I too just ran into this bug this morning!  My system did not require a
reboot, though I did restart my myth TV backend as a precaution.
(System still up and running now, for what it's worth.)


uname -a:

Linux Mythtery 2.6.28-11-generic #38-Ubuntu SMP Fri Mar 27 10:01:17 UTC
2009 x86_64 GNU/Linux


I will attach the dmesg log and lspci logs as requested.


~$ sudo mdadm --query --detail /dev/md0
/dev/md0:
        Version : 00.90
  Creation Time : Thu Mar 26 12:16:36 2009
     Raid Level : raid1
     Array Size : 14651136 (13.97 GiB 15.00 GB)
  Used Dev Size : 14651136 (13.97 GiB 15.00 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Mon Apr  6 10:42:47 2009
          State : active
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

           UUID : 30e55caa:7b37846c:2f942441:c20bfe15
         Events : 0.121

    Number   Major   Minor   RaidDevice State
       0       8       33        0      active sync   /dev/sdc1
       1       8       17        1      active sync   /dev/sdb1
       2       8        1        2      active sync   /dev/sda1
       3       8       49        3      active sync   /dev/sdd1


~$ sudo mdadm --query --detail /dev/md1
/dev/md1:
        Version : 00.90
  Creation Time : Thu Mar 26 12:19:24 2009
     Raid Level : raid5
     Array Size : 2883386112 (2749.81 GiB 2952.59 GB)
  Used Dev Size : 961128704 (916.60 GiB 984.20 GB)
   Raid Devices : 4
  Total Devices : 4
Preferred Minor : 1
    Persistence : Superblock is persistent

    Update Time : Mon Apr  6 09:02:59 2009
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 64K

           UUID : 40b52493:7870492f:792c47d7:3ad308e9
         Events : 0.48

    Number   Major   Minor   RaidDevice State
       0       8        3        0      active sync   /dev/sda3
       1       8       19        1      active sync   /dev/sdb3
       2       8       35        2      active sync   /dev/sdc3
       3       8       51        3      active sync   /dev/sdd3


~$ sudo blkid
/dev/sda1: UUID="aa5ce530-6c84-377b-4124-942f15fe0bc2" TYPE="mdraid" 
/dev/sda2: TYPE="swap" UUID="1bb03a5b-012d-43cf-a23b-1bcc191f1210" 
/dev/sda3: UUID="9324b540-2f49-7078-d747-2c79e908d33a" TYPE="mdraid" 
/dev/sdb1: UUID="aa5ce530-6c84-377b-4124-942f15fe0bc2" TYPE="mdraid" 
/dev/sdb2: TYPE="swap" UUID="54be76a6-fdfa-4534-a57b-a011320797d2" 
/dev/sdb3: UUID="9324b540-2f49-7078-d747-2c79e908d33a" TYPE="mdraid" 
/dev/sdc1: UUID="aa5ce530-6c84-377b-4124-942f15fe0bc2" TYPE="mdraid" 
/dev/sdc2: TYPE="swap" UUID="8e18c25c-8b70-4621-9886-faf06e947c07" 
/dev/sdc3: UUID="9324b540-2f49-7078-d747-2c79e908d33a" TYPE="mdraid" 
/dev/sdd1: UUID="aa5ce530-6c84-377b-4124-942f15fe0bc2" TYPE="mdraid" 
/dev/sdd2: TYPE="swap" UUID="af25dc05-12af-429d-91bd-5f1058ddf92f" 
/dev/sdd3: UUID="9324b540-2f49-7078-d747-2c79e908d33a" TYPE="mdraid" 
/dev/md0: UUID="5c27feed-09cc-4233-9d27-282f5d6b787c" TYPE="ext3" 
/dev/md1: UUID="07a45363-1129-49df-a054-b34a44f50695" TYPE="jfs" 

There was hard drive activity when this happened, but not a TON going
on.  (Just watching TV.)  I've pounded these disks a LOT harder when
transcoding, for example.


If there is anything else you guys need/want, feel free to let me know!  
(Especially since the system has NOT been rebooted!)


** Attachment added: "Dmesg output"
   http://launchpadlibrarian.net/24876455/dmesg.log

-- 
BUG: soft lockup - CPU#1 stuck for 61s! [xfs_fsr:948]
https://bugs.launchpad.net/bugs/348218
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