linux-kernel - Re: [stable] Boot failure with 2.6.27.46 on Xeon E5620 (Westmere EP)

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Date:	Thu, 3 Jun 2010 13:50:22 -0400
From:	""S.Çağlar Onur"" <caglar@...Princeton.EDU>
To:	Greg KH <greg@...ah.com>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	"stable@...nel.org" <stable@...nel.org>,
	"hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Song, Youquan" <youquan.song@...el.com>
Subject: Re: [stable] Boot failure with 2.6.27.46 on Xeon E5620 (Westmere EP)

Hi Greg,

On Jun 3, 2010, at 12:40 PM, Greg KH wrote:

> On Wed, Jun 02, 2010 at 07:54:29PM -0400, "S.Çağlar Onur" wrote:
>> Hi Suresh,
>> 
>> On May 25, 2010, at 8:24 PM, Suresh Siddha wrote:
>> 
>>> On Tue, 2010-05-25 at 13:51 -0700, Greg KH wrote:
>>>> On Tue, May 25, 2010 at 04:32:16PM -0400, "S.Çağlar Onur" wrote:
>>>>> Hi Greg,
>>>>> 
>>>>> On May 25, 2010, at 11:53 AM, Greg KH wrote:
>>>>> 
>>>>>> On Tue, May 25, 2010 at 11:10:28AM -0400, "S.Çağlar Onur" wrote:
>>>>>>> Hi,
>>>>>>> 
>>>>>>> We are observing boot failures [1] & [2] on some of our servers (Dell
>>>>>>> r410) with 2.6.27-stable kernels. I found following commit in upstream
>>>>>>> tree via a quick search (but I haven't tried it yet) so I don't know
>>>>>>> whether I'm on the right track or not. 
>>>>>>> 
>>>>>>> Please let me know if anything else is needed...
>>>>>> 
>>>>>> Has any .27 kernel worked on these machines?  If so, can you narrow it
>>>>>> down to the patch that caused the problem?
>>>>> 
>>>>> I don't think any .27 kernel worked on those machines before. But in
>>>>> any case I'll try (I don't have a physical access to those machines as
>>>>> they are located in China) an older .27 release to see.
>>>> 
>>>> Ok, so it isn't a regression, which is what I want to know.
>>>> 
>>>> New hardware like this, probably will only work on newer kernel
>>>> versions, so please use those instead :)
>>> 
>>> I can't think of any known issues in 2.6.27 that can lead to this kind
>>> of boot failure on WSM-EP. Caglar, It will be nice if you can do git
>>> bisect between working and non-working kernels.
>> 
>> Neither 2.6.27 nor 2.6.27.45 not able to boot those servers, according
>> to the on-site admins the boot stuck at following stage[1].
> 
> Good, it's not a regression :)

Seems so :)

> Care to upgrade to a newer kernel version and see if that works?

I know 2.6.3x kernels boots those boxes without a problem, that was the first thing that I tried. 

In any case, I'll try to find a way to solve that problem as 2.6.27.46 is the kernel that we are using on some nodes of Planet-Lab. If you (any of you) have any ideas/patches/solutions please feel free to share it with me (and I'll let you know If I can find anything). 

> thanks,
> 
> greg k-h


Best regards,
--
S.Çağlar Onur <caglar@...princeton.edu>

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