I don't exactly know what this message means but I suspect that it has
something to do with the UML kernel,

exactly

If you indeed see any problem apart from this (bogus) warning feel free to report, but otherwise I wouldn't care if I were you.

Indeed, I'm not quite sure about my Problem. As mentioned in my last message, I tried to run OpenWBEM in an UML environment. The UML and host systems are very similar: Both running 2.6.14.2, same distribution (Debian sid), same version of compilers (gcc 4.0.2), same directory structure, ... It takes me about one hour to compile OpenWBEM, one of the executables is called owcimomd. This program executes fine on the host system but it segfaults on the UML machine and I don't know why. Even if I compile the programs on the host and copy them to the UML machine it won't work. When I compile them inside the UML box, owcimomd will segfault as well, but executed on the host there seems to be no error. Because this program runs on one platform and segfaults on another that is nearly the same makes me suspect the UML kernel - that's also what the OpenWBEM developers told me in their mailing list. I did some debugging, unfortunately it does not help me, but maybe you can tell me what this debugging information means.
I created a backtrace with gdb that looks like this:

#0  0x00000000 in ?? ()
#1  0x40020cfd in start_thread () from /lib/tls/libpthread.so.0
#2  0x407f113e in clone () from /lib/tls/libc.so.6

And I did a strace as well:

[...]
write(1, "OW_ThreadPool", 13)           = 13
write(2, ".", 1.)                        = 1
rt_sigaction(SIGFPE, {0x811edd0, [FPE], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGFPE, {SIG_DFL}, {0x811edd0, [FPE], SA_RESTART}, 8) = 0
rt_sigaction(SIGTRAP, {0x811edd0, [TRAP], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGTRAP, {SIG_DFL}, {0x811edd0, [TRAP], SA_RESTART}, 8) = 0
rt_sigaction(SIGBUS, {0x811edd0, [BUS], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGBUS, {SIG_DFL}, {0x811edd0, [BUS], SA_RESTART}, 8) = 0
rt_sigaction(SIGSEGV, {0x811edd0, [SEGV], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGSEGV, {SIG_DFL}, {0x811edd0, [SEGV], SA_RESTART}, 8) = 0
rt_sigaction(SIGABRT, {0x811edd0, [ABRT], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGABRT, {SIG_DFL}, {0x811edd0, [ABRT], SA_RESTART}, 8) = 0
rt_sigaction(SIGFPE, {0x811edd0, [FPE], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGFPE, {SIG_DFL}, {0x811edd0, [FPE], SA_RESTART}, 8) = 0
rt_sigaction(SIGTRAP, {0x811edd0, [TRAP], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGTRAP, {SIG_DFL}, {0x811edd0, [TRAP], SA_RESTART}, 8) = 0
rt_sigaction(SIGBUS, {0x811edd0, [BUS], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGBUS, {SIG_DFL}, {0x811edd0, [BUS], SA_RESTART}, 8) = 0
rt_sigaction(SIGSEGV, {0x811edd0, [SEGV], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGSEGV, {SIG_DFL}, {0x811edd0, [SEGV], SA_RESTART}, 8) = 0
rt_sigaction(SIGABRT, {0x811edd0, [ABRT], SA_RESTART}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGABRT, {SIG_DFL}, {0x811edd0, [ABRT], SA_RESTART}, 8) = 0
mmap2(NULL, 8388608, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x4085d000
mprotect(0x4085d000, 4096, PROT_NONE)   = 0
clone(child_stack=0x4105c4c4, flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED, parent_tidptr=0x4105cbf8ptrace: umoven: No such process
, tls=0xbf722afc, child_tidptr=0x4105cbf8) = 1160
trace: ptrace(PTRACE_SYSCALL, ...): No such process

Maybe I need to set some kernel options for the UML-Kernel - but I got no clue which one might be missing... Maybe it has something to do with the SKAS-patch? Tomorrow I'll try to build a kernel without skas, just for testing purposes... Well, as you have already noticed, I've really no idea what to do...

Thanks very much in advance,
Christoph


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