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Date: Mon, 14 May 2012 08:48:17 +0200 From: Ingo Molnar <mingo@...nel.org> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Cc: mingo@...e.hu, linux-kernel@...r.kernel.org, rostedt@...dmis.org, dipankar@...ibm.com, pascal.chapperon@...adoo.fr, davej@...hat.com, michel@...irati.com.br, joern@...estorage.com, jengelh@...ozas.de, efault@....de, sivanich@....com, torvalds@...ux-foundation.org, peterz@...radead.org, laijs@...fujitsu.com Subject: Re: [GIT PULL rcu/next] RCU commits for 3.5 * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote: > Hello, Ingo, > > The major features of this series are: > > 1. A set of improvements and fixes to the RCU_FAST_NO_HZ feature > (with more on the way for 3.6). Posted to LKML: > https://lkml.org/lkml/2012/4/23/324 (commits 1-3 and 5), > https://lkml.org/lkml/2012/4/16/611 (commit 4), > https://lkml.org/lkml/2012/4/30/390 (commit 6), and > https://lkml.org/lkml/2012/5/4/410 (commit 7, combined with > the other commits for the convenience of the tester). > 2. Changes to make rcu_barrier() avoid disrupting execution of CPUs > that have no RCU callbacks. Posted to LKML: > https://lkml.org/lkml/2012/4/23/322. > 3. A couple of commits that improve the efficiency of the interaction > between preemptible RCU and the scheduler, these two being all > that survived an abortive attempt to allow preemptible RCU's > __rcu_read_lock() to be inlined. The full set was posted to > LKML at https://lkml.org/lkml/2012/4/14/143, and the first and > third patches of that set remain. > 4. Lai Jiangshan's algorithmic implementation of SRCU, which includes > call_srcu() and srcu_barrier(). A major feature of this new > implementation is that synchronize_srcu() no longer disturbs > the execution of other CPUs. This work is based on earlier > implementations by Peter Zijlstra and myself. Posted to > LKML: https://lkml.org/lkml/2012/2/22/82. > 5. A number of miscellaneous bug fixes and improvements which were > posted to LKML at: https://lkml.org/lkml/2012/4/23/353 with > subsequent updates posted to LKML. > > #1 and #2 are combined onto one topic branch due to dependencies among > the commits. > > All of these have been exposed to -next testing. > > These changes are available in the git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next > > Thanx, Paul > > --------------------> > Dave Jones (1): > rcu: List-debug variants of rcu list routines. > > Jan Engelhardt (1): > rcu: Make __kfree_rcu() less dependent on compiler choices > > Lai Jiangshan (10): > rcu: Remove fast check path from __synchronize_srcu() > rcu: Increment upper bit only for srcu_read_lock() > rcu: Flip ->completed only once per SRCU grace period > rcu: Improve SRCU's wait_idx() comments > rcu: Implement a variant of Peter's SRCU algorithm > rcu: Remove unused srcu_barrier() > rcu: Improve srcu_readers_active_idx()'s cache locality > rcu: Use single value to handle expedited SRCU grace periods > rcu: Implement per-domain single-threaded call_srcu() state machine > rcu: Add rcutorture test for call_srcu() > > Michel Machado (1): > rcu: Replace list_first_entry_rcu() with list_first_or_null_rcu() > > Paul E. McKenney (20): > rcu: Clarify help text for RCU_BOOST_PRIO > rcu: Reduce cache-miss initialization latencies for large systems > rcu: Document kernel command-line parameters > rcu: Document why rcu_blocking_is_gp() is safe > rcu: Add RCU_FAST_NO_HZ tracing for idle exit > rcu: Make RCU_FAST_NO_HZ use timer rather than hrtimer > rcu: Make RCU_FAST_NO_HZ account for pauses out of idle > rcu: Fixes to rcutorture error handling and cleanup > rcu: Add warning for RCU_FAST_NO_HZ timer firing > timer: Fix mod_timer_pinned() header comment > rcu: Introduce rcutorture testing for rcu_barrier() > rcu: Direct algorithmic SRCU implementation > rcu: Ensure that RCU_FAST_NO_HZ timers expire on correct CPU > rcu: Move PREEMPT_RCU preemption to switch_to() invocation > rcu: Make exit_rcu() more precise and consolidate > rcu: Update RCU maintainership > rcu: Make RCU_FAST_NO_HZ handle timer migration > rcu: Explicitly initialize RCU_FAST_NO_HZ per-CPU variables > rcu: Make rcu_barrier() less disruptive > Merge branches 'barrier.2012.05.09a', 'fixes.2012.04.26a', 'inline.2012.05.02b' and 'srcu.2012.05.07b' into HEAD > > Documentation/RCU/torture.txt | 15 +- > Documentation/kernel-parameters.txt | 88 ++++++- > MAINTAINERS | 14 +- > arch/um/drivers/mconsole_kern.c | 1 + > include/linux/rculist.h | 40 +++- > include/linux/rcupdate.h | 20 ++ > include/linux/rcutiny.h | 11 - > include/linux/rcutree.h | 19 -- > include/linux/sched.h | 10 + > include/linux/srcu.h | 48 +++- > include/trace/events/rcu.h | 2 + > init/Kconfig | 50 +++- > kernel/rcupdate.c | 28 ++ > kernel/rcutiny_plugin.h | 16 - > kernel/rcutorture.c | 257 +++++++++++++++- > kernel/rcutree.c | 332 ++++++++++++++++------ > kernel/rcutree.h | 23 +- > kernel/rcutree_plugin.h | 154 +++++++---- > kernel/rcutree_trace.c | 4 +- > kernel/sched/core.c | 1 + > kernel/srcu.c | 548 +++++++++++++++++++++++++++------- > kernel/timer.c | 8 +- > lib/list_debug.c | 22 ++ > 23 files changed, 1358 insertions(+), 353 deletions(-) Pulled, thanks a lot Paul! Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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