[CentOS] centos.plus kernels

Tue Feb 24 19:43:01 UTC 2009
Akemi Yagi <amyagi at gmail.com>

2009/2/24 Rob Kampen <rkampen at kampensonline.com>:
>
> Alain Terriault wrote:

>> I experienced 3 problems that i am 99% sure related to
>> kernel-2.6.18-92.1.22.el5.centos.plus.x86_64.rpm

You cannot be sure 99% until you can reproduce the problems...

>> #1 on a nfs server
>> problem : constantly appearing on all my machines "lockd: server
>> 192.168.10.2 not responding, timed out"
>>
>> solution : move to kernel-2.6.18-92.1.22.el5, never saw that message
>> again.
>
> I run a CentOS  2.6.18-92.1.22.el5 #1 SMP Tue Dec 16 11:57:43 EST 2008
> x86_64 x86_64 x86_64 GNU/Linux kernel serving NFS with no issues. I have a
> number of CentOS 2.6.18-92.1.22.el5.centos.plus #1 SMP Wed Dec 17 10:49:19
> EST 2008 x86_64 x86_64 x86_64 GNU/Linux workstations that have no issues as
> NFS clients. No experience of plus kernel used on servers.

I have been running 2.6.18-92.1.22.el5.centos.plus both on my own
workstations and as VMware guests.  The real (host) machine works as
an nfs server as well.  I have never seen any issue there.

>> #2 on the same nfs server
>> problem : it is a important server for our department, so i rarely do a
>> "shutdown". when i moved to kernel-2.6.18-92.1.22.el5 the "/sbin/shutdown -h
>> now" did not succeed, i had to press the power button to shut it down.

I have not seen this behavior either on any of the machines running a
centosplus kernel.

>> #3 on a vmware virtual machine
>> problem :
>> Feb 15 18:55:41 www kernel: nscd[5631]: segfault at 00002b89938405c0 rip
>> 00002b891f30f7c5 rsp  00000000411256d0 error 4
(snip)
>> I did not take that many notes or investigate that much, so i can not tell
>> you much more. but i will do my best to reply to direct emails.
>> I am also not in a position to reproduce those problems.
>> I sent this post because i am concern they may be serious bugs in the
>> centos.plus kernels.

Unless this can be reproduced by you or other users, it will be very
difficult to even identify it as a bug.  Troubleshooting is nearly
impossible.  The centosplus kernel has several drivers and other
options enabled, but otherwise its behavior should be the same as the
distro kernel.  Yes, some of those options might be involved, but
nothing is immediately obvious as to the cause of the issues you
experienced.

Akemi