linux-kernel - Re: 2.6.20.3 AMD64 oops in CFQ code

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Date:	Wed, 04 Apr 2007 19:22:32 -0400
From:	Bill Davidsen <davidsen@....com>
To:	Tejun Heo <teheo@...e.de>
CC:	linux@...izon.com, dan.j.williams@...el.com,
	linux-ide@...r.kernel.org, neilb@...e.de, cebbert@...hat.com,
	jens.axboe@...cle.com, linux-kernel@...e.us,
	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org
Subject: Re: 2.6.20.3 AMD64 oops in CFQ code

Tejun Heo wrote:
> [resending.  my mail service was down for more than a week and this
> message didn't get delivered.]
>
> linux@...izon.com wrote:
>   
>>> Anyway, what's annoying is that I can't figure out how to bring the
>>> drive back on line without resetting the box.  It's in a hot-swap
>>>       
> enclosure,
>   
>>> but power cycling the drive doesn't seem to help.  I thought libata
>>>       
> hotplug
>   
>>> was working?  (SiI3132 card, using the sil24 driver.)
>>>       
>
> Yeah, it's working but failing resets are considered highly dangerous
> (in that the controller status is unknown and may cause something
> dangerous like screaming interrupts) and port is muted after that.  The
> plan is to handle this with polling hotplug such that libata tries to
> revive the port if PHY status change is detected by polling.  Patches
> are available but they need other things to resolved to get integrated.
>  I think it'll happen before the summer.
>
> Anyways, you can tell libata to retry the port by manually telling it to
> rescan the port (echo - - - > /sys/class/scsi_host/hostX/scan).
>   
I won't say that's voodoo, but if I ever did it I'd wipe down my 
keyboard with holy water afterward. ;-)

Well, I did save the message in my tricks file, but it sounds like a 
last ditch effort after something get very wrong.

-- 
bill davidsen <davidsen@....com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979

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