klogd using high CPU

One of my servers has a process running called klogd which is running at 99.9% CPU according to top (output from top below)

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                                                                                                                               
 3932 klog      25   0  5932 2220   16 R 99.7  0.1 162333:28 klogd                                                                                                                                  
    1 root      15   0  4100  584  300 S  0.0  0.0   6:10.66 init                                                                                                                                   
    2 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/0                                                                                                                            
    3 root      34  19     0    0    0 S  0.0  0.0   0:00.33 ksoftirqd/0                                                                                                                            
    4 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 watchdog/0                                                                                                                             
    5 root      10  -5     0    0    0 S  0.0  0.0   0:03.63 events/0                                                                                                                               
    6 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 khelper                                                                                                                                
    7 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 kthread                                                                                                                                
   29 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 kblockd/0                                                                                                                              
   30 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 kacpid                                                                                                                                 
   31 root      10  -5     0    0    0 S  0.0  0.0   0:00.00 kacpi_notify

Iv had a Google and this seems to be a standard process for handling logging. None of the log files seem to be really big and there's not too much else happening on the server.

The operating system is Ubuntu 9.04

I've seen this a lot in version 2.6.32

run /etc/init.d/klogd restartto fix the 99% cpu.

The real fix is to update your kernel.

There was a bug when reading /proc/kmsg pseudo file. Hopefully this bug is fixed by now. Here is Linus' take on the problem (quite funny)