* Mike Galbraith | 2015-03-21 19:02:23 [+0100]:

quoted

Steve, I'm still working on the fix we discussed using dummy irq_task.
I should be able to submit some time next week, if still interested.

Either that, or I think we should remove the function
spin_do_trylock_in_interrupt() to prevent any possibility of running
into similar problems in the future.

Why can't we just Let swapper be the owner when in irq with no dummy?

so you abuse the owner to be swapper and mask it out everywhere. It does
not look like a final solution. I'm more inclined to take you other
patch. In the end I hope we get a timer re-work and do not need any
hackary around it…

I have "don't raise timer unconditionally" re-applied, the check for a
running callback bits of my nohz_full fixlet, and the below on top of
that, and all _seems_ well.

Sebastian
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