Comment 8 for bug 567660

It is definitely related to suspend. It does not happen all the time though as my experiments show. Worst of all I am not able to suspend any longer once the ksoftirqd is consuming 100%

Tasks: 181 total, 3 running, 178 sleeping, 0 stopped, 0 zombie
Cpu(s): 17.7%us, 4.6%sy, 0.0%ni, 67.1%id, 2.3%wa, 0.1%hi, 8.1%si, 0.0%st
Mem: 3645260k total, 1899984k used, 1745276k free, 149636k buffers
Swap: 3999992k total, 0k used, 3999992k free, 1019436k cached

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
    4 root 20 0 0 0 0 R 101 0.0 12:04.57 ksoftirqd/0
 5746 root 20 0 145m 52m 21m S 6 1.5 1:21.82 Xorg
 5971 shura 20 0 211m 18m 10m S 2 0.5 0:01.82 gnome-terminal
 7770 shura 20 0 19212 1344 940 R 2 0.0 0:00.01 top
.....

Please let me know what kind of info I could provide.