Hi,all: In UML,when do_fork was called,the new process P will be created in UML. Then in copy_thread_tt(in fact in start_fork_tramp)the corresponding process Q will be created in the host linux. I know the pid of the corresponding host process Q is appointed as the extern_pid of the UML process P. But then how will the 2 processes do next individually?
In UML,the function copy_thread_tt call start_fork_tramp, which cloned a thread. Once the thread was created it will run the outer_tramp function,in which cloned another thread. Once the second thread was created it will run the tramp function(fork_tramp or new_thread_proc). In fact the first thread is a temp one.it will kill itself later.Then why does UML clone 2 threads in copy_thread_tt? In UML,when the kernel_thread was called,the UML kernel thread P will be created in copy_process. And the corresponding host thread Q will be create in copy_thread_tt. Then the host thread Q will run its SIGUSR1 signal handler new_thread_handler,which will call run_kernel_thread function and exited at last. But I think it should be the UML kernel thread P that call run_kernel_thread function, any problems? Thanks a lot! Alex ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_idt12&alloc_id344&op=click _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
