linux-kernel - Re: sata

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Message-ID: <480173CB.5070805@gmail.com>
Date:	Sun, 13 Apr 2008 11:45:31 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Jeff Garzik <jeff@...zik.org>
CC:	Rich West <Rich.West@...mo.com>,
	Wander Winkelhorst <w.winkelhorst@...il.com>,
	linux-kernel@...r.kernel.org,
	Linux IDE mailing list <linux-ide@...r.kernel.org>
Subject: Re: sata_via

Jeff Garzik wrote:
> Rich West wrote:
>> I was only curious as to what turning off power management support 
>> would buy with regard to the sata timeout issue.
> 
> 
> ACPI is not only power management.  It is all the information your 
> hardware conveys to your OS, about the setup and workings of your hardware.
> 
> Without ACPI, non-PM things like SMP, laptop dock/undock, and many other 
> gadgets fail to function (or are configured sub-optimally).
> 
> ACPI sets up interrupt routing, and Linux history is _loaded_ with 
> _years_ of problem reports that appear as timeouts, only to be resolved 
> as ACPI interrupt bugs (aka BIOS bugs, since ACPI tables come from BIOS).

Also, please give a shot at the sacred "irqpoll".

-- 
tejun
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