Re: FAILED: patch "[PATCH] srcu: Allow use of Classic SRCU from both process and" failed to apply to 4.9-stable tree

Paolo Bonzini
2017-06-12T16:35:22Z

On 12/06/2017 18:31, Paul E. McKenney wrote:
> Indeed, this won't apply cleanly to 4.9 and earlier because of some
> changes to the way SRCU works. And if you try to make the obvious
> adjustments to make the patch apply, you will break SRCU.
>
> So, question for Paolo... How important is it to push this back to
> v4.9 and earlier? To make this happen, some non-trivial SRCU changes
> would also need to be backported.

Indeed I had noticed commit f2c4689640e9 ("srcu: Implement
more-efficient reader counts", 2017-01-25). It's not very important.

Paolo