linux-kernel - Re: Kernel 2.6.30rc7 limits IDE to UDMA33

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Date:	Sun, 7 Jun 2009 20:24:11 +0200
From:	Grozdan <neutrino8@...il.com>
To:	Robert Hancock <hancockrwd@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	tj@...nel.org, alan@...rguk.ukuu.org.uk
Subject: Re: Kernel 2.6.30rc7 limits IDE to UDMA33

2009/6/7 Robert Hancock <hancockrwd@...il.com>:
> Grozdan wrote:
>>
>> 2009/6/6 Robert Hancock <hancockrwd@...il.com>:
>>>
>>> Thing is somehow the GTM detection isn't working now and it apparently
>>> was
>>> in 2.6.27.1. I'm not seeing any patches to pata_via or libata-acpi that
>>> seem
>>> like they would affect this offhand. Grozdan, would you be able to try
>>> git
>>> bisect to try to figure out what changed the behavior?
>>>
>>> CCing Tejun in case he has any ideas..
>>>
>>
>> I've no idea how and where to do a git bisect so if someone is willing
>> to explain in simple steps, I can try...
>
> Linus's post on here is a pretty simple explanation:
>
> http://kerneltrap.org/node/11753
>

Yes, it's clear to someone who's familiar with git but not to a noob
like me. Where do I run this git? After it's finished what to do next?
How many times do I have to compile kernels? Which kernels exactly?
After booting a "bad" kernel, what then? etc... From reading the
article, the guy has to compile 14!! times just to catch a problem
between kernel 2.6.21 and 2.6.22. I guess in my case I'll have to
compile a lot more than 14 times to catch something between kernel
2.6.27 and 2.6.30 and honestly I don't have time for this right now.
However, I did a diff between the pata_via driver of kernel 2.6.27 and
2.6.30 and there have been changes to it but I'm not sure if they
affect the cable detection...
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