On Tue, Dec 10, 2013 at 10:34:31PM +0100, Oleg Nesterov wrote: > On 12/10, Dave Jones wrote: > > > > On Tue, Dec 10, 2013 at 09:35:59PM +0100, Oleg Nesterov wrote: > > > > > > I am looking at the first message and I can't understand who stuck > > > "at exit". > > > > > > The trace shows that the task with pid=10818 called sys_futex() ? > > > > > > Perhaps "exit" means the userspace paths? > > > > pid 1131 is wait()'ing for 10818 to exit > > > > pid 1130 is periodically sending SIGKILL to 10818 because it's gotten > > tired of waiting. 10818 is ignoring these because it's stuck in a loop > > somewhere in the kernel. > > OK, thanks. So it doesn't return to user-space. > > could you do > > cd /sys/kernel/debug/tracing/ > echo 10818 >> set_ftrace_pid > echo function_graph >> current_tracer > echo 1 >> tracing_on > > and look into "trace" file to find out how exactly it loops?
http://codemonkey.org.uk/junk/trace Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
