tree 18994dd844840f3cab632ed4de64c88415fa019b
parent 789872886c7a7be929c5ba092e08c857e2712851
author Joel Fernandes (Google) <joel@joelfernandes.org> 1665511302 +0000
committer Paul E. McKenney <paulmck@kernel.org> 1665757393 -0700

rcu/debug: Add wake-up debugging for lazy callbacks

This patch adds initial debugging for lazy callback: whether the
callback does a wake up or not. We see that callbacks doing wake ups are
usually associated with synchronous use cases (SCSI, rcu_sync,
synchronize_rcu() etc).

The code is not very intrusive as almost all the logic is in
'lazy-debug.h' with just a few calls from tree.c

In the future, we will add more functionality such as ensuring
callbacks execute in bounded time.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>