linux-kernel - Re: Linux 2.6.30-rc8 [also: VIA Support]

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Message-Id: <200906041700.17852.lkml@morethan.org>
Date:	Thu, 4 Jun 2009 17:00:15 -0500
From:	"Michael S. Zick" <lkml@...ethan.org>
To:	Dave Jones <davej@...hat.com>
Cc:	Harald Welte <HaraldWelte@...tech.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Duane Griffin <duaneg@...da.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.30-rc8 [also: VIA Support]

On Thu June 4 2009, Dave Jones wrote:
> On Thu, Jun 04, 2009 at 04:38:13PM -0500, Michael S. Zick wrote:
>  > I have already preceded that chunk of code with a printk and confirmed
>  > that x86_clflush_size is properly set to 64 bytes (somewhere else).
>  > 
>  > So your suggestion is the obvious one for the C7-M,
>  > I don't know about any other makes/models. 
>  > 
>  > This machine's C7-M is being reported as a "stepping 0" ??
>  > What is earlier than a stepping 0 ??
> 
> Earlier model numbers.
> (Stepping gets reset to 0 every time they bump the model)
> 

So 6.model=13.stepping=0 should do it for the (or this) C7-M, correct?
Your mention of "earlier models" will not apply until there is a
stepping >0 for a model=13, correct?

Would a good practice be to put a "WARN_ON" in there in case a stepping
greater than =0 happens to execute the code?
In addition to checking specificly for 6.13.0 (rather than just 6.13).

Hmmm...
But that is making a big mess of a small mess -
Why not just do the assignment you suggest for 6.model>=13?

Models earlier than 13 are evidently working (due to lack of
bug reports or other noise on this list).

Mike
> 	Dave
> 
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