[CentOS] CentOS 5 - problem with kernel/process: task blocked for more than 120 seconds.

[m.roth at 5-cent.us]

Ali Corbin wrote:
> We've been having the same problem on centos 5.8, with a
> 2.6.18-308.1.1.el5 kernel.  It locked up twice and became unresponsive
and had to be
> rebooted.  After it came back up we discovered a number of instances of
> the 'task blocked' message - happening several times a day.
>
> We reflashed the raid controller's firmware last week, and the box has
> stayed up since.  I was about to declare victory when I double-checked the
> logs and found that we got three 'task blocked' messages overnight.  The
> times of the messages match up with the times that we were transferring
> large iso images to the box.

Been seeing that on 6.2, also, though I've not noticed them locking up
(the ones that have were in a cluster, and someone could have hosed
memory). It got less with the latest kernel, but I'm still seeing them
occasionally.

    mark