On Tue, Oct 06, 2015 at 10:23:51AM -0700, Josh Triplett wrote:
> On Tue, Oct 06, 2015 at 09:13:05AM -0700, Paul E. McKenney wrote:
> > Hello!
> >
> > This series contains miscellaneous fixes:
> >
> > 1. Export sched_setscheduler_nocheck() so that the new locktorture
> > rtmutex_lock tests can be run as modules, courtesy of Davidlohr
> > Bueso.
> >
> > 2. Use rcu_callback_t in call_rcu*() and friends to improve
> > readability and to make cscope able to find them, courtesy of
> > Boqun Feng.
> >
> > 3. Use call_rcu_func_t to replace explicit type equivalents when
> > defining RCU callback functions, courtesy of Boqun Feng.
> >
> > 4. Don't unnecessarily disable preemption for Tiny and Tree
> > RCU readers (only for preemptible RCU readers), courtesy
> > of Boqun Feng.
> >
> > 5. Eliminate boot-time panic when a silly boot-time fanout is
> > specified.
> >
> > 6. Add online/offline info to help debug stall-warning messages.
> >
> > 7. Move preemption disabling out of __srcu_read_lock() into
> > srcu_read_lock().
> >
> > 8. Finish folding ->fqs_state into ->gp_state, courtesy of Petr Mladek.
> >
> > 9. Correct comment for values of ->gp_state field.
> >
> > 10. Add rcu_pointer_handoff() to allow explicit marking of handing
> > off protection from RCU to some other means, such as locking
> > or reference counting.
> >
> > 11. Make list_entry_rcu() use lockless_dereference(), courtesy
> > of Patrick Marlier. Despite the fact that this patch
> > does nothing more than eliminate a single store and a
> > single load of an unshared stack variable it nevertheless
> > manages to provide a measurable performance increase:
> > http://people.csail.mit.edu/amatveev/RLU_SOSP2015.pdf
> >
> > 12. Remove deprecated rcu_lockdep_assert().
>
> (And a patch 13 not mentioned here.)
Oops... "Use WRITE_ONCE() when deleting from reader-visible list" included
to make KTSAN happier.
> I responded to patches 4, 6, and 10 with feedback; for the rest (and for
> those with the issues addressed):
>
> Reviewed-by: Josh Triplett <j...@joshtriplett.org>
Thank you for the review and comments!
Thanx, Paul
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