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Message-ID: <20160427145926.GA24899@gmail.com> Date: Wed, 27 Apr 2016 16:59:27 +0200 From: Ingo Molnar <mingo@...nel.org> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Cc: linux-kernel@...r.kernel.org, anna-maria@...utronix.de, artem.savkov@...il.com, boqun.feng@...il.com, yaodongdong@...wei.com Subject: Re: [GIT PULL rcu/next] RCU commits for 4.7 * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote: > Hello, Ingo, > > The changes in this series include: > > 1. Documentation updates, including fixes to the design-level > requirements documentation and a fixed version of the design-level > data-structure documentation. These fixes include removing > cartoons and getting rid of the html/htmlx duplication. > > http://lkml.kernel.org/g/20160412151755.GA22416@linux.vnet.ibm.com > > 2. Further improvements to the new-age expedited grace periods. > > http://lkml.kernel.org/g/20160412152906.GA23395@linux.vnet.ibm.com > > 3. Miscellaneous fixes. > > http://lkml.kernel.org/g/20160412150157.GA19367@linux.vnet.ibm.com > > 4. Torture-test changes, including a new rcuperf module for measuring > RCU grace-period performance and scalability, which is useful for > the expedited-grace-period changes. > > http://lkml.kernel.org/g/20160412154332.GA24983@linux.vnet.ibm.com > > All of these changes have been subjected to 0day Test Robot and -next > testing, and are available in the git repository at: > > git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git for-mingo > > for you to fetch changes up to dcd36d01fb3f99d1d5df01714f6ccbe3fbbaf81f: > > Merge branches 'doc.2016.04.19a', 'exp.2016.03.31d', 'fixes.2016.03.31d' and 'torture.2016.04.21a' into HEAD (2016-04-21 13:48:20 -0700) > > ---------------------------------------------------------------- > Anna-Maria Gleixner (1): > rcutorture: Consider FROZEN hotplug notifier transitions > > Artem Savkov (1): > rcuperf: Do not wake up shutdown wait queue if "shutdown" is false. > > Boqun Feng (1): > rcu: Remove superfluous versions of rcu_read_lock_sched_held() > > Paul E. McKenney (53): > rcu: Consolidate dumping of ftrace buffer > documentation: Add real-time requirements from CPU-bound workloads > documentation: Add synchronize_rcu_mult() to the requirements > documentation: Explain why rcu_read_lock() needs no barrier() > documentation: Document illegality of call_rcu() from offline CPUs > documentation: Remove unnecessary images from requirements > documentation: Get rid of duplicate .htmlx file > documentation: Sharpen up the no-readers quick quiz > documentation: Emphasize the call_rcu() is illegal from idle > rcu: Make expedited RCU-sched grace period immediately detect idle > rcu: Make expedited RCU-preempt stall warnings count accurately > rcu: Make cond_resched_rcu_qs() supply RCU-sched expedited QS > rcu: Fix synchronize_rcu_expedited() header comment > rcu: Add event tracing definitions for expedited grace periods > rcu: Add funnel-locking tracing for expedited grace periods > rcu: Add expedited-grace-period event tracing > rcu: Remove expedited GP funnel-lock bypass > rcu: Force boolean subscript for expedited stall warnings > rcu: Shorten expedited_workdone* to exp_workdone* > rcu: Enforce expedited-GP fairness via funnel wait queue > rcu: Add exp_funnel_lock() fastpath > rcu: Consolidate expedited GP code into rcu_exp_wait_wake() > rcu: Consolidate expedited GP tracing into rcu_exp_gp_seq_snap() > rcu: Consolidate expedited GP code into exp_funnel_lock() > rcu: Overlap wakeups with next expedited grace period > rcu: Awaken grace-period kthread when stalled > rcu: Make FQS schedule advance only if FQS happened > rcu: Awaken grace-period kthread if too long since FQS > rcu: Dump ftrace buffer when kicking grace-period kthread > rcutorture: Update scripting to accommodate rcuperf > rcutorture: Allow for rcupdate.rcu_normal > rcutorture: Expedited-GP batch progress access to torturing > rcutorture: Add RCU grace-period performance tests > rcutorture: Documentation for rcuperf kernel parameters > rcutorture: Bind rcuperf reader/writer kthreads to CPUs > rcutorture: Set rcuperf writer kthreads to real-time priority > rcutorture: Print measure of batching efficiency > rcutorture: Make rcuperf collect expedited event-trace data > rcutorture: Make scripts analyze rcuperf trace data, if present > rcutorture: Add rcuperf holdoff boot parameter to reduce interference > rcutorture: Avoid RCU CPU stall warning and RT throttling > rcutorture: Add largish-system rcuperf scenario > rcutorture: Remove redundant initialization to zero > torture: Clarify refusal to run more than one torture test > torture: Kill qemu, not parent process > rcutorture: Convert test duration to