[CentOS-devel] CBS kernel-debuginfo packages

Tue Jun 7 22:29:28 UTC 2016
Johnny Hughes <johnny at centos.org>

On 06/07/2016 03:18 PM, Wayne Betts wrote:
> On 6/7/2016 11:22 AM, Johnny Hughes wrote:
>> On 06/07/2016 09:56 AM, Wayne Betts wrote:
>>> I'm not sure if this is an appropriate place for this question - please gently
>>> steer me to a better place if you think there is one.
>>>
>>> I have a machine using a kernel package from the CentOS Community Build System
>>> (specifically kernel-3.18.21-16.el6 from
>>> http://cbs.centos.org/koji/buildinfo?buildID=4757, but my question applies to
>>> other CBS kernel versions as well from what I can tell)
>>>
>>> The machine is crashing with some regularity on Sunday mornings.  Looking at a
>>> kdump core dump might help narrow down the cause of the crashes.
>>>
>>> But the CBS kernel packages don't appear to include kernel-debuginfo packages,
>>> and the kernel.spec file appears to me (a non-expert for sure) to have had the
>>> necessary pieces removed, so I don't know how to rebuild from the srpm and get
>>> the debuginfo packages that way either.
>>>
>>> If someone could help me find or build the kernel-debuginfo package, it will be
>>> appreciated.
>>>
>>
>> Those kernel packages do not build debuginfo files.  That is also not
>> nearly the newest package.  There is a 3.18.34-20 package here:
>>
>> http://cbs.centos.org/koji/buildinfo?buildID=11179
>>
>> You can see the packages that are built and look at all the build logs
>> and root logs, etc, by going to:
>>
>> http://cbs.centos.org/koji/
>>
>> and adding kernel in the search box .. then picking the version you are
>> interested in.
>>
>> But, as you can see in the above link, there are no debuginfo files
>> produced.
>>
>> However, we do take updates directly from the kernel.org 3.18 LTS kernel
>> tree, so there are a lot of things that have been fixed (and a lot of
>> security updates) since 3.18.21 .. in fact you can see all of the
>> changelogs starting with :
>>
>> https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.22
>>
>> and using 23, 24. 25, 26, 27, 28, 29, 30, 31, 32, 33, and 34 for the
>> last number to review all the changelogs.
>>
>> Thanks,
>> Johnny Hughes
>>
> 
> 
> Thank you for your reply Johnny.  I tried the latest,
> kernel-3.18.34-20.el6.x86_64, and that backfired - attempting to read from our
> ceph cluster triggers an immediate crash.
> 
> The behaviour of crashing on cephFS access starts at 3.18.30-20 in the CBS kernels.
> 
> Meanwhile, 3.18.25-20 crashes early at boot, failing to mount the root
> filesystem (so I don't know if the Ceph crash happens at this kernel version).
> 
> I'm leaving the system live now at 3.18.25-19.  Assuming this hasn't introduced
> some additional problem(s), it will be a while before we know if this has
> reduced or eliminated the crashes we are experiencing.
> 

I have not specifically tried to enable ceph in those kernels .. is
there anyone on the Storage sig who would take a look at the x86_64
kernek config file and recommend changes to enable ceph:

Here is the config file if someone from CEPH can help:

https://raw.githubusercontent.com/hughesjr/xen-kernel/master/SOURCES/config-x86_64

Thanks,
Johnny Hughes



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