On 12/13, Matthew Wilcox wrote: > > On Thu, Dec 13, 2007 at 08:29:26PM +0300, Oleg Nesterov wrote: > > How is it possible that SIGKILL is blocked? > > I *think* it's possible that kernel threads may block SIGKILL. > And I think init (pid 1) gets SIGKILL blocked.
Yes. But this shouldn't matter because we can't ptrace them. /sbin/init doesn't block SIGKILL, but it can't be ptraced either. Also, SIGKILL is blocked only if kthread was created by kernel_thread() and then it does daemonize(). kthread_create()'ed kthreads don't block SIGKILL but ignore it. The latter behaviour is more correct, but we can't do the same for kernel_thread() threads. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
