Hi,

I experienced the same problems on two identical servers at the same time:
Oct  5 01:06:01 server01 kernel: [472687.165519] md: data-check of RAID array 
md0
Oct  5 01:06:01 server01 kernel: [472687.165525] md: minimum _guaranteed_  
speed: 1000 KB/sec/disk.
Oct  5 01:06:01 server01 kernel: [472687.165528] md: using maximum available 
idle IO bandwidth (but not more than 200000 KB/sec) for data-check.
Oct  5 01:06:01 server01 kernel: [472687.165533] md: using 128k window, over a 
total of 48829440 blocks.
Oct  5 01:06:01 server01 kernel: [472687.166340] md: delaying data-check of md1 
until md0 has finished (they share one or more physical units)
Oct  5 01:07:47 server01 syslogd 1.5.0#1ubuntu1: restart.

and:

Oct  5 01:06:01 server02 kernel: [284514.605756] md: data-check of RAID array 
md0
Oct  5 01:06:01 server02 kernel: [284514.605761] md: minimum _guaranteed_  
speed: 1000 KB/sec/disk.
Oct  5 01:06:01 server02 kernel: [284514.605764] md: using maximum available 
idle IO bandwidth (but not more than 200000 KB/sec) for data-check.
Oct  5 01:06:01 server02 kernel: [284514.605769] md: using 128k window, over a 
total of 48829440 blocks.
Oct  5 01:06:01 server02 kernel: [284514.606738] md: delaying data-check of md1 
until md0 has finished (they share one or more physical units)
Oct  5 01:07:34 server02 syslogd 1.5.0#1ubuntu1: restart.

Both servers are Dell PowerEdge R200 with 4GB of RAM and 2x 400GB Sata
disks. Both servers run DRBD (primary/primary) and OpenVZ. They had no
load at this time. Kernel is: Linux serer01.XXXXXXXX 2.6.24-19-openvz #1
SMP Wed Aug 20 22:07:43 UTC 2008 x86_64 GNU/Linux.

** Attachment added: "lspci -vvnn"
   http://launchpadlibrarian.net/18287063/lspci-vvnn.log

-- 
RAID1 data-checks cause CPU soft lockups
https://bugs.launchpad.net/bugs/212684
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