On Sat, Mar 28, 2020 at 06:16:59PM -0400, Joel Fernandes (Google) wrote:
> These patches clean up the usage of dynticks nesting counters simplifying the
> code, while preserving the usecases.
>
> It is a much needed simplification, makes the code less confusing, and prevents
> future bugs such as those that arise from forgetting that the
> dynticks_nmi_nesting counter is not a simple counter and can be "crowbarred" in
> common situations.
>
> rcutorture testing with all TREE RCU configurations succeed with
> CONFIG_RCU_EQS_DEBUG=y and CONFIG_PROVE_LOCKING=y.
Heh! We now have a three-way collision between Thomas's and Peter's
series, the RCU Tasks Trace series, and this series. ;-)
Remind me once v5.7-rc1 comes out and let's see what fits where.
Thanx, Paul
> v1->v2:
> - Rebase on v5.6-rc6
>
> Joel Fernandes (Google) (4):
> Revert b8c17e6664c4 ("rcu: Maintain special bits at bottom of
> ->dynticks counter")
> rcu/tree: Add better tracing for dyntick-idle
> rcu/tree: Clean up dynticks counter usage
> rcu/tree: Remove dynticks_nmi_nesting counter
>
> .../Data-Structures/Data-Structures.rst | 31 +--
> Documentation/RCU/stallwarn.txt | 6 +-
> include/linux/rcutiny.h | 3 -
> include/trace/events/rcu.h | 29 +--
> kernel/rcu/rcu.h | 4 -
> kernel/rcu/tree.c | 188 +++++++-----------
> kernel/rcu/tree.h | 4 +-
> kernel/rcu/tree_stall.h | 4 +-
> 8 files changed, 105 insertions(+), 164 deletions(-)
>
> --
> 2.26.0.rc2.310.g2932bb562d-goog
>
