Hi Frank! > `Alien' means that this task is special handled by the Fiasco kernel. > In contrast to normal behaviour, L4 syscalls executed in the context > of an alien task generate exceptions just before and after the > L4 syscall. These exceptions allow the L4Linux server to set the > internal Linux state of that task to "disk wait" to prevent that > task from the Linux scheduling. Ok, thank you for the explanation. Where could I read more about that?
>> The above sample always blocks for >> exactly the IPC wait time. Then it runs again (accepting input, eg. from >> keyboard) and blocks again. It can be terminated by pressing CTRL-C as >> the input seems to be queued until the IPC wait timeout expired. > > I cannot check this as I'm currently work with a different branch, but > I would expect the exact behaviour as you describe. Or are _all_ > Linux applications frozen while this task waits for an incoming IPC? Yes, that is the problem. As I already described, neither switching to another Linux Console (ALT-F2, ...) nor SSH work when the process blocks - so I guess that all other processes (besides of the test and SSHD) are frozen, too. The freezing of the *single* process is a expected - sure. Regards Oskar. -- Sirrix AG security technologies - http://www.sirrix.com Oskar Senft eMail: [EMAIL PROTECTED] Tel +49 (681) 936 251 - 119 Fax +49 (681) 936 251 - 500 get public key from keyserver Fingerprint 6FC6 3E44 233F 7F4B 33C7 A8D0 2EDA F3BA B5A3 0BA4 This message may contain confidential and/or privileged information. If you are not the addressee, you must not use, copy, disclose or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. _______________________________________________ l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
