Hello Dave, On Mon, 2010-04-26 at 10:29 -0400, Dave Anderson wrote: > I'd prefer not to leave them out of the various internal task arrays, > especially the active_set[] array. Regardless of their on/offline > status, they do still exist as tasks, have runqueues, etc. Ok, fine. > If you're just worried about "bt -a", then why not just catch > the offline status in the for loop inside "if (active)" section > of cmd_bt()? Good idea! The following attached patch also works for me. Michael

--- kernel.c | 2 ++ 1 file changed, 2 insertions(+) --- a/kernel.c +++ b/kernel.c @@ -1989,6 +1989,8 @@ cmd_bt(void) free_all_bufs(); continue; } + if (!(kt->cpu_flags[c] & ONLINE)) + continue; if ((tc = task_to_context(tt->panic_threads[c]))) { pc->flags |= IN_FOREACH; DO_TASK_BACKTRACE();