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bbfa235
(Get the code!)
I have this problem with hibernating as well -- currently running:
Linux system76-pc 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux
Ubuntu 10.04
but I don't seem to have sr_mod loaded.
I've had variations of this problem through several upgrades. It seems to have started when I upgraded from 9.04->9.10->10.04 (9.10 ran so badly that I was going to do a fresh install, but decided to try 10.04 first). Previously it seemed that ksoftirqd/0 would go to 100% pretty quickly after booting after a hibernate, but now ksoftorqd/1 is going to 100% at some random-ish time after rebooting after hibernate (within a few hours). It rarely seems to do this while I am actually at my laptop, but nothing odd seems to have been in kern.log or messages during the duration of time that it happens.
If there is anything additional information that may be helpful please let me know.