Re: Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots.

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On 04/19/2017 12:18 PM, PJ Welsh wrote:
> 
> On Wed, Apr 19, 2017 at 5:40 AM, Johnny Hughes <johnny@xxxxxxxxxx
> <mailto:johnny@xxxxxxxxxx>> wrote:
> 
>     On 04/18/2017 12:39 PM, PJ Welsh wrote:
>     > Here is something interesting... I went through the BIOS options and
>     > found that one R710 that *is* functioning only differed in that "Logical
>     > Processor"/Hyperthreading was *enabled* while the one that is *not*
>     > functioning had HT *disabled*. Enabled Logical Processor and the system
>     > starts without issue! I've rebooted 3 times now without issue.
>     > Dell R710 BIOS version 6.4.0
>     > 2x Intel(R) Xeon(R) CPU L5639  @ 2.13GHz
>     > 4.9.20-26.el7.x86_64 #1 SMP Tue Apr 4 11:19:26 CDT 2017 x86_64 x86_64
>     > x86_64 GNU/Linux
>     >
> 
>     Outstanding .. I have now released a 4.9.23-26.el6 and .el7 to the
>     system as normal updates.  It should be available later today.
> 
>     <snip>
> 
>  
> I've verified with a second Dell R710 that disabling
> Hyperthreading/Logical Processor causes the primary xen booting kernel
> to fail and reboot. Consequently, enabling allows for the system to
> start as expected and without any issue:
> Current tested kernel was: 4.9.13-22.el7.x86_64 #1 SMP Sun Feb 26
> 22:15:59 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
> 
> I just attempted an update and the 4.9.23-26 is not yet up. Does this
> update address the Hyperthreading issue in any way?
> 

I don't think so .. at least I did not specifically add anything to do so.

You can get it here for testing:

https://buildlogs.centos.org/centos/7/virt/x86_64/xen/

(or from /6/ as well for CentOS-6)

Not sure why it did not go out on the signing run .. will check that server.



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