From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ric Wheeler <ric@emc.com>
Subject: Re: error handling - DMA to PIO step down sequence
Date: Thu, 21 Sep 2006 12:50:08 -0400
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Tejun Heo <htejun@gmail.com>, linux-ide@vger.kernel.org, Jeff Garzik <jgarzik@pobox.com>, Mark Lord <mlord@pobox.com>

Alan Cox wrote:
> Ar Iau, 2006-09-21 am 12:26 -0400, ysgrifennodd Ric Wheeler:
> 
>>>>Would this be a reasonable thing for a config option? Better to add 
>>>>yet another blacklist for devices that might have a justified need for 
>>>>this derating?
> 
> 
> I think so. I've got "Adding a set of flags to blacklist entries" on my
> todo list so that we can indicate and deal with different kinds of
> horkage.
> 

That could be very useful - flag specific drives to disable NCQ 
(regardless of the internal setting for drive queue depth) and so on.

ric