As they say, ``twice is concidence'' - just did it again with a current 
kernel.

> How do I put this?
> 
> 512mb PPC Ti500, head of 1.5 userland, currentish kernel from ~apr 30, tmpfs.
> 
> When running constant builds (FSF toolchain code) I'm noticing that an SH process occasionally gets stuck chewing up CPU time.
> 
> First few times this happend, I tried killing the SH process but with tragic consequences - the machine locked up.
> 
> The most recent time this happened I decided it is likely better to just reboot the machine.  So I started quitting everything and, to my suprize, quitting mozilla unwedged the SH process and my build resumed.
> 
> I guess the SH is busy waiting on some sort of resource that mozilla was hogging.  Any hints as to how to figure out what that resource is?
> 
> Andrew