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Date:      Thu, 17 Jan 2008 01:05:17 -1000
From:      Parv <parv@pair.com>
To:        Vivek Khera <vivek@khera.org>
Cc:        FreeBSD Stable List <freebsd-stable@freebsd.org>
Subject:   PCI MSI (was Re: What current Dell Systems are supported/work)
Message-ID:  <20080117110517.GA3128@holstein.holy.cow>
In-Reply-To: <70AABDAF-1925-4DBE-88A2-976CFBC55C5E@khera.org>
References:  <DB4DDB04-1ADE-4C36-A846-BB6B7C12EB1B@patmedia.net> <4785616A.4070001@delphij.net> <200801101109.38294.jhb@freebsd.org> <70AABDAF-1925-4DBE-88A2-976CFBC55C5E@khera.org>

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in message <70AABDAF-1925-4DBE-88A2-976CFBC55C5E@khera.org>,
wrote Vivek Khera thusly...
>
> 
> On Jan 10, 2008, at 11:09 AM, John Baldwin wrote:
> 
>>> *: This is the default behavior for 7.0, I have not encountered
>>> the problem mentioned above on any 1950/2950 boxes so far I have
>>> tested.
>> 
>> I will enable MSI by default on 6.x now (so will take affect for
>> 6.4).  We've also enabled it by default on 6.x at work.
>> 
> 
> Where can one go to read up on what MSI is and how it helps us?
> 
> Is enabling it just setting a sysctl?  Does that have to be done
> in loader.conf or can it happen later?

Speaking of MSI being on by default in recent 6-STABLE ... well,
that caused my ThinkPad T61 (8859-CTO) ...

  dmesg:
  http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8859-cto/sys/dmesg

  kernel (combined for easy perusal):
  http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8859-cto/cf/kern/combined/T61-SMP.debug--combined

  /boot/device.hints:
  http://www103.pair.com/parv/comp/unix/freebsd/thinkpad-t61-8859-cto/cf/boot/device.hints


... to go in panic[0].  So, for now I have added ...

  #  Since MSI turned on by default on 2008.01.10.21.17.12 UTC,
  #  causes panic so disable MSI.
  hw.pci.enable_msix=0
  hw.pci.enable_msi=0


... to /boot/loader.conf.


  [0] I could not save the dump for neither do I have access to
      serial console, nor could the file system be mounted.  Missing
      also here is a digital camera.  If anybody is interested, I
      could write screen down, and repeat to them.


  - Parv

-- 




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