seconds early > documentation: Add documentation for RCU's major data structures > rcutorture: Add OS-jitter capability > rcutorture: Don't rebuild identical kernel > rcutorture: Dump trace buffer upon shutdown > rcutorture: Add irqs-disabled test for call_rcu() > rcutorture: Add boot-time adjustment of leaf fanout > Merge branches 'doc.2016.04.19a', 'exp.2016.03.31d', 'fixes.2016.03.31d' and 'torture.2016.04.21a' into HEAD > > Yao Dongdong (1): > documentation: Make sample code and documentation consistent > > .../Design/Data-Structures/BigTreeClassicRCU.svg | 474 ++++ > .../Design/Data-Structures/BigTreeClassicRCUBH.svg | 499 ++++ > .../Data-Structures/BigTreeClassicRCUBHdyntick.svg | 695 +++++ > .../Data-Structures/BigTreePreemptRCUBHdyntick.svg | 741 ++++++ > .../BigTreePreemptRCUBHdyntickCB.svg | 858 ++++++ > .../Design/Data-Structures/Data-Structures.html | 1333 ++++++++++ > .../Design/Data-Structures/HugeTreeClassicRCU.svg | 939 +++++++ > .../RCU/Design/Data-Structures/TreeLevel.svg | 828 ++++++ > .../RCU/Design/Data-Structures/TreeMapping.svg | 305 +++ > .../Design/Data-Structures/TreeMappingLevel.svg | 380 +++ > .../RCU/Design/Data-Structures/blkd_task.svg | 843 ++++++ > .../RCU/Design/Data-Structures/nxtlist.svg | 396 +++ > .../RCU/Design/Requirements/2013-08-is-it-dead.png | Bin 100825 -> 0 bytes > .../RCU/Design/Requirements/RCUApplicability.svg | 237 -- > .../RCU/Design/Requirements/Requirements.html | 941 ++++--- > .../RCU/Design/Requirements/Requirements.htmlx | 2741 -------------------- > Documentation/RCU/Design/htmlqqz.sh | 108 - > Documentation/RCU/trace.txt | 10 +- > Documentation/RCU/whatisRCU.txt | 22 +- > Documentation/kernel-parameters.txt | 38 + > include/linux/rcupdate.h | 30 +- > include/linux/rcutiny.h | 16 + > include/linux/rcutree.h | 2 + > include/trace/events/rcu.h | 79 +- > kernel/rcu/Makefile | 1 + > kernel/rcu/rcuperf.c | 655 +++++ > kernel/rcu/rcutorture.c | 29 +- > kernel/rcu/tree.c | 302 ++- > kernel/rcu/tree.h | 20 +- > kernel/rcu/tree_plugin.h | 37 +- > kernel/rcu/tree_trace.c | 13 +- > kernel/rcu/update.c | 4 +- > kernel/torture.c | 4 +- > lib/Kconfig.debug | 33 + > tools/testing/selftests/rcutorture/bin/jitter.sh | 90 + > .../rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh | 121 + > .../rcutorture/bin/kvm-recheck-rcuperf.sh | 96 + > .../selftests/rcutorture/bin/kvm-recheck.sh | 5 +- > .../selftests/rcutorture/bin/kvm-test-1-run.sh | 59 +- > tools/testing/selftests/rcutorture/bin/kvm.sh | 24 +- > .../selftests/rcutorture/configs/rcu/TREE04 | 2 +- > .../selftests/rcutorture/configs/rcu/TREE04.boot | 2 +- > .../selftests/rcutorture/configs/rcuperf/CFLIST | 1 + > .../selftests/rcutorture/configs/rcuperf/CFcommon | 2 + > .../selftests/rcutorture/configs/rcuperf/TREE | 20 + > .../selftests/rcutorture/configs/rcuperf/TREE54 | 23 + > .../rcutorture/configs/rcuperf/ver_functions.sh | 52 + > 47 files changed, 10417 insertions(+), 3693 deletions(-) > create mode 100644 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCU.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCUBH.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/BigTreeClassicRCUBHdyntick.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntick.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntickCB.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/Data-Structures.html > create mode 100644 Documentation/RCU/Design/Data-Structures/HugeTreeClassicRCU.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/TreeLevel.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/TreeMapping.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/TreeMappingLevel.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/blkd_task.svg > create mode 100644 Documentation/RCU/Design/Data-Structures/nxtlist.svg > delete mode 100644 Documentation/RCU/Design/Requirements/2013-08-is-it-dead.png > delete mode 100644 Documentation/RCU/Design/Requirements/RCUApplicability.svg > delete mode 100644 Documentation/RCU/Design/Requirements/Requirements.htmlx > delete mode 100755 Documentation/RCU/Design/htmlqqz.sh > create mode 100644 kernel/rcu/rcuperf.c > create mode 100755 tools/testing/selftests/rcutorture/bin/jitter.sh > create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh > create mode 100755 tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh > create mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST > create mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon > create mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/TREE > create mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/TREE54 > create mode 100644 tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh Pulled, thanks a lot Paul! Ingo
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