On Wed, 2008-10-22 at 11:25 +0200, Louis Rilling wrote: > Do you checkpoint uninterruptible syscalls as well? If only interruptible > syscalls are checkpointed, I'd say that either this syscall uses ERESTARTSYS or > ERESTART_RESTARTBLOCK, and then signal handling code already does the trick, or > this syscall does not restart itself when interrupted, and well, this is life, > userspace just sees -EINTR, which is allowed by the syscall spec. > Actually this is how we checkpoint/migrate tasks in interruptible syscalls in > Kerrighed and this works. > > Louis > I don't know Kerrighed internals but I understand you perform checkpoint with a signal handler. Right ? This approach has a huge benefit: the signal handling code do all the arch dependant stuff to save registers in user memory. -- Gregory Kurz gkurz@xxxxxxxxxx Software Engineer @ IBM/Meiosys http://www.ibm.com Tel +33 (0)534 638 479 Fax +33 (0)561 400 420 "Anarchy is about taking complete responsibility for yourself." Alan Moore. _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
