AM, Csillag Tamas wrote:

> Hi,
> 
> I had the same issues with the Perc H800 controller as it is described
> here: 
> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/140416
> (Just for google I include the error here:
> mfi0: COMMAND 0xffffff80009c4b90 TIMEOUT AFTER 41 SECONDS)
> [ … ]
> however getting and compiling the newest kernel did NOT fix it for me.
> Issuing commands with mfiutils still fixed the hang and everything
> returned to normal.
> 
> It seems that intensive read triggers the issue, but if you have write
> concurrently you are fine (mostly). Restarting rsync is ideal for
> triggering this buggy condition.
> 
> I tried to poke around in the source code and in the end tweaked the
> patch (seen here before
> http://lists.freebsd.org/pipermail/freebsd-scsi/2011-March/004839.html):
> 
> replacing
> (void)sc->mfi_read_fw_status(sc);
> with
> mfi_get_controller_info(sc);
> around line 933
> 
> and after testing it for a day it seems to be solid.
> (The original patch did not help me.)
> 
> Can someone expert in the topic can confirm if any of this is correct?


The default value for hw.mfi.msi is 0. I had to set it to 1 in /boot/loader.conf when using a 9261-8i controller. It might be worth retesting with that setting and the standard kernel.

Regards,

Jan.