linux-kernel - Re: sata_nv ADMA controller lockup investigation

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Message-ID: <45D439F7.3030604@garzik.org>
Date:	Thu, 15 Feb 2007 05:46:15 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Robert Hancock <hancockr@...w.ca>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, Allen Martin <AMartin@...dia.com>,
	nas@...trix.com, B.Steinbrink@....de
Subject: Re: sata_nv ADMA controller lockup investigation

Robert Hancock wrote:
> It's curious that only the post-cache-flush command is having issues,
> and normal NCQ operation seems fine. Maybe it's related to that tag 0
> being reused repeatedly?


If you take cache flush out of the equation, what happens when NCQ is 
enabled with a queue depth of 1 (to reproduce tag-0-used-repeatedly 
condition)?

	Jeff


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