Public bug reported: So since my update to Hardy from Gutsy my Vostro 1500 will deadlock at seemingly random times. Three processes in particular (klogd, dd, and ksoftirqd) use 100% of my CPU and disk bandwidth. Also, it seems that my filesystem becomes read-only when this happens. Killing trackerd doesn't fix it, and I can only run programs that are still paged into memory at the time (basically anything I've run that session). I can't satisfactorily shut down or restart the computer, and killing xorg doesn't break the deadlock either. Usually I have to power-cycle the machine, and I must then boot in recovery mode or the gdm login screen never loads, leaving me at a blank screen.
I originally thought the problem was the same as bug #249123 <https://bugs.launchpad.net/bugs/249123>, but with Rob's help I was able to identify it as something different. This problem is not rare, apparently. I've found similar threads and bug reports about: https://bugs.launchpad.net/ubuntu/+source/sysklogd/+bug/291733 http://ubuntuforums.org/showthread.php?t=506891 The one from the ubuntu forums has almost exactly my problem, though my logfiles are not screwed up: I'll attach my kern.log so you can see it. I've found some forum posts that indicate that ksoftirqd starts to suck CPU time when a big file transfer happens, so maybe ksoftirqd has a separate issue from what I'm seeing: http://www.linuxquestions.org/questions/linux-general-1/ksoftirqd-cpu-usage-and-load-100-388745/ https://bugzilla.novell.com/show_bug.cgi?id=465039 http://lkml.indiana.edu/hypermail/linux/kernel/0407.3/0382.html Other people seem to have had problems with klogd eating CPU as well: https://bugs.launchpad.net/ubuntu/+source/sysklogd/+bug/291733 http://boards.fon.com/viewtopic.php?f=2&t=4485 Any help would be appreciated. I'd love to be able to stabilize my Hardy system before I consider upgrading to Intrepid. ** Affects: ubuntu Importance: Undecided Status: New ** Tags: 100percentusage dd deadlock hardy klogd ksoftirqd update -- Hardy: ksoftirqd, dd, klogd use 100% CPU, Disk https://bugs.launchpad.net/bugs/368324 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
