linux-kernel - Re: 2.6.27.6 question: ata_sff_hsm

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Message-ID: <alpine.DEB.1.10.0811160410510.27319@p34.internal.lan>
Date:	Sun, 16 Nov 2008 04:11:40 -0500 (EST)
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	Tejun Heo <tj@...nel.org>
cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Robert Hancock <hancockr@...w.ca>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-raid@...r.kernel.org
Subject: Re: 2.6.27.6 question: ata_sff_hsm_move: ata15 (why always ata15)?



On Sun, 16 Nov 2008, Tejun Heo wrote:

> Alan Cox wrote:
>> On Fri, 14 Nov 2008 21:22:58 -0600
>> Robert Hancock <hancockr@...w.ca> wrote:
>>
>>> Justin Piszcz wrote:
>>>> I am trying to find out what the root cause of this error/problem is:
>>>> https://bugzilla.redhat.com/show_bug.cgi?id=462425
>>> The problem is that people assume that timeouts with DRDY like that bug
>>> refers to must be the same problem when it is often not
>>
>> The first stopping point is to apply the DRQ drain patch I sent to the
>> list some time ago and is hopefully lined up for 2.6.29. After that point
>> you can begin to look at the remaining cases, until then its hardly worth
>> it.
>
> Is it really?  For many SATA controllers, DRQ draining isn't really
> necessary.  PATA might be a completely different story tho.

I have been running with the patch for almost 24 hours and running 
extensive disk tests, so far nothing but sometimes it takes a few days 
or more to repeat, I am continuing to test to see if the problem recurs..

Justin.
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