MFI Driver Behavior

[John Baldwin]

On Thursday, February 17, 2011 11:43:28 am Erich Weiler wrote:
> > We are testing a new theory.  We believe that the C-states and C1E control 
on this chipset (in the Dell R610), which are configurable in the BIOS, are 
affecting the controller in some way.  We are disabling them and trying again.  
I'll post results soon.
> 
> After disabling C-states and CIE in the BIOS on our R610, the Perc H800 
> controller now appears stable.  My ZFS filesystem appears stable.  Life 
> seems good.
> 
> I wonder what those items in the BIOS are doing in relation to the 
> kernel to cause this.

Well, you can miss clock interrupts which might prevent timeout routines from 
firing (or they would fire too late).  9 has several changes that should 
support C1E properly I think.

-- 
John Baldwin