Messages in this thread | | | Date | Wed, 10 Aug 2016 15:43:45 -0700 | From | Andrew Morton <> | Subject | Re: [PACTH v1] kernel/hung_task.c: Dump all UNINTERUPTIBLE tasks |
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On Tue, 2 Aug 2016 11:23:11 -0400 robert.foss@collabora.com wrote:
> From: Aaron Durbin <adurbin@chromium.org> > > When the panic path is taken for khungtaskd dump all > tasks with the UNINTERUPTIBLE state. That way, any > inter-dependent tasks that caused one another to hang > will be saved in the crash output. > > ... > > --- a/kernel/hung_task.c > +++ b/kernel/hung_task.c > @@ -122,6 +122,8 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) > touch_nmi_watchdog(); > > if (sysctl_hung_task_panic) { > + /* Dump all tasks. */ > + show_state_filter(TASK_UNINTERRUPTIBLE); > trigger_all_cpu_backtrace(); > panic("hung_task: blocked tasks"); > }
Well, it's going to produce more gunk for the operator to read through and understand.
I'd like to hear a little more about the value of this change: what particular problem prompted it, etc.
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