Ubuntu: disk-io-stress-switcher test hangs

hwpack: https://snapshots.linaro.org/precise/hwpacks/vexpressdt-rtsm/31/hwpack_linaro-vexpressdt-rtsm_20120516-31_armhf_unsupported.tar.gz

The test hangs but the cluster switching is visible on the fast model clcd panel.

root@linaro-developer:~/core# ./disk-io-stress-switcher/disk-io-stress-switcher.sh -f little -c 0 -c 1 -c 2 -c 3 -s 1

Switching to little mode if not already in.

Start ..
Number of CPUs successfully brought up during boot = 4

Running /usr/local/bin/boot-a7.sh -c 0

cpu0 is big. Switching to LITTLE..
***bl-agitator***
CPU count: 4
CPU0: big freq 1000000 LITTLE freq 100000
CPU1: big freq 1000000 LITTLE freq 100000
CPU2: big freq 1000000 LITTLE freq 100000
CPU3: big freq 1000000 LITTLE freq 100000
Time elapsed: 0:00:00.002
cpu0 successfully switched to LITTLE.

SUCCESS!!
boot-a7 finished successfully

Switching to little mode if not already in.

Start ..
Number of CPUs successfully brought up during boot = 4

Running /usr/local/bin/boot-a7.sh -c 1

cpu1 is LITTLE

SUCCESS!!
boot-a7 finished successfully

Switching to little mode if not already in.

Start ..
Number of CPUs successfully brought up during boot = 4

Running /usr/local/bin/boot-a7.sh -c 2

cpu2 is LITTLE

SUCCESS!!
boot-a7 finished successfully

Switching to little mode if not already in.

Start ..
Number of CPUs successfully brought up during boot = 4

Running /usr/local/bin/boot-a7.sh -c 3

cpu3 is LITTLE

SUCCESS!!
boot-a7 finished successfully

Starting bigLITTLE switcher in the background

Running iozone -a -i 0 -i 2 -s 16m -V teststring
***bl-agitator***
CPU count: 4
CPU0: big freq 1000000 LITTLE freq 100000
CPU1: big freq 1000000 LITTLE freq 100000
CPU2: big freq 1000000 LITTLE freq 100000
CPU3: big freq 1000000 LITTLE freq 100000
Random switcher seed 0 limit 1000
Random switcher seed 0 limit 1000
Random switcher seed 0 limit 1000
Random switcher seed 0 limit 1000
        Iozone: Performance Test of File I/O
                Version $Revision: 3.397 $
                Compiled for 32 bit mode.
                Build: linux

        Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
                     Al Slater, Scott Rhine, Mike Wisner, Ken Goss
                     Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
                     Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
                     Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
                     Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
                     Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer.
                     Ben England.

        Run began: Wed May 16 07:06:26 2012

        Auto Mode
        File size set to 16384 KB
        Verify Mode. Pattern 6d6d6d6d
        Performance measurements are invalid in this mode.
        Command line used: iozone -a -i 0 -i 2 -s 16m -V teststring
        Output is in Kbytes/sec
        Time Resolution = 0.000002 seconds.
        Processor cache size set to 1024 Kbytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.
                                                            random random bkwd record stride
              KB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread
           16384 4cpu3 scaling_setspeed target 1000000 current 100000... FAIL
error on iteration 13 period 931
   52760 86283 26146 86901
           16384 8 56664 96840 27415 100211
           16384 16cpu0 scaling_setspeed target 1000000 current 100000... FAIL
error on iteration 55 period 86
   58789 103279 28004 108495
           16384 32 59807 106803 28427 112974
           16384 64 60506 108731 28591 114953
           16384 128 60775 109656 28679 115209
           16384 256 60951 110129 28727 113846
           16384 512 61027 110394 cpu2 scaling_setspeed target 100000 current 1000000... FAIL
error on iteration 170 period 734
   28748 110324
           16384 1024 61069 110550 [ 1441.527705] INFO: task mmcqd/0:566 blocked for more than 120 seconds.
[ 1441.534144] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1441.543406] INFO: task kworker/u:3:570 blocked for more than 120 seconds.
[ 1441.550220] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1441.559270] INFO: task jbd2/mmcblk0p2-:581 blocked for more than 120 seconds.
[ 1441.566423] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1441.574966] INFO: task rs:main Q:Reg:1136 blocked for more than 120 seconds.
[ 1441.582065] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1441.591930] INFO: task flush-179:0:1227 blocked for more than 120 seconds.
[ 1441.598811] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1441.609029] INFO: task iozone:2425 blocked for more than 120 seconds.
[ 1441.615449] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1561.617706] INFO: task mmcqd/0:566 blocked for more than 120 seconds.
[ 1561.624110] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1561.633372] INFO: task kworker/u:3:570 blocked for more than 120 seconds.
[ 1561.640186] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1561.649246] INFO: task jbd2/mmcblk0p2-:581 blocked for more than 120 seconds.
[ 1561.656389] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1561.664926] INFO: task rs:main Q:Reg:1136 blocked for more than 120 seconds.
[ 1561.672030] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
^CTime elapsed: 0:18:58.1000
Terminated because of SIG 2