On Thu, 2016-01-14 at 23:02 +0100, Hannes Frederic Sowa wrote:
We are just adding a second recursion limit solely to openvswitch which
has the same problem:
https://patchwork.ozlabs.org/patch/566769/
This time also we depend on rcu_read_lock marking the section being
nonpreemptible. Nice would be a more generic solution here which doesn't
need to always add something to *current.
Note that rcu_read_lock() does not imply that preemption is disabled.