Re: 2.6.24 regression: pan hanging unkilleable and un-straceable

[Nick Piggin]

On Tuesday 22 January 2008 21:37, Ingo Molnar wrote:
> * Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:
> > Well I've twice tried to submit a patch to print stacks for running
> > tasks as well, but nobody seems interested. It would at least give a
> > chance to see something.
>
> i definitely remembering having done this myself a couple of times (it
> makes tons of sense to get _some_ info out of the system) but some
> problem in -mm kept reverting it. I dont remember the specifics ... it
> was some race.

Hmm, that's not unlikely. But there is nothing in the backtrace code
which prevents a task from being woken up anyway, is there? I guess
it will be more common now, but if we find a race we can try to fix
the root cause.
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