[maemo-users] Maemo IU locking up

From: Marius Gedminas marius at pov.lt
Date: Fri May 30 18:31:35 EEST 2008
On Thu, May 29, 2008 at 06:26:56PM -0400, Torsten Hoefler wrote:
> I am running the newest OS2008 on a N810. And I have problems with the
> OS (I guess). The IU locks up from time to time with 100% CPU load (the
> CPU load applet shows full system load) and pretty much stops
> responding. I can not open any windows anymore (it just draws the white
> background after a delay of >30 seconds but no widgets).
> This happens from time to time (after several hours) also when I don't
> use the device (also in offline mode), i.e., it's just sitting around
> doing nothing. Something seems to use the CPU extensively because the
> battery is drained quickly (2-3hrs) after it starts.
> I tried to debug via ssh, and see a constant system load >2 but no
> process besides "maemo-launcher" consuming about 20% (why does this
> process run all the time? What does it do?). I also see Xomap from time
> to time (what does this do?). It looks like top (running as root) is not
> showing all the processes? Is this possible?

I've noticed that the kernel itself sometimes uses a lot of CPU to
perform JFFS2 garbage collection, a while after you write/delete a lot
of files.  If I'm not mistaken, and that's the case, it could explain
why the CPU is 100% busy, but top doesn't see any process keeping it
that busy.

Check kernel messages with dmesg, perhaps there will be some clues

Marius Gedminas
Perl is hard for most people to write. They write PERL or Pearl.
        -- Abigail
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