linux-kernel - Re: [stable] [113/197] x86, cacheinfo: Calculate L3 indices

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Message-ID: <4BEB3CD5.9060803@zytor.com>
Date:	Wed, 12 May 2010 16:42:13 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Greg KH <greg@...ah.com>
CC:	Borislav Petkov <borislav.petkov@....com>,
	Jiri Kosina <jkosina@...e.cz>,
	"Ostrovsky, Boris" <Boris.Ostrovsky@....com>,
	"Herrmann3, Andreas" <Andreas.Herrmann3@....com>,
	Greg KH <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>, Jiri Benc <jbenc@...e.cz>,
	Thomas Renninger <trenn@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"stable-review@...nel.org" <stable-review@...nel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [stable] [113/197] x86, cacheinfo: Calculate L3 indices

On 05/12/2010 04:32 PM, H. Peter Anvin wrote:
> On 05/12/2010 04:19 PM, Greg KH wrote:
>>>
>>> So if K8_NB has failed initializing for some reason, we never go near
>>> the pci devs and the node_to_k8_nb_misc() calls since we effectively
>>> disable the L3 functionality.
>>>
>>> Thus the NULL pointer checks you remove in the patch below are
>>> superfluous, I agree, and I have already removed those in my tree along
>>> with the other improvements/fixes I'm working on right now.
>>
>> So, was there ever a patch applied that fixed the bug that Jiri found in
>> the stable kernels with this original patch that I could apply?
>>
> 
> Sounds like this patch in -tip should be promoted to mainline/stable...
> could the AMD people please confirm?
> 

Specifically, "waiting to hit mainline" is not an option since they are
currently queued for .35, but we need a minimal fix in .34 -- this is
the "stable backport".  If this "stable backport" is simply a subset of
the patch series then let me know which ones should be moved to urgent
and sent to Linus immediately.  I obviously don't have access to a setup
which can replicate this particular problem.

	-hpa
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