linux-kernel - Re: sata_nv + ADMA + Samsung disk problem

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Message-ID: <20080111231813.GB7052@boogie.lpds.sztaki.hu>
Date:	Sat, 12 Jan 2008 00:18:13 +0100
From:	Gabor Gombas <gombasg@...aki.hu>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	Allen Martin <AMartin@...dia.com>, Mark Lord <lkml@....ca>,
	Jeff Garzik <jeff@...zik.org>, Tejun Heo <htejun@...il.com>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Kuan Luo <kluo@...dia.com>, Peer Chen <pchen@...dia.com>
Subject: Re: sata_nv + ADMA + Samsung disk problem

On Mon, Jan 07, 2008 at 06:10:29PM -0600, Robert Hancock wrote:

> Gabor, I just noticed you said that it worked OK in 2.6.20, yet 2.6.22  
> fails. 2.6.20 had ADMA support as well, so I wonder what change started  
> causing the problem. Would it be possible for you to do a git bisect (or  
> at least try 2.6.21 to try and narrow it down)?

I've now booted 2.6.21.7, we'll see. The problem with the bisection is
that I can't explicitely trigger the bug so I can't say for sure if a
kernel is good or it is just needs more time to trigger. The average
uptime of this machine is just a couple hours a day.

For example, with 2.6.24-rc6 it took over 3 hours for the first disk to
trigger the bug and the second disk needed more than 7 hours. This
machine is seldom turned on for that long.

Gabor

-- 
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     MTA SZTAKI Computer and Automation Research Institute
                Hungarian Academy of Sciences
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