Hello!
This series contains miscellaneous fixes to RCU:
1. Tighten up __call_rcu's alignment check for the rcu_head structure
now that no arch does two-byte alignment of pointers.
2. Remove obsolete comment about when rcu_check_callbacks() was invoked.
3. Remove obsolete comment about which function opportunistically
notes grace periods beginnings and endings.
4. Update the RCU_TRACE Kconfig option's help text to note that
it enables event tracing in addition to debugfs, courtesy of
Nikolay Borisov.
5. Add event tracing for long read-side delays in rcutorture
in order to better debug too-short grace periods.
6. Make expedited grace periods recheck dyntick-idle state to avoid
sending needless IPIs.
7. Don't kick CPUs unless there is grace-period activity currently
in progress.
Thanx, Paul
------------------------------------------------------------------------
include/trace/events/rcu.h | 5 ++++-
kernel/rcu/rcutorture.c | 11 ++++++++++-
kernel/rcu/tree.c | 17 ++++++-----------
kernel/rcu/tree.h | 1 +
kernel/rcu/tree_exp.h | 12 +++++++++++-
lib/Kconfig.debug | 3 ++-
6 files changed, 34 insertions(+), 15 deletions(-)
