Hello, Recently, I have completed support for checkpointing processes with multiple threads by saving and restoring signal information. That included keeping information on thread's signal mask and alternate stack for signal handlers (apparently, signal stack info wasn't saved even for the main thread). That required changing of the ckpt_siginfo structure. However, since it is used only by coredump save and checkpoint restore code there won't be any serious compatibility consequences.
I've also spent some time on testing to ensure that everything works well regardless of the hardware architecture (x86, amd64, and vkernels). Since I haven't found any problems I am now going to (a week earlier than planned) to start working on reopening network interface used by vkernel and restoring its configuration. Paweł
