On 7/7/05, Farkas Levente <lfarkas@xxxxxxxxx> wrote:
> hi,
> after we switch our servers from centos-3 to centos-4 (aka. rhel-4) one
> of our server always crash once a week without any oops. this happneds
> with both the normal kernel-2.6.9-11.EL and
> kernel-2.6.9-11.106.unsupported. after we change the motherboard, the
> raid contorller and the cables too we still got it. finally we start
> netdump and last but not least yesterday we got a crash log and a core
> file. it seems there is a bug in the raid5 code of the kernel.
> this is our backup server with 8 x 200GB hdd in a raid5 (for the data)
> plus 2 x 40GB hdd in raid1 (for the system) with 3ware 8xxx raid
> contorller, running. i attached the netdump log of the last crash.
> how can i fix it?
> yours.
>
Hi,
I have seen similar (but not quite the same) in the raid code on RHEL
3 kernels. They typically have occured due to a race condition
between something updating the linked lists of raid devices and
something trying to read them. For RHEL 3, my co-workes and I found
where one particular race condition was fixed in 2.6 kernel and back
ported to RHEL 3 kernel. Ultimately this patch was placed in one of
the updates for the RHEL 3 kernel.
Anyway, it is likely your problem is yet another race condition. What
I would suggest doing is get a box configured with true RHEL 4 and
reproduce. Once reproduced file a bugzilla report with redhat. We
have had very good success with this approach with a number of kernel
bugs we found in the Centos 3/RHEL 3 kernels. Fixes have not always
come quickly, but they generally do come.
Good Luck...james
> --
