[CentOS] Problem with CentOS 4.3 on kernel and ipvsadm

Mon Jul 3 09:10:50 UTC 2006
Will McDonald <wmcdonald at gmail.com>

On 03/07/06, Alessio Cecchi <acecchi at telemaco.it> wrote:
> I have installed two CentOS 4.3 boxes with LVS (from
> http://mirror.centos.org/centos/4/csgfs/ ) but all boxes died withe this
> error frequently:
>
> kernel panic - not syncing: fs/block_dev.c:396: spin_lock
> (fs/block_dev.c:c0361c0) already locked by fs/block_dev.c/287.
>
> I have read from this thread http://threebit.net/mail-archive/centos/msg00243.html that this is an unsolved problem.
>
> So i have installed the kernel-2.6.9-39.EL from testing repo, but the box diedi with another error:
>

Johnny recommended installing kernel-2.6.9-34.19 from the CentOS
Testing repository, it resolves a bunch of the spinlock errors. NB:
it's a testing kernel and I was warned accordingly. :)

> Jul  2 16:40:40 lvs2 kernel: Bad page state at free_hot_cold_page (in process 'smtp', page c10a2140)
> Jul  2 16:40:40 lvs2 kernel: flags:0x20000014 mapping:00000000 mapcount:256 count:0
> Jul  2 16:40:40 lvs2 kernel: Backtrace:
>
> So LVS is unusable because after of no more hourse of running the kernel go to panic.
>

If you're already running kernel-2.6.9-34.19 and not
kernel-2.6.9-39.EL as you've stated above, I had problems getting
kernel-2.6.9-34.19 to boot on certain hardware. IBM eServer e300s to
be specific.

http://lists.centos.org/pipermail/centos/2006-May/064305.html

We switched all LVS boxes to Dell 1650s running kernel-2.6.9-34.19 a
few months back and haven't had any panics since (touch wood).

Will.