[Openmosix-devel] Re: [openMosix-general] OpenMosix Configuration [Kernel Bug] issues. . .

[J S <g1p...@ya...>]

Hi All,

After some discussion on the #openmosix channel on
irc,  I found out that the behavior with the openmosix
tools I described below is more likely due to a bug in
the kernel patch than with a configuration issue,
which I had thought previously.  I was able to get a
backtrace of openmosixview for more debugging
information:

Program received signal SIGBUS, Bus error.
[Switching to Thread 16384 (LWP 2199)]
0x409c2c2f in strlen () from /lib/libc.so.6
(gdb) bt
#0  0x409c2c2f in strlen () from /lib/libc.so.6
#1  0x4026dd3c in qt_write_dib () from
/usr/lib/libqt-mt.so.3
#2  0x4026e5ef in qt_write_dib () from
/usr/lib/libqt-mt.so.3
#3  0x402610f9 in QImage::QImage () from
/usr/lib/libqt-mt.so.3
#4  0x402a6807 in QPixmap::QPixmap () from
/usr/lib/libqt-mt.so.3
#5  0x080663df in QString::~QString ()
#6  0x40962dc6 in __libc_start_main () from
/lib/libc.so.6
#7  0x0804f0e1 in ?? ()

More output at: http://www.clusterix.net/bt.txt

This test was also with the 2.4.27 migshm patch. If
you need any more information about this bug, just let
me know.

Thanks,
J Silverman

--- J S <g1p...@ya...> wrote:

> Hi All,
> 
> I'm currently working on the next release of
> Clusterix; however, I'm having some major problems
> with OpenMosix that I just can't seem to fix.  
> 
> The default install of the userland tools added some
> "mosrun -h" entries in inittab, but with all of
> them,
> all but one process was then subsequently locked
> from
> migration, including any new processes.  If I remove
> one mosrun entry from one line (which also starts
> the
> main script that loads the rest of Clusterix), all
> but
> one process is able to migrate from there.  I know
> neither is correct, from working on my installed
> system, which shows some locked processes (mostly
> daemons) and the rest unlocked.  
> 
> Now, when I try it without the one mosrun command in
> inittab, everything seems to work correctly except
> for
> the openmosixview tools.  If I try to load one tool
> on
> a low powered machine within a cluster, it seems to
> try to migrate it before it fully loads and then
> causing it to segfault (sometimes the whole kernel
> oops's).  I have no idea why its behaving this way,
> but any help would be appreciated so I can release
> the
> next Clusterix :-)
> 
> Btw, here is some key info:
> 
> Kernel 2.4.27 (patch-2.4.27-om-20041102)
> Most current userland tools
> Most current openmosixview thats in Debian unstable
> 
> Thanks,
> J Silverman
> 
> 
> 		
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