Sorry, haven't checked this thread in a while.  Finals and all that.

I'm pretty sure nobody's logging into my machine remotely, but I'm not
quite sure how I'd check, short of obsessively checking "who".  I do
have several apache2 instances running:

$ ps -e | grep apache
 6069 ?        00:00:00 apache2
25435 ?        00:00:00 apache2
25436 ?        00:00:00 apache2
25437 ?        00:00:00 apache2
25438 ?        00:00:00 apache2
25439 ?        00:00:00 apache2

I'm not sure what they're there for.

I don't have BOINC installed, so that's not the problem

Oddly enough, some of the "symptoms" of this problem have occurred by
themselves recently.

For instance, yesterday I suddenly lost my entire filesystem.  Every
time I attempted to run something that I hadn't already run that
session, I got something like:

bash: - /usr/bin/perl: input/output error

However, I didn't have klogd or ksoftirqd eating up my CPU and disk
throughput.  I was just suddenly locked out.  I can only think that the
root partition must have been unmounted somehow, and only the programs
that were paged into memory at the time could still be run.  I couldn't
save anything to the disk either.

After some looking around on the net, I saw at least one reference
saying that having input/output errors like mine could be indicative of
a bad optical or hard drive (most of the bugreports were problems with
USB or CD/DVD drives).  I've since run smartctl -H and smartctl --all
against /dev/sda (my hdd):

$ sudo smartctl -H /dev/sda
smartctl version 5.38 [i686-pc-linux-gnu] Copyright (C) 2002-8 Bruce Allen
Home page is http://smartmontools.sourceforge.net/

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

I'll attach the output of smartctl --all /dev/sda with this message so
it doesn't take up lots of room here.  The upshot is my hard drive seems
healthy.  I'm glad it's not faulty hardware, but it also means I still
don't know what's wrong.

Also, recently I had a similar deadlock, where my CPU usage went through
the roof, but in this case after a little bit of me trying to figure out
what was going on, Xorg died, and I was left with a blank screen and
blinking cursor (the machine was unresponsive).  It could be that I have
several problems here that are no longer occurring together that I
thought were some nastier bug.

Thanks in advance for any insight you can provide,
~jdacronym

** Attachment added: "output of 'smartctl --all /dev/sda'"
   http://launchpadlibrarian.net/27341284/smartctl.all.output

-- 
Hardy: ksoftirqd, dd, klogd use 100% CPU, Disk
https://bugs.launchpad.net/bugs/368324
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