I am experiencing "sort off" the same unusual problems as Jorge, although
a little different possibly because of my SMP hardware makeup.

OK, I have been trying to isolate the SMP application hangs I am
experiencing. I have noticed that most are GTK based. Also X
mouse control goes absolutely crazy, "move mouse up" it picks
a remote app, move click mouse (Left Button), the mouse then "moves down".
That type of craziness.  

Anyhow, while the OS doesn't hang totally, I have noticed that some
apps go into 95-99% cpu usage when I look at "top". Some apps even
seg fault after the system is up about 48 hours++ old. Strace and DDD 
both show the apps are "returning" or have reached the "end" of the
main() routines. Sort of like they are unable to loop (within main()) or exit 
correctly.
Loop is the main problem with GTK apps (XCallerID, occasionally GIMP)
and small user written apps have a problem exiting altogether.

Its is OK in uni-processor mode (well as far as time testing allows).

I have tried the new patch#2 from Ingo, but it didn't seem to make any
difference though.

So, Tyan SMP PPro 150Mhz, 128Mb, Buslogic SCSI and IDE drives etc etc...
H/W very stable running 18 months++ now.

Problems still remain on 2.2.0-final (RH5.2), so I am very especially 
suspicious of the
RH5.2 libraries (lib6c etc) because I only upgraded to RH5.2 distribution
last week, I had no problems with RH5.0 distribution with 2.2.0-final at
all, running same config, apps etc.

Memory leaks a possibility ? Library problems ? I would have thought would 
have shown up in unprocessor mode as well, but maybe it is and just doesn't
get to the context switching point that the SMP mode goes.

I will endeavor to isolate problems further. Comments ???

Cheers, Grahame  
-- 

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Sydney Linux User Group - Coordinator &  Member (SLUG) 
see http://www.slug.org.au for details on activities
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