[EMSCB] L4Linux + IPC

Rene Reusner rr13 at os.inf.tu-dresden.de
Wed May 3 12:50:10 CEST 2006

Oskar Senft(oskar.senft at crypto.rub.de)@2006.05.02 18:51:39 +0200:
> Hi all!
> We are using different Deamons running in L4Linux providing IPC services
> to other L4 task. With the most current DROPS CVS checkout, the L4Linux
> user processes freeze completely, as soon as an IPC call is executed
> which causes the process to sleep (eg. DICE IPC server loop).
> The L4Linux kernel seems to run, as it answers Ethernet/IP "ping"
> requests. A connection to a running SSH daemon no longer is possible and
> active SSH connection freeze, too.
> => Only L4Linux userland processes are frozen ?!?
> This did not happen with other version of L4Linux (eg. from January) and
> does not depend on the program we run in L4Linux - it happens with
> different applications that provide IPC services.

Mmmh, how old is your fiasco kernel?
Can you try your stuff with
the current fiasco kernel
and an older kernel (with the tag 'before_merge_new_ipc_path').


> Is this a problem with our settings for L4Env / L4Linux? Or could it be
> a bug in L4Linux?
> Do you have a test program that should run?
> Regards
> Oskar.
